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d0b9a9aef0
11456 Commits
| Author | SHA1 | Message | Date | |
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Arnaldo Carvalho de Melo
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ea08969273 |
perf evsel: Rename *perf_evsel__read*() to *evsel__read()
As those are 'struct evsel' methods, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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53fcfa6b8e |
perf evsel: Ditch perf_evsel__cmp(), not used for quite a while
In
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Arnaldo Carvalho de Melo
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c754c382c9 |
perf evsel: Rename perf_evsel__is_*() to evsel__is*()
As those are 'struct evsel' methods, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Stephane Eranian
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3a50dc7605 |
perf pmu: Add perf_pmu__find_by_type helper
This is used by libpfm4 during event parsing to locate the pmu for an event. Signed-off-by: Stephane Eranian <eranian@google.com> Reviewed-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrii Nakryiko <andriin@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Igor Lubashev <ilubashe@akamai.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Jiwei Sun <jiwei.sun@windriver.com> Cc: John Garry <john.garry@huawei.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yonghong Song <yhs@fb.com> Cc: bpf@vger.kernel.org Cc: netdev@vger.kernel.org Cc: yuzhoujian <yuzhoujian@didichuxing.com> Link: http://lore.kernel.org/lkml/20200429231443.207201-4-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Ian Rogers
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4b1984491e |
perf doc: Pass ASCIIDOC_EXTRA as an argument
commit
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Ian Rogers
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266150c94c |
perf mem2node: Avoid double free related to realloc
Realloc of size zero is a free not an error, avoid this causing a double
free. Caught by clang's address sanitizer:
==2634==ERROR: AddressSanitizer: attempting double-free on 0x6020000015f0 in thread T0:
#0 0x5649659297fd in free llvm/llvm-project/compiler-rt/lib/asan/asan_malloc_linux.cpp:123:3
#1 0x5649659e9251 in __zfree tools/lib/zalloc.c:13:2
#2 0x564965c0f92c in mem2node__exit tools/perf/util/mem2node.c:114:2
#3 0x564965a08b4c in perf_c2c__report tools/perf/builtin-c2c.c:2867:2
#4 0x564965a0616a in cmd_c2c tools/perf/builtin-c2c.c:2989:10
#5 0x564965944348 in run_builtin tools/perf/perf.c:312:11
#6 0x564965943235 in handle_internal_command tools/perf/perf.c:364:8
#7 0x5649659440c4 in run_argv tools/perf/perf.c:408:2
#8 0x564965942e41 in main tools/perf/perf.c:538:3
0x6020000015f0 is located 0 bytes inside of 1-byte region [0x6020000015f0,0x6020000015f1)
freed by thread T0 here:
#0 0x564965929da3 in realloc third_party/llvm/llvm-project/compiler-rt/lib/asan/asan_malloc_linux.cpp:164:3
#1 0x564965c0f55e in mem2node__init tools/perf/util/mem2node.c:97:16
#2 0x564965a08956 in perf_c2c__report tools/perf/builtin-c2c.c:2803:8
#3 0x564965a0616a in cmd_c2c tools/perf/builtin-c2c.c:2989:10
#4 0x564965944348 in run_builtin tools/perf/perf.c:312:11
#5 0x564965943235 in handle_internal_command tools/perf/perf.c:364:8
#6 0x5649659440c4 in run_argv tools/perf/perf.c:408:2
#7 0x564965942e41 in main tools/perf/perf.c:538:3
previously allocated by thread T0 here:
#0 0x564965929c42 in calloc third_party/llvm/llvm-project/compiler-rt/lib/asan/asan_malloc_linux.cpp:154:3
#1 0x5649659e9220 in zalloc tools/lib/zalloc.c:8:9
#2 0x564965c0f32d in mem2node__init tools/perf/util/mem2node.c:61:12
#3 0x564965a08956 in perf_c2c__report tools/perf/builtin-c2c.c:2803:8
#4 0x564965a0616a in cmd_c2c tools/perf/builtin-c2c.c:2989:10
#5 0x564965944348 in run_builtin tools/perf/perf.c:312:11
#6 0x564965943235 in handle_internal_command tools/perf/perf.c:364:8
#7 0x5649659440c4 in run_argv tools/perf/perf.c:408:2
#8 0x564965942e41 in main tools/perf/perf.c:538:3
v2: add a WARN_ON_ONCE when the free condition arises.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: clang-built-linux@googlegroups.com
Link: http://lore.kernel.org/lkml/20200320182347.87675-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo
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efc0cdc9ed |
perf evsel: Rename perf_evsel__{str,int}val() and other tracepoint field metehods to to evsel__*()
As those are not 'struct evsel' methods, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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aa8c406b0a |
perf evsel: Rename perf_evsel__open_per_*() to evsel__open_per_*()
As those are not 'struct evsel' methods, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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ad681adf1d |
perf evsel: Rename perf_evsel__*filter*() to evsel__*filter*()
As those are not 'struct evsel' methods, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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862b2f8fbc |
perf evsel: Rename *perf_evsel__*set_sample_*() to *evsel__*set_sample_*()
As they are not 'struct evsel' methods, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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347c751a64 |
perf evsel: Rename perf_evsel__group_desc() to evsel__group_desc()
As it is a 'struct evsel' method, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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8ab2e96d8f |
perf evsel: Rename *perf_evsel__*name() to *evsel__*name()
As they are 'struct evsel' methods or related routines, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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2aaefde4d9 |
perf evsel: Rename __perf_evsel__sample_size() to __evsel__sample_size()
As it is a 'struct evsel' related method, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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4b5e87b741 |
perf evsel: Rename perf_evsel__calc_id_pos() to evsel__calc_id_pos()
As it is a 'struct evsel' method, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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6ec17b4e25 |
perf evsel: Rename perf_evsel__config*() to evsel__config*()
As they are all 'struct evsel' methods, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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30f7c59124 |
perf evsel: Rename perf_evsel__exit() to evsel__exit()
As it is a 'struct evsel' method, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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39453ed559 |
perf evsel: Rename perf_evsel__is_aux_event() to evsel__is_aux_event()
As it is a 'struct evsel' method, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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e76026bdd5 |
perf evsel: Rename perf_evsel__find_pmu() to evsel__find_pmu()
As it is a 'struct evsel' method, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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12f5261dac |
perf evsel: Rename perf_evsel__compute_deltas() to evsel__compute_deltas()
As it is a 'struct evsel' method, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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5eb88f0476 |
perf evsel: Rename perf_evsel__nr_cpus() to evsel__nr_cpus()
As it is a 'struct evsel' method, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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65ddce3fd8 |
perf evsel: Rename 'struct perf_evsel__sb_cb_t' to 'struct evsel__sb_cb_t'
As the "perf_" prefix should be restricted to functions and types in tools/lib/perf/, aka libperf, this way we reduce a bit the confusion for types only in libperf or the ones in the more contained tools/perf/ project. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Adrian Hunter
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6dd912cbad |
perf intel-pt: Update documentation about using /proc/kcore
Update documentation to reflect the advent of the --kcore option for 'perf record'. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200429150751.12570-10-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Adrian Hunter
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43358d9dfb |
perf intel-pt: Update documentation about itrace G and L options
Provide a little more information about the new G and L options, particularly the issue with large PEBs. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200429150751.12570-9-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Adrian Hunter
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f0a0251cee |
perf intel-pt: Add support for synthesizing branch stacks for regular events
Use the new thread_stack__br_sample_late() function to create a thread
stack for regular events.
Example:
# perf record --kcore --aux-sample -e '{intel_pt//,cycles:ppp}' -c 10000 uname
Linux
[ perf record: Woken up 2 times to write data ]
[ perf record: Captured and wrote 0.743 MB perf.data ]
# perf report --itrace=Le --stdio | head -30 | tail -18
# Samples: 11K of event 'cycles:ppp'
# Event count (approx.): 11648
#
# Overhead Command Source Shared Object Source Symbol Target Symbol Basic Block Cycles
# ........ ....... .................... ............................ ............................ ..................
#
5.49% uname libc-2.30.so [.] _dl_addr [.] _dl_addr -
2.41% uname ld-2.30.so [.] _dl_relocate_object [.] _dl_relocate_object -
2.31% uname ld-2.30.so [.] do_lookup_x [.] do_lookup_x -
2.17% uname [kernel.kallsyms] [k] unmap_page_range [k] unmap_page_range -
2.05% uname ld-2.30.so [k] _dl_start [k] _dl_start -
1.97% uname ld-2.30.so [.] _dl_lookup_symbol_x [.] _dl_lookup_symbol_x -
1.94% uname [kernel.kallsyms] [k] filemap_map_pages [k] filemap_map_pages -
1.60% uname [kernel.kallsyms] [k] __handle_mm_fault [k] __handle_mm_fault -
1.44% uname [kernel.kallsyms] [k] page_add_file_rmap [k] page_add_file_rmap -
1.12% uname [kernel.kallsyms] [k] vma_interval_tree_insert [k] vma_interval_tree_insert -
0.94% uname [kernel.kallsyms] [k] perf_iterate_ctx [k] perf_iterate_ctx -
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200429150751.12570-8-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Adrian Hunter
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3749e0bbde |
perf thread-stack: Add thread_stack__br_sample_late()
Add a thread stack function to create a branch stack for hardware events where the sample records get created some time after the event occurred. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200429150751.12570-7-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Adrian Hunter
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6cd2cbfc68 |
perf evsel: Add support for synthesized branch stack sample type
Allow for a synthesized branch stack to be added to samples. As with synthesized call chains, the sample type cannot be changed because it is needed to continue to parse events. So add and use helper function evsel__has_br_stack() to indicate a branch stack, whether original or synthesized. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200429150751.12570-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Adrian Hunter
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ec90e42ce5 |
perf auxtrace: Add option to synthesize branch stack for regular events
There is an existing option to synthesize branch stacks for synthesized events. Add a new option to synthesize branch stacks for regular events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200429150751.12570-5-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Adrian Hunter
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cf888e08a0 |
perf intel-pt: Change branch stack support to use thread-stacks
Change Intel PT's branch stack support to use thread stacks. The
advantages of using branch stack support from the thread-stack are:
1. the branches are accumulated separately for each thread
2. the branch stack is cleared only in between continuous traces
This helps pave the way for adding branch stacks to regular events, not
just synthesized events as at present.
While the 2 approaches are not identical, in simple cases the results
can be identical e.g.
Before:
# perf record --kcore -e intel_pt// uname
# perf script --itrace=i10usl -F+brstacksym,+addr,+flags > cmp1.txt
After:
# perf script --itrace=i10usl -F+brstacksym,+addr,+flags > cmp2.txt
# diff -s cmp1.txt cmp2.txt
Files cmp1.txt and cmp2.txt are identical
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200429150751.12570-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Adrian Hunter
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1ef998ff18 |
perf intel-pt: Consolidate thread-stack use condition
The components of the condition do not change, so consolidate them in one variable. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200429150751.12570-3-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Adrian Hunter
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86d67180b9 |
perf thread-stack: Add branch stack support
Intel PT already has support for creating branch stacks for each context (per-cpu or per-thread). In the more common per-cpu case, the branch stack is not separated for different threads, instead being cleared in between each sample. That approach will not work very well for adding branch stacks to regular events. The branch stacks really need to be accumulated separately for each thread. As a start to accomplishing that, this patch adds support for putting branch stack support into the thread-stack. The advantages are: 1. the branches are accumulated separately for each thread 2. the branch stack is cleared only in between continuous traces This helps pave the way for adding branch stacks to regular events, not just synthesized events as at present. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200429150751.12570-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Konstantin Khlebnikov
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bb629484d9 |
perf tools: Simplify checking if SMT is active.
SMT now could be disabled via "/sys/devices/system/cpu/smt/control". Status is shown in "/sys/devices/system/cpu/smt/active" simply as "0" / "1". If this knob isn't here then fallback to checking topology as before. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/158817741394.748034.9273604089138009552.stgit@buzz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Konstantin Khlebnikov
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846de4371f |
perf tools: Fix reading new topology attribute "core_cpus"
Check if access("devices/system/cpu/cpu%d/topology/core_cpus", F_OK)
fails, which will happen unless the current directory is "/sys".
Simply try to read this file first.
Fixes:
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Ian Rogers
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ba08829aac |
perf parse-events: Fix another memory leaks found on parse_events()
Fix another memory leak found by applying LLVM's libfuzzer on parse_events(). Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: clang-built-linux@googlegroups.com Link: http://lore.kernel.org/lkml/20200319023101.82458-1-irogers@google.com [ split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Ian Rogers
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672f707ef5 |
perf parse-events: Fix memory leaks found on parse_events
free_list_evsel() deals with tools/perf/ evsels, not with libperf perf_evsels, use the right destructor and avoid a leak, as evsel__delete() will delete something perf_evsel__delete() doesn't. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: clang-built-linux@googlegroups.com Link: http://lore.kernel.org/lkml/20200319023101.82458-1-irogers@google.com [ split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ian Rogers
|
e8dfb81838 |
perf parse-events: Fix memory leaks found on parse_events
Fix a memory leak found by applying LLVM's libfuzzer on parse_events(). Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: clang-built-linux@googlegroups.com Link: http://lore.kernel.org/lkml/20200319023101.82458-1-irogers@google.com [ split from a larger patch, use zfree() ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
23cbb41c93 |
perf record: Move side band evlist setup to separate routine
It is quite big by now, move that code to a separate record__setup_sb_evlist() routine. Suggested-by: Jiri Olsa <jolsa@redhat.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200429131106.27974-9-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
899e5ffbf2 |
perf record: Introduce --switch-output-event
Now we can use it with --overwrite to have a flight recorder mode that
gets snapshot requests from arbitrary events that are processed in the
side band thread together with the PERF_RECORD_BPF_EVENT processing.
Example:
To collect scheduler events until a recvmmsg syscall happens, system
wide:
[root@five a]# rm -f perf.data.2020042717*
[root@five a]# perf record --overwrite -e sched:*switch,syscalls:*recvmmsg --switch-output-event syscalls:sys_enter_recvmmsg
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2020042717585458 ]
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2020042717590235 ]
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2020042717590398 ]
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Dump perf.data.2020042717590511 ]
[ perf record: Captured and wrote 7.244 MB perf.data.<timestamp> ]
So in the above case we had 3 snapshots, the fourth was forced by
control+C:
[root@five a]# ls -la
total 20440
drwxr-xr-x. 2 root root 4096 Apr 27 17:59 .
dr-xr-x---. 12 root root 4096 Apr 27 17:46 ..
-rw-------. 1 root root 3936125 Apr 27 17:58 perf.data.2020042717585458
-rw-------. 1 root root 5074869 Apr 27 17:59 perf.data.2020042717590235
-rw-------. 1 root root 4291037 Apr 27 17:59 perf.data.2020042717590398
-rw-------. 1 root root 7617037 Apr 27 17:59 perf.data.2020042717590511
[root@five a]#
One can make this more precise by adding the switch output event to the
main -e events list, as since this is done asynchronously, a few events
after the signal event will appear in the snapshots, as can be seen
with:
[root@five a]# rm -f perf.data.20200427175*
[root@five a]# perf record --overwrite -e sched:*switch,syscalls:*recvmmsg --switch-output-event syscalls:sys_enter_recvmmsg
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2020042718024203 ]
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2020042718024301 ]
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2020042718024484 ]
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Dump perf.data.2020042718024562 ]
[ perf record: Captured and wrote 7.337 MB perf.data.<timestamp> ]
[root@five a]# perf script -i perf.data.2020042718024203 | tail -15
PacerThread 148586 [005] 122.830729: sched:sched_switch: prev_comm=PacerThread prev_pid=148586...
swapper 0 [000] 122.833588: sched:sched_switch: prev_comm=swapper/0 prev_pid=...
NetworkManager 1251 [000] 122.833619: syscalls:sys_enter_recvmmsg: fd: 0x0000001c, mmsg: 0x7ffe83054a1...
swapper 0 [002] 122.833624: sched:sched_switch: prev_comm=swapper/2 prev_pid=...
swapper 0 [003] 122.833624: sched:sched_switch: prev_comm=swapper/3 prev_pid=...
NetworkManager 1251 [000] 122.833626: syscalls:sys_exit_recvmmsg: 0x1
kworker/3:3-eve 158946 [003] 122.833628: sched:sched_switch: prev_comm=kworker/3:3 prev_pid=15894...
swapper 0 [004] 122.833641: sched:sched_switch: prev_comm=swapper/4 prev_pid=...
NetworkManager 1251 [000] 122.833642: sched:sched_switch: prev_comm=NetworkManage...
perf 228273 [002] 122.833645: sched:sched_switch: prev_comm=perf prev_pid=22827...
swapper 0 [011] 122.833646: sched:sched_switch: prev_comm=swapper/1...
swapper 0 [002] 122.833648: sched:sched_switch: prev_comm=swapper/...
kworker/0:2-eve 207387 [000] 122.833648: sched:sched_switch: prev_comm=kworker/0:2 prev_pid=20738...
kworker/2:3-eve 232038 [002] 122.833652: sched:sched_switch: prev_comm=kworker/2:3 prev_pid=23203...
perf 235825 [003] 122.833653: sched:sched_switch: prev_comm=perf prev_pid=23582...
[root@five a]#
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lore.kernel.org/lkml/20200429131106.27974-8-acme@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Arnaldo Carvalho de Melo
|
976be84504 |
perf evlist: Allow reusing the side band thread for more purposes
I.e. so far we had just one event in that side band thread, a dummy one with attr.bpf_event set, so that 'perf record' can go ahead and ask the kernel for further information about BPF programs being loaded. Allow for more than one event to be there, so that we can use it as well for the upcoming --switch-output-event feature. Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200429131106.27974-6-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
9a39994467 |
perf evlist: Move the sideband thread routines to separate object
To avoid dragging more stuff into the perf python binding in the following csets. Reported-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
d0abbc3ce6 |
perf parse-events: Add parse_events_option() variant that creates evlist
For the upcoming --switch-output-event option we want to create the side band event, populate it with the specified events and then, if it is present multiple times, go on adding to it, then, if the BPF tracking is required, use the first event to set its attr.bpf_event to get those PERF_RECORD_BPF_EVENT metadata events too. Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200429131106.27974-5-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
b38d85ef49 |
perf bpf: Decouple creating the evlist from adding the SB event
Renaming bpf_event__add_sb_event() to evlist__add_sb_event() and requiring that the evlist be allocated beforehand. This will allow using the same side band thread and evlist to be used for multiple purposes in addition to react to PERF_RECORD_BPF_EVENT soon after they are generated. Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200429131106.27974-4-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
ca6c9c8b10 |
perf top: Move sb_evlist to 'struct perf_top'
Where state related to a 'perf top' session is grouped. Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200429131106.27974-3-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
bc477d7983 |
perf record: Move sb_evlist to 'struct record'
Where state related to a 'perf record' session is grouped. Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: http://lore.kernel.org/lkml/20200429131106.27974-2-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
40c7d2460e |
perf tools: Move routines that probe for perf API features to separate file
Trying to disentangle this a bit further, unfortunately it uses parse_events(), its interesting to have it separated anyway, so do it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Kajol Jain
|
354575c00d |
perf vendor events power9: Add hv_24x7 socket/chip level metric events
The hv_24×7 feature in IBM® POWER9™ processor-based servers provide the
facility to continuously collect large numbers of hardware performance
metrics efficiently and accurately.
This patch adds hv_24x7 metric file for different Socket/chip
resources.
Result:
power9 platform:
command:# ./perf stat --metric-only -M Memory_RD_BW_Chip -C 0 -I 1000
1.000096188 0.9 0.3
2.000285720 0.5 0.1
3.000424990 0.4 0.1
command:# ./perf stat --metric-only -M PowerBUS_Frequency -C 0 -I 1000
1.000097981 2.3 2.3
2.000291713 2.3 2.3
3.000421719 2.3 2.3
4.000550912 2.3 2.3
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lore.kernel.org/lkml/20200401203340.31402-8-kjain@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Kajol Jain
|
3351c6da89 |
perf tools: Enable Hz/hz prinitg for --metric-only option
Commit
|
||
|
Kajol Jain
|
9022608ec5 |
perf tests expr: Added test for runtime param in metric expression
Added test case for parsing "?" in metric expression. Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Anju T Sudhakar <anju@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Joe Mario <jmario@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lore.kernel.org/lkml/20200401203340.31402-6-kjain@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kajol Jain
|
1e1a873dc6 |
perf metricgroups: Enhance JSON/metric infrastructure to handle "?"
Patch enhances current metric infrastructure to handle "?" in the metric
expression. The "?" can be use for parameters whose value not known
while creating metric events and which can be replace later at runtime
to the proper value. It also add flexibility to create multiple events
out of single metric event added in JSON file.
Patch adds function 'arch_get_runtimeparam' which is a arch specific
function, returns the count of metric events need to be created. By
default it return 1.
This infrastructure needed for hv_24x7 socket/chip level events.
"hv_24x7" chip level events needs specific chip-id to which the data is
requested. Function 'arch_get_runtimeparam' implemented in header.c
which extract number of sockets from sysfs file "sockets" under
"/sys/devices/hv_24x7/interface/".
With this patch basically we are trying to create as many metric events
as define by runtime_param.
For that one loop is added in function 'metricgroup__add_metric', which
create multiple events at run time depend on return value of
'arch_get_runtimeparam' and merge that event in 'group_list'.
To achieve that we are actually passing this parameter value as part of
`expr__find_other` function and changing "?" present in metric
expression with this value.
As in our JSON file, there gonna be single metric event, and out of
which we are creating multiple events.
To understand which data count belongs to which parameter value,
we also printing param value in generic_metric function.
For example,
command:# ./perf stat -M PowerBUS_Frequency -C 0 -I 1000
1.000101867 9,356,933 hv_24x7/pm_pb_cyc,chip=0/ # 2.3 GHz PowerBUS_Frequency_0
1.000101867 9,366,134 hv_24x7/pm_pb_cyc,chip=1/ # 2.3 GHz PowerBUS_Frequency_1
2.000314878 9,365,868 hv_24x7/pm_pb_cyc,chip=0/ # 2.3 GHz PowerBUS_Frequency_0
2.000314878 9,366,092 hv_24x7/pm_pb_cyc,chip=1/ # 2.3 GHz PowerBUS_Frequency_1
So, here _0 and _1 after PowerBUS_Frequency specify parameter value.
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lore.kernel.org/lkml/20200401203340.31402-5-kjain@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
Shaokun Zhang
|
454a8be0cf |
perf pmu: Fix function name in comment, its get_cpuid_str(), not get_cpustr()
get_cpuid_str() is used in tools/perf/arch/xxx/util/header.c, fix the name in comment. Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lore.kernel.org/lkml/1588141992-48382-1-git-send-email-zhangshaokun@hisilicon.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Zou Wei
|
6fa9c3e779 |
perf report: Fix warning assignment of 0/1 to bool variable
Fixes coccicheck warning: tools/perf/builtin-report.c:1403:2-34: WARNING: Assignment of 0/1 to bool variable Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zou Wei <zou_wei@huawei.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/1587904683-3510-1-git-send-email-zou_wei@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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|
Zou Wei
|
8284bbeab7 |
perf tools: Remove unneeded semicolons
Fixes coccicheck warnings: tools/perf/builtin-diff.c:1565:2-3: Unneeded semicolon tools/perf/builtin-lock.c:778:2-3: Unneeded semicolon tools/perf/builtin-mem.c:126:2-3: Unneeded semicolon tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c:555:2-3: Unneeded semicolon tools/perf/util/ordered-events.c:317:2-3: Unneeded semicolon tools/perf/util/synthetic-events.c:1131:2-3: Unneeded semicolon tools/perf/util/trace-event-read.c:78:2-3: Unneeded semicolon Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zou Wei <zou_wei@huawei.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/1588065523-71423-1-git-send-email-zou_wei@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Zou Wei
|
2cca512ad2 |
perf c2c: Remove unneeded semicolon
Fixes coccicheck warnings: tools/perf/builtin-c2c.c:1712:2-3: Unneeded semicolon tools/perf/builtin-c2c.c:1928:2-3: Unneeded semicolon tools/perf/builtin-c2c.c:2962:2-3: Unneeded semicolon Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zou Wei <zou_wei@huawei.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/1588064336-70456-1-git-send-email-zou_wei@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Stephane Eranian
|
fad1f1e7de |
perf script: Remove extraneous newline in perf_sample__fprintf_regs()
When printing iregs, there was a double newline printed because
perf_sample__fprintf_regs() was printing its own and then at the end of
all fields, perf script was adding one. This was causing blank line in
the output:
Before:
$ perf script -Fip,iregs
401b8d ABI:2 DX:0x100 SI:0x4a8340 DI:0x4a9340
401b8d ABI:2 DX:0x100 SI:0x4a9340 DI:0x4a8340
401b8d ABI:2 DX:0x100 SI:0x4a8340 DI:0x4a9340
401b8d ABI:2 DX:0x100 SI:0x4a9340 DI:0x4a8340
After:
$ perf script -Fip,iregs
401b8d ABI:2 DX:0x100 SI:0x4a8340 DI:0x4a9340
401b8d ABI:2 DX:0x100 SI:0x4a9340 DI:0x4a8340
401b8d ABI:2 DX:0x100 SI:0x4a8340 DI:0x4a9340
Committer testing:
First we need to figure out how to request that registers be recorded,
so we use:
# perf record -h reg
Usage: perf record [<options>] [<command>]
or: perf record [<options>] -- <command> [<options>]
-I, --intr-regs[=<any register>]
sample selected machine registers on interrupt, use '-I?' to list register names
--buildid-all Record build-id of all DSOs regardless of hits
--user-regs[=<any register>]
sample selected machine registers on interrupt, use '--user-regs=?' to list register names
#
Ok, now lets ask for them all:
# perf record -a --intr-regs --user-regs sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 4.105 MB perf.data (2760 samples) ]
#
Lets look at the first 6 output lines:
# perf script -Fip,iregs | head -6
ffffffff8a06f2f4 ABI:2 AX:0xffffd168fee0a980 BX:0xffff8a23b087f000 CX:0xfffeb69aaeb25d73 DX:0xffff8a253e8310f0 SI:0xfffffff9bafe7359 DI:0xffffb1690204fb10 BP:0xffffd168fee0a950 SP:0xffffb1690204fb88 IP:0xffffffff8a06f2f4 FLAGS:0x4e CS:0x10 SS:0x18 R8:0x1495f0a91129a R9:0xffff8a23b087f000 R10:0x1 R11:0xffffffff R12:0x0 R13:0xffff8a253e827e00 R14:0xffffd168fee0aa5c R15:0xffffd168fee0a980
ffffffff8a06f2f4 ABI:2 AX:0x0 BX:0xffffd168fee0a950 CX:0x5684cc1118491900 DX:0x0 SI:0xffffd168fee0a9d0 DI:0x202 BP:0xffffb1690204fd70 SP:0xffffb1690204fd20 IP:0xffffffff8a06f2f4 FLAGS:0x24e CS:0x10 SS:0x18 R8:0x0 R9:0xffffd168fee0a9d0 R10:0x1 R11:0xffffffff R12:0xffffffff8a23e480 R13:0xffff8a23b087f240 R14:0xffff8a23b087f000 R15:0xffffd168fee0a950
ffffffff8a06f2f4 ABI:2 AX:0x0 BX:0x0 CX:0x7f25f334335b DX:0x0 SI:0x2400 DI:0x4 BP:0x7fff5f264570 SP:0x7fff5f264538 IP:0xffffffff8a06f2f4 FLAGS:0x24e CS:0x10 SS:0x2b R8:0x0 R9:0x2312d20 R10:0x0 R11:0x246 R12:0x22cc0e0 R13:0x0 R14:0x0 R15:0x22d0780
#
Reproduced, apply the patch and:
[root@five ~]# perf script -Fip,iregs | head -6
ffffffff8a06f2f4 ABI:2 AX:0xffffd168fee0a980 BX:0xffff8a23b087f000 CX:0xfffeb69aaeb25d73 DX:0xffff8a253e8310f0 SI:0xfffffff9bafe7359 DI:0xffffb1690204fb10 BP:0xffffd168fee0a950 SP:0xffffb1690204fb88 IP:0xffffffff8a06f2f4 FLAGS:0x4e CS:0x10 SS:0x18 R8:0x1495f0a91129a R9:0xffff8a23b087f000 R10:0x1 R11:0xffffffff R12:0x0 R13:0xffff8a253e827e00 R14:0xffffd168fee0aa5c R15:0xffffd168fee0a980
ffffffff8a06f2f4 ABI:2 AX:0x0 BX:0xffffd168fee0a950 CX:0x5684cc1118491900 DX:0x0 SI:0xffffd168fee0a9d0 DI:0x202 BP:0xffffb1690204fd70 SP:0xffffb1690204fd20 IP:0xffffffff8a06f2f4 FLAGS:0x24e CS:0x10 SS:0x18 R8:0x0 R9:0xffffd168fee0a9d0 R10:0x1 R11:0xffffffff R12:0xffffffff8a23e480 R13:0xffff8a23b087f240 R14:0xffff8a23b087f000 R15:0xffffd168fee0a950
ffffffff8a06f2f4 ABI:2 AX:0x0 BX:0x0 CX:0x7f25f334335b DX:0x0 SI:0x2400 DI:0x4 BP:0x7fff5f264570 SP:0x7fff5f264538 IP:0xffffffff8a06f2f4 FLAGS:0x24e CS:0x10 SS:0x2b R8:0x0 R9:0x2312d20 R10:0x0 R11:0x246 R12:0x22cc0e0 R13:0x0 R14:0x0 R15:0x22d0780
ffffffff8a24074b ABI:2 AX:0xcb BX:0xcb CX:0x0 DX:0x0 SI:0xffffb1690204ff58 DI:0xcb BP:0xffffb1690204ff58 SP:0xffffb1690204ff40 IP:0xffffffff8a24074b FLAGS:0x24e CS:0x10 SS:0x18 R8:0x0 R9:0x0 R10:0x0 R11:0x0 R12:0x0 R13:0x0 R14:0x0 R15:0x0
ffffffff8a310600 ABI:2 AX:0x0 BX:0xffffffff8b8c39a0 CX:0x0 DX:0xffff8a2503890300 SI:0xffffb1690204ff20 DI:0xffff8a23e4080000 BP:0xffff8a23e4080000 SP:0xffffb1690204fec0 IP:0xffffffff8a310600 FLAGS:0x28e CS:0x10 SS:0x18 R8:0x0 R9:0x0 R10:0x0 R11:0x0 R12:0xffffffffffffffea R13:0xffff8a23e4080020 R14:0x0 R15:0x0
ffffffff8a11b688 ABI:2 AX:0x0 BX:0xffff8a237b7c8800 CX:0xffffb1690204fae0 DX:0x78 SI:0xffff8a237b7c8800 DI:0xffffb1690204fa10 BP:0xffffb1690204fb00 SP:0xffffb1690204fa00 IP:0xffffffff8a11b688 FLAGS:0x8a CS:0x10 SS:0x18 R8:0x1495f0a917eba R9:0xffffd168fde19a48 R10:0xffffb1690204fd98 R11:0xffff8a253e82afb0 R12:0xffff8a237b7c8800 R13:0xffffb1690204fb00 R14:0x0 R15:0xffff8a237b7c8800
[root@five ~]#
To see it more clearly, lets get just two of those registers by sample:
# perf record -a --intr-regs=ax,bx --user-regs=cx,dx sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 3.502 MB perf.data (1653 samples) ]
#
Extra info, lets see what gets setup in that 'struct perf_event_attr':
# perf evlist -v
cycles: size: 120, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD|REGS_USER|REGS_INTR, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 2, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1, sample_regs_user: 0xc, sample_regs_intr: 0x3
#
Cook, some PERF_SAMPLE_REGS_USER|PERF_SAMPLE_REGS_INTR +
attr.sample_regs_user and attr.sample_regs_intr register masks, now lets
see if those newlines are gone in a more compact fashion:
# perf script -Fip,iregs,uregs
ffffffff8a56df78 ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a29b78d ABI:2 AX:0x2a20ffcd6000 BX:0x2ec7d9000 ABI:2 CX:0x7f204460e49b DX:0xf42920
#
And where was that?
# perf script -Fip,iregs,uregs,sym,dso
ffffffff8a56df78 strrchr (/lib/modules/5.7.0-rc2/build/vmlinux) ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 strrchr (/lib/modules/5.7.0-rc2/build/vmlinux) ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 strrchr (/lib/modules/5.7.0-rc2/build/vmlinux) ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 strrchr (/lib/modules/5.7.0-rc2/build/vmlinux) ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 strrchr (/lib/modules/5.7.0-rc2/build/vmlinux) ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a56df78 strrchr (/lib/modules/5.7.0-rc2/build/vmlinux) ABI:2 AX:0xffff8a25137b6028 BX:0xffff8a2502f18000 ABI:2 CX:0x7f204460e49b DX:0xf42920
ffffffff8a29b78d __vma_link_rb (/lib/modules/5.7.0-rc2/build/vmlinux) ABI:2 AX:0x2a20ffcd6000 BX:0x2ec7d9000 ABI:2 CX:0x7f204460e49b DX:0xf42920
#
Signed-off-by: Stephane Eranian <eranian@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200418231908.152212-1-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Ian Rogers
|
2069425eb3 |
perf synthetic events: Remove use of sscanf from /proc reading
The synthesize benchmark, run on a single process and thread, shows
perf_event__synthesize_mmap_events as the hottest function with fgets
and sscanf taking the majority of execution time.
fscanf performs similarly well. Replace the scanf call with manual
reading of each field of the /proc/pid/maps line, and remove some
unnecessary buffering.
This change also addresses potential, but unlikely, buffer overruns for
the string values read by scanf.
Performance before is:
$ sudo perf bench internals synthesize -m 16 -M 16 -s -t
\# Running 'internals/synthesize' benchmark:
Computing performance of single threaded perf event synthesis by
synthesizing events on the perf process itself:
Average synthesis took: 102.810 usec (+- 0.027 usec)
Average num. events: 17.000 (+- 0.000)
Average time per event 6.048 usec
Average data synthesis took: 106.325 usec (+- 0.018 usec)
Average num. events: 89.000 (+- 0.000)
Average time per event 1.195 usec
Computing performance of multi threaded perf event synthesis by
synthesizing events on CPU 0:
Number of synthesis threads: 16
Average synthesis took: 68103.100 usec (+- 441.234 usec)
Average num. events: 30703.000 (+- 0.730)
Average time per event 2.218 usec
And after is:
$ sudo perf bench internals synthesize -m 16 -M 16 -s -t
\# Running 'internals/synthesize' benchmark:
Computing performance of single threaded perf event synthesis by
synthesizing events on the perf process itself:
Average synthesis took: 50.388 usec (+- 0.031 usec)
Average num. events: 17.000 (+- 0.000)
Average time per event 2.964 usec
Average data synthesis took: 52.693 usec (+- 0.020 usec)
Average num. events: 89.000 (+- 0.000)
Average time per event 0.592 usec
Computing performance of multi threaded perf event synthesis by
synthesizing events on CPU 0:
Number of synthesis threads: 16
Average synthesis took: 45022.400 usec (+- 552.740 usec)
Average num. events: 30624.200 (+- 10.037)
Average time per event 1.470 usec
On a Intel Xeon 6154 compiling with Debian gcc 9.2.1.
Committer testing:
On a AMD Ryzen 5 3600X 6-Core Processor:
Before:
# perf bench internals synthesize --min-threads 12 --max-threads 12 --st --mt
# Running 'internals/synthesize' benchmark:
Computing performance of single threaded perf event synthesis by
synthesizing events on the perf process itself:
Average synthesis took: 267.491 usec (+- 0.176 usec)
Average num. events: 56.000 (+- 0.000)
Average time per event 4.777 usec
Average data synthesis took: 277.257 usec (+- 0.169 usec)
Average num. events: 287.000 (+- 0.000)
Average time per event 0.966 usec
Computing performance of multi threaded perf event synthesis by
synthesizing events on CPU 0:
Number of synthesis threads: 12
Average synthesis took: 81599.500 usec (+- 346.315 usec)
Average num. events: 36096.100 (+- 2.523)
Average time per event 2.261 usec
#
After:
# perf bench internals synthesize --min-threads 12 --max-threads 12 --st --mt
# Running 'internals/synthesize' benchmark:
Computing performance of single threaded perf event synthesis by
synthesizing events on the perf process itself:
Average synthesis took: 110.125 usec (+- 0.080 usec)
Average num. events: 56.000 (+- 0.000)
Average time per event 1.967 usec
Average data synthesis took: 118.518 usec (+- 0.057 usec)
Average num. events: 287.000 (+- 0.000)
Average time per event 0.413 usec
Computing performance of multi threaded perf event synthesis by
synthesizing events on CPU 0:
Number of synthesis threads: 12
Average synthesis took: 43490.700 usec (+- 284.527 usec)
Average num. events: 37028.500 (+- 0.563)
Average time per event 1.175 usec
#
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrey Zhizhikin <andrey.z@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lore.kernel.org/lkml/20200415054050.31645-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Ian Rogers
|
e95770af4c |
tools api: Add a lightweight buffered reading api
The synthesize benchmark shows the majority of execution time going to fgets and sscanf, necessary to parse /proc/pid/maps. Add a new buffered reading library that will be used to replace these calls in a follow-up CL. Add tests for the library to perf test. Committer tests: $ perf test api 63: Test api io : Ok $ Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrey Zhizhikin <andrey.z@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lore.kernel.org/lkml/20200415054050.31645-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ian Rogers
|
13edc23720 |
perf bench: Add a multi-threaded synthesize benchmark
By default this isn't run as it reads /proc and may not have access.
For consistency, modify the single threaded benchmark to compute an
average time per event.
Committer testing:
$ grep -m1 "model name" /proc/cpuinfo
model name : Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz
$ grep "model name" /proc/cpuinfo | wc -l
8
$
$ perf bench internals synthesize -h
# Running 'internals/synthesize' benchmark:
Usage: perf bench internals synthesize <options>
-I, --multi-iterations <n>
Number of iterations used to compute multi-threaded average
-i, --single-iterations <n>
Number of iterations used to compute single-threaded average
-M, --max-threads <n>
Maximum number of threads in multithreaded bench
-m, --min-threads <n>
Minimum number of threads in multithreaded bench
-s, --st Run single threaded benchmark
-t, --mt Run multi-threaded benchmark
$
$ perf bench internals synthesize -t
# Running 'internals/synthesize' benchmark:
Computing performance of multi threaded perf event synthesis by
synthesizing events on CPU 0:
Number of synthesis threads: 1
Average synthesis took: 65449.000 usec (+- 586.442 usec)
Average num. events: 9405.400 (+- 0.306)
Average time per event 6.959 usec
Number of synthesis threads: 2
Average synthesis took: 37838.300 usec (+- 130.259 usec)
Average num. events: 9501.800 (+- 20.469)
Average time per event 3.982 usec
Number of synthesis threads: 3
Average synthesis took: 48551.400 usec (+- 225.686 usec)
Average num. events: 9544.000 (+- 0.000)
Average time per event 5.087 usec
Number of synthesis threads: 4
Average synthesis took: 29632.500 usec (+- 50.808 usec)
Average num. events: 9544.000 (+- 0.000)
Average time per event 3.105 usec
Number of synthesis threads: 5
Average synthesis took: 33920.400 usec (+- 284.509 usec)
Average num. events: 9544.000 (+- 0.000)
Average time per event 3.554 usec
Number of synthesis threads: 6
Average synthesis took: 27604.100 usec (+- 72.344 usec)
Average num. events: 9548.000 (+- 0.000)
Average time per event 2.891 usec
Number of synthesis threads: 7
Average synthesis took: 25406.300 usec (+- 933.371 usec)
Average num. events: 9545.500 (+- 0.167)
Average time per event 2.662 usec
Number of synthesis threads: 8
Average synthesis took: 24110.400 usec (+- 73.229 usec)
Average num. events: 9551.000 (+- 0.000)
Average time per event 2.524 usec
$
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrey Zhizhikin <andrey.z@gmail.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lore.kernel.org/lkml/20200415054050.31645-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Stephane Eranian
|
d99c22eabe |
perf record: Add num-synthesize-threads option
To control degree of parallelism of the synthesize_mmap() code which is scanning /proc/PID/task/PID/maps and can be time consuming. Mimic perf top way of handling the option. If not specified will default to 1 thread, i.e. default behavior before this option. On a desktop computer the processing of /proc/PID/task/PID/maps isn't slow enough to warrant parallel processing and the thread creation has some cost - hence the default of 1. On a loaded server with >100 cores it is possible to see synthesis times in the order of seconds and in this case having the option is desirable. As the processing is a synchronization point, it is legitimate to worry if Amdahl's law will apply to this patch. Profiling with this patch in place: https://lore.kernel.org/lkml/20200415054050.31645-4-irogers@google.com/ shows: ... - 32.59% __perf_event__synthesize_threads - 32.54% __event__synthesize_thread + 22.13% perf_event__synthesize_mmap_events + 6.68% perf_event__get_comm_ids.constprop.0 + 1.49% process_synthesized_event + 1.29% __GI___readdir64 + 0.60% __opendir ... That is the processing is 1.49% of execution time and there is plenty to make parallel. This is shown in the benchmark in this patch: https://lore.kernel.org/lkml/20200415054050.31645-2-irogers@google.com/ Computing performance of multi threaded perf event synthesis by synthesizing events on CPU 0: Number of synthesis threads: 1 Average synthesis took: 127729.000 usec (+- 3372.880 usec) Average num. events: 21548.600 (+- 0.306) Average time per event 5.927 usec Number of synthesis threads: 2 Average synthesis took: 88863.500 usec (+- 385.168 usec) Average num. events: 21552.800 (+- 0.327) Average time per event 4.123 usec Number of synthesis threads: 3 Average synthesis took: 83257.400 usec (+- 348.617 usec) Average num. events: 21553.200 (+- 0.327) Average time per event 3.863 usec Number of synthesis threads: 4 Average synthesis took: 75093.000 usec (+- 422.978 usec) Average num. events: 21554.200 (+- 0.200) Average time per event 3.484 usec Number of synthesis threads: 5 Average synthesis took: 64896.600 usec (+- 353.348 usec) Average num. events: 21558.000 (+- 0.000) Average time per event 3.010 usec Number of synthesis threads: 6 Average synthesis took: 59210.200 usec (+- 342.890 usec) Average num. events: 21560.000 (+- 0.000) Average time per event 2.746 usec Number of synthesis threads: 7 Average synthesis took: 54093.900 usec (+- 306.247 usec) Average num. events: 21562.000 (+- 0.000) Average time per event 2.509 usec Number of synthesis threads: 8 Average synthesis took: 48938.700 usec (+- 341.732 usec) Average num. events: 21564.000 (+- 0.000) Average time per event 2.269 usec Where average time per synthesized event goes from 5.927 usec with 1 thread to 2.269 usec with 8. This isn't a linear speed up as not all of synthesize code has been made parallel. If the synthesis time was about 10 seconds then using 8 threads may bring this down to less than 4. Signed-off-by: Stephane Eranian <eranian@google.com> Reviewed-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tony Jones <tonyj@suse.de> Cc: yuzhoujian <yuzhoujian@didichuxing.com> Link: http://lore.kernel.org/lkml/20200422155038.9380-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Tommi Rantala
|
dbd660e6b2 |
perf test session topology: Fix data path
Commit |
||
Jin Yao
|
197ba86fdc |
perf stat: Improve runtime stat for interval mode
For interval mode, the metric is printed after the '#' character if it
exists. But it's not calculated by the counts generated in this
interval.
See the following examples:
root@kbl-ppc:~# perf stat -M CPI -I1000 --interval-count 2
# time counts unit events
1.000422803 764,809 inst_retired.any # 2.9 CPI
1.000422803 2,234,932 cycles
2.001464585 1,960,061 inst_retired.any # 1.6 CPI
2.001464585 4,022,591 cycles
The second CPI should not be 1.6 (4,022,591/1,960,061 is 2.1)
root@kbl-ppc:~# perf stat -e cycles,instructions -I1000 --interval-count 2
# time counts unit events
1.000429493 2,869,311 cycles
1.000429493 816,875 instructions # 0.28 insn per cycle
2.001516426 9,260,973 cycles
2.001516426 5,250,634 instructions # 0.87 insn per cycle
The second 'insn per cycle' should not be 0.87 (5,250,634/9,260,973 is
0.57).
The current code uses a global variable 'rt_stat' for tracking and
updating the std dev of runtime stat. Unlike the counts, 'rt_stat' is not
reset for interval. While the counts are reset for interval.
perf_stat_process_counter()
{
if (config->interval)
init_stats(ps->res_stats);
}
So for interval mode, the 'rt_stat' variable should be reset too.
This patch resets 'rt_stat' before read_counters(), so the runtime stat
is only calculated by the counts generated in this interval.
With this patch:
root@kbl-ppc:~# perf stat -M CPI -I1000 --interval-count 2
# time counts unit events
1.000420924 2,408,818 inst_retired.any # 2.1 CPI
1.000420924 5,010,111 cycles
2.001448579 2,798,407 inst_retired.any # 1.6 CPI
2.001448579 4,599,861 cycles
root@kbl-ppc:~# perf stat -e cycles,instructions -I1000 --interval-count 2
# time counts unit events
1.000428555 2,769,714 cycles
1.000428555 774,462 instructions # 0.28 insn per cycle
2.001471562 3,595,904 cycles
2.001471562 1,243,703 instructions # 0.35 insn per cycle
Now the second 'insn per cycle' and CPI are calculated by the counts
generated in this interval.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-By: Kajol Jain <kjain@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200420145417.6864-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Jin Yao
|
0e0bf1ea11 |
perf stat: Zero all the 'ena' and 'run' array slot stats for interval mode
As the code comments in perf_stat_process_counter() say, we calculate
counter's data every interval, and the display code shows ps->res_stats
avg value. We need to zero the stats for interval mode.
But the current code only zeros the res_stats[0], it doesn't zero the
res_stats[1] and res_stats[2], which are for ena and run of counter.
This patch zeros the whole res_stats[] for interval mode.
Fixes:
|
||
|
Ian Rogers
|
1e76b171b7 |
perf script: Avoid NULL dereference on symbol
al->sym may be NULL given current if conditions and may cause a segv.
Fixes:
|
||
|
Tommi Rantala
|
41e7c32b97 |
perf bench: Fix div-by-zero if runtime is zero
Fix div-by-zero if runtime is zero: $ perf bench futex hash --runtime=0 # Running 'futex/hash' benchmark: Run summary [PID 12090]: 4 threads, each operating on 1024 [private] futexes for 0 secs. Floating point exception (core dumped) Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Darren Hart <dvhart@infradead.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lore.kernel.org/lkml/20200417132330.119407-4-tommi.t.rantala@nokia.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Tommi Rantala
|
d2e7d8636f |
perf cgroup: Avoid needless closing of unopened fd
Do not bother with close() if fd is not valid, just to silence valgrind:
$ valgrind ./perf script
==59169== Memcheck, a memory error detector
==59169== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==59169== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==59169== Command: ./perf script
==59169==
==59169== Warning: invalid file descriptor -1 in syscall close()
==59169== Warning: invalid file descriptor -1 in syscall close()
==59169== Warning: invalid file descriptor -1 in syscall close()
==59169== Warning: invalid file descriptor -1 in syscall close()
==59169== Warning: invalid file descriptor -1 in syscall close()
==59169== Warning: invalid file descriptor -1 in syscall close()
==59169== Warning: invalid file descriptor -1 in syscall close()
==59169== Warning: invalid file descriptor -1 in syscall close()
Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200417132330.119407-1-tommi.t.rantala@nokia.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
Kan Liang
|
12e89e65f4 |
perf hist: Add fast path for duplicate entries check
Perf checks the duplicate entries in a callchain before adding an entry. However the check is very slow especially with deeper call stack. Almost ~50% elapsed time of perf report is spent on the check when the call stack is always depth of 32. The hist_entry__cmp() is used to compare the new entry with the old entries. It will go through all the available sorts in the sort_list, and call the specific cmp of each sort, which is very slow. Actually, for most cases, there are no duplicate entries in callchain. The symbols are usually different. It's much faster to do a quick check for symbols first. Only do the full cmp when the symbols are exactly the same. The quick check is only to check symbols, not dso. Export _sort__sym_cmp. $ perf record --call-graph lbr ./tchain_edit_64 Without the patch $time perf report --stdio real 0m21.142s user 0m21.110s sys 0m0.033s With the patch $time perf report --stdio real 0m10.977s user 0m10.948s sys 0m0.027s Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-18-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
d80da766d1 |
perf c2c: Add option to enable the LBR stitching approach
With the LBR stitching approach, the reconstructed LBR call stack can break the HW limitation. However, it may reconstruct invalid call stacks in some cases, e.g. exception handing such as setjmp/longjmp. Also, it may impact the processing time especially when the number of samples with stitched LBRs are huge. Add an option to enable the approach. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-17-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
13e0c844fa |
perf top: Add option to enable the LBR stitching approach
With the LBR stitching approach, the reconstructed LBR call stack can break the HW limitation. However, it may reconstruct invalid call stacks in some cases, e.g. exception handing such as setjmp/longjmp. Also, it may impact the processing time especially when the number of samples with stitched LBRs are huge. Add an option to enable the approach. The option must be used with --call-graph lbr. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-16-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
680d125cd5 |
perf script: Add option to enable the LBR stitching approach
With the LBR stitching approach, the reconstructed LBR call stack can
break the HW limitation. However, it may reconstruct invalid call stacks
in some cases, e.g. exception handing such as setjmp/longjmp. Also, it
may impact the processing time especially when the number of samples
with stitched LBRs are huge.
Add an option to enable the approach.
Committer testing:
Using the same perf.data as with the latest cset committer testing
section:
$ perf script --stitch-lbr
<SNIP>
tchain_edit 11131 15164.984292: 437491 cycles:u:
401106 f43+0x0 (/wb/tchain_edit)
40114c f42+0x18 (/wb/tchain_edit)
401172 f41+0xe (/wb/tchain_edit)
401194 f40+0x0 (/wb/tchain_edit)
40119b f39+0x0 (/wb/tchain_edit)
4011a2 f38+0x0 (/wb/tchain_edit)
4011a9 f37+0x0 (/wb/tchain_edit)
4011b0 f36+0x0 (/wb/tchain_edit)
4011b7 f35+0x0 (/wb/tchain_edit)
4011be f34+0x0 (/wb/tchain_edit)
4011c5 f33+0x0 (/wb/tchain_edit)
4011cc f32+0x0 (/wb/tchain_edit)
401207 f31+0x34 (/wb/tchain_edit)
401212 f30+0x0 (/wb/tchain_edit)
401219 f29+0x0 (/wb/tchain_edit)
401220 f28+0x0 (/wb/tchain_edit)
401227 f27+0x0 (/wb/tchain_edit)
40122e f26+0x0 (/wb/tchain_edit)
401235 f25+0x0 (/wb/tchain_edit)
40123c f24+0x0 (/wb/tchain_edit)
401243 f23+0x0 (/wb/tchain_edit)
40124a f22+0x0 (/wb/tchain_edit)
401251 f21+0x0 (/wb/tchain_edit)
401258 f20+0x0 (/wb/tchain_edit)
40125f f19+0x0 (/wb/tchain_edit)
401266 f18+0x0 (/wb/tchain_edit)
40126d f17+0x0 (/wb/tchain_edit)
401274 f16+0x0 (/wb/tchain_edit)
40127b f15+0x0 (/wb/tchain_edit)
401282 f14+0x0 (/wb/tchain_edit)
401289 f13+0x0 (/wb/tchain_edit)
401290 f12+0x0 (/wb/tchain_edit)
401297 f11+0x0 (/wb/tchain_edit)
40129e f10+0x0 (/wb/tchain_edit)
4012a5 f9+0x0 (/wb/tchain_edit)
4012ac f8+0x0 (/wb/tchain_edit)
4012b3 f7+0x0 (/wb/tchain_edit)
4012ba f6+0x0 (/wb/tchain_edit)
4012c1 f5+0x0 (/wb/tchain_edit)
4012c8 f4+0x0 (/wb/tchain_edit)
4012cf f3+0x0 (/wb/tchain_edit)
4012d6 f2+0x0 (/wb/tchain_edit)
4012dd f1+0x0 (/wb/tchain_edit)
4012e4 main+0x0 (/wb/tchain_edit)
7f41a5016f41 __libc_start_main+0xf1 (/usr/lib64/libc-2.29.so)
<SNIP>
$
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200319202517.23423-15-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Kan Liang
|
b1d1429b18 |
perf report: Add option to enable the LBR stitching approach
With the LBR stitching approach, the reconstructed LBR call stack can
break the HW limitation. However, it may reconstruct invalid call stacks
in some cases, e.g. exception handing such as setjmp/longjmp. Also, it
may impact the processing time especially when the number of samples
with stitched LBRs are huge.
Add an option to enable the approach.
# To display the perf.data header info, please use
# --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 6K of event 'cycles'
# Event count (approx.): 6492797701
#
# Children Self Command Shared Object Symbol
# ........ ........ ............... ..................
# .................................
#
99.99% 99.99% tchain_edit tchain_edit [.] f43
|
---main
f1
f2
f3
f4
f5
f6
f7
f8
f9
f10
f11
f12
f13
f14
f15
f16
f17
f18
f19
f20
f21
f22
f23
f24
f25
f26
f27
f28
f29
f30
f31
|
--99.65%--f32
f33
f34
f35
f36
f37
f38
f39
f40
f41
f42
f43
Committer testing:
$ perf record --call-graph lbr /wb/tchain_edit
[ perf record: Woken up 23 times to write data ]
[ perf record: Captured and wrote 5.578 MB perf.data (6839 samples) ]
$ perf report --header-only | egrep 'cpu(desc|.*capabilities)'
# cpudesc : Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz
# cpu pmu capabilities: branches=32, max_precise=3, pmu_name=skylake
$
Before:
$ perf report --no-children --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 6K of event 'cycles:u'
# Event count (approx.): 6459523879
#
# Overhead Command Shared Object Symbol
# ........ ........... ................ .......................
#
99.95% tchain_edit tchain_edit [.] f43
|
--99.92%--f43
f42
f41
f40
f39
f38
f37
f36
f35
f34
f33
f32
f31
f30
f29
f28
f27
f26
f25
f24
f23
f22
f21
f20
f19
f18
f17
f16
f15
f14
f13
f12
f11
0.03% tchain_edit tchain_edit [.] f42
0.01% tchain_edit tchain_edit [.] f41
0.00% tchain_edit tchain_edit [.] f31
0.00% tchain_edit ld-2.29.so [.] _dl_relocate_object
0.00% tchain_edit ld-2.29.so [.] memmove
0.00% tchain_edit [unknown] [k] 0xffffffff93a00b17
After:
$ perf report --stitch-lbr --no-children --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 6K of event 'cycles:u'
# Event count (approx.): 6459496645
#
# Overhead Command Shared Object Symbol
# ........ ........... ................ ........................
#
99.97% tchain_edit tchain_edit [.] f43
|
--99.93%--f43
f42
f41
f40
f39
f38
f37
f36
f35
f34
f33
f32
f31
f30
f29
f28
f27
f26
f25
f24
f23
f22
f21
f20
f19
f18
f17
f16
f15
f14
f13
f12
f11
f10
f9
f8
f7
f6
f5
f4
f3
f2
f1
main
__libc_start_main
0.02% tchain_edit [unknown] [k] 0xffffffff93a00b17
0.01% tchain_edit tchain_edit [.] f31
0.00% tchain_edit ld-2.29.so [.] _dl_important_hwcaps
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200319202517.23423-14-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Kan Liang
|
ff165628d7 |
perf callchain: Stitch LBR call stack
In LBR call stack mode, the depth of reconstructed LBR call stack limits
to the number of LBR registers.
For example, on skylake, the depth of reconstructed LBR call stack is
always <= 32.
# To display the perf.data header info, please use
# --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 6K of event 'cycles'
# Event count (approx.): 6487119731
#
# Children Self Command Shared Object Symbol
# ........ ........ ............... ..................
# ................................
99.97% 99.97% tchain_edit tchain_edit [.] f43
|
--99.64%--f11
f12
f13
f14
f15
f16
f17
f18
f19
f20
f21
f22
f23
f24
f25
f26
f27
f28
f29
f30
f31
f32
f33
f34
f35
f36
f37
f38
f39
f40
f41
f42
f43
For a call stack which is deeper than LBR limit, HW will overwrite the
LBR register with oldest branch. Only partial call stacks can be
reconstructed.
However, the overwritten LBRs may still be retrieved from previous
sample. At that moment, HW hasn't overwritten the LBR registers yet.
Perf tools can stitch those overwritten LBRs on current call stacks to
get a more complete call stack.
To determine if LBRs can be stitched, perf tools need to compare current
sample with previous sample.
- They should have identical LBR records (Same from, to and flags
values, and the same physical index of LBR registers).
- The searching starts from the base-of-stack of current sample.
Once perf determines to stitch the previous LBRs, the corresponding LBR
cursor nodes will be copied to 'lists'. The 'lists' is to track the LBR
cursor nodes which are going to be stitched.
When the stitching is over, the nodes will not be freed immediately.
They will be moved to 'free_lists'. Next stitching may reuse the space.
Both 'lists' and 'free_lists' will be freed when all samples are
processed.
Committer notes:
Fix the intel-pt.c initialization of the union with 'struct
branch_flags', that breaks the build with its unnamed union on older gcc
versions.
Uninline thread__free_stitch_list(), as it grew big and started dragging
includes to thread.h, so move it to thread.c where what it needs in
terms of headers are already there.
This fixes the build in several systems such as debian:experimental when
cross building to the MIPS32 architecture, i.e. in the other cases what
was needed was being included by sheer luck.
In file included from builtin-sched.c:11:
util/thread.h: In function 'thread__free_stitch_list':
util/thread.h:169:3: error: implicit declaration of function 'free' [-Werror=implicit-function-declaration]
169 | free(pos);
| ^~~~
util/thread.h:169:3: error: incompatible implicit declaration of built-in function 'free' [-Werror]
util/thread.h:19:1: note: include '<stdlib.h>' or provide a declaration of 'free'
18 | #include "callchain.h"
+++ |+#include <stdlib.h>
19 |
util/thread.h:174:3: error: incompatible implicit declaration of built-in function 'free' [-Werror]
174 | free(pos);
| ^~~~
util/thread.h:174:3: note: include '<stdlib.h>' or provide a declaration of 'free'
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200319202517.23423-13-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Kan Liang
|
7f1d39317c |
perf callchain: Save previous cursor nodes for LBR stitching approach
The cursor nodes which generates from sample are eventually added into callchain. To avoid generating cursor nodes from previous samples again, the previous cursor nodes are also saved for LBR stitching approach. Some option, e.g. hide-unresolved, may hide some LBRs. Add a variable 'valid' in struct callchain_cursor_node to indicate this case. The LBR stitching approach will only append the valid cursor nodes from previous samples later. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-12-kan.liang@linux.intel.com [ Use zfree() instead of open coded equivalent, and use it when freeing members of structs ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
9c6c3f471d |
perf thread: Save previous sample for LBR stitching approach
To retrieve the overwritten LBRs from previous sample for LBR stitching approach, perf has to save the previous sample. Only allocate the struct lbr_stitch once, when LBR stitching approach is enabled and kernel supports hw_idx. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-11-kan.liang@linux.intel.com [ Use zalloc()/zfree() for thread->lbr_stitch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
771fd155df |
perf thread: Add a knob for LBR stitch approach
The LBR stitch approach should be disabled by default. Because - The stitching approach base on LBR call stack technology. The known limitations of LBR call stack technology still apply to the approach, e.g. Exception handing such as setjmp/longjmp will have calls/returns not match. - This approach is not foolproof. There can be cases where it creates incorrect call stacks from incorrect matches. There is no attempt to validate any matches in another way. The 'lbr_stitch_enable' is used to indicate whether enable LBR stitch approach, which is disabled by default. The following patch will introduce a new option for each tools to enable the LBR stitch approach. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-10-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
e2b23483eb |
perf machine: Factor out lbr_callchain_add_lbr_ip()
Both caller and callee needs to add ip from LBR to callchain. Factor out lbr_callchain_add_lbr_ip() to improve code readability. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-9-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
dd3e249a0c |
perf machine: Factor out lbr_callchain_add_kernel_ip()
Both caller and callee needs to add kernel ip to callchain. Factor out lbr_callchain_add_kernel_ip() to improve code readability. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-8-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
e48b8311ca |
perf machine: Refine the function for LBR call stack reconstruction
LBR only collect the user call stack. To reconstruct a call stack, both
kernel call stack and user call stack are required. The function
resolve_lbr_callchain_sample() mix the kernel call stack and user call
stack.
Now, with the help of HW idx, perf tool can reconstruct a more complete
call stack by adding some user call stack from previous sample. However,
current implementation is hard to be extended to support it.
Current code path for resolve_lbr_callchain_sample()
for (j = 0; j < mix_chain_nr; j++) {
if (ORDER_CALLEE) {
if (kernel callchain)
Fill callchain info
else if (LBR callchain)
Fill callchain info
} else {
if (LBR callchain)
Fill callchain info
else if (kernel callchain)
Fill callchain info
}
add_callchain_ip();
}
With the patch,
if (ORDER_CALLEE) {
for (j = 0; j < NUM of kernel callchain) {
Fill callchain info
add_callchain_ip();
}
for (; j < mix_chain_nr) {
Fill callchain info
add_callchain_ip();
}
} else {
for (; j < NUM of LBR callchain) {
Fill callchain info
add_callchain_ip();
}
for (j = 0; j < mix_chain_nr) {
Fill callchain info
add_callchain_ip();
}
}
No functional changes.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200319202517.23423-7-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Kan Liang
|
f8603267bf |
perf machine: Remove the indent in resolve_lbr_callchain_sample
The indent is unnecessary in resolve_lbr_callchain_sample. Removing it
will make the following patch simpler.
Current code path for resolve_lbr_callchain_sample()
/* LBR only affects the user callchain */
if (i != chain_nr) {
body of the function
....
return 1;
}
return 0;
With the patch,
/* LBR only affects the user callchain */
if (i == chain_nr)
return 0;
body of the function
...
return 1;
No functional changes.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200319202517.23423-6-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Kan Liang
|
6f91ea283a |
perf header: Support CPU PMU capabilities
To stitch LBR call stack, the max LBR information is required. So the CPU PMU capabilities information has to be stored in perf header. Add a new feature HEADER_CPU_PMU_CAPS for CPU PMU capabilities. Retrieve all CPU PMU capabilities, not just max LBR information. Add variable max_branches to facilitate future usage. Committer testing: # ls -la /sys/devices/cpu/caps/ total 0 drwxr-xr-x. 2 root root 0 Apr 17 10:53 . drwxr-xr-x. 6 root root 0 Apr 17 07:02 .. -r--r--r--. 1 root root 4096 Apr 17 10:53 max_precise # # cat /sys/devices/cpu/caps/max_precise 0 # perf record sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.033 MB perf.data (7 samples) ] # # perf report --header-only | egrep 'cpu(desc|.*capabilities)' # cpudesc : AMD Ryzen 5 3600X 6-Core Processor # cpu pmu capabilities: max_precise=0 # And then on an Intel machine: $ ls -la /sys/devices/cpu/caps/ total 0 drwxr-xr-x. 2 root root 0 Apr 17 10:51 . drwxr-xr-x. 6 root root 0 Apr 17 10:04 .. -r--r--r--. 1 root root 4096 Apr 17 11:37 branches -r--r--r--. 1 root root 4096 Apr 17 10:51 max_precise -r--r--r--. 1 root root 4096 Apr 17 11:37 pmu_name $ cat /sys/devices/cpu/caps/max_precise 3 $ cat /sys/devices/cpu/caps/branches 32 $ cat /sys/devices/cpu/caps/pmu_name skylake $ perf record sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.001 MB perf.data (8 samples) ] $ perf report --header-only | egrep 'cpu(desc|.*capabilities)' # cpudesc : Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz # cpu pmu capabilities: branches=32, max_precise=3, pmu_name=skylake $ Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-3-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Jiri Olsa
|
3a6c51e4d6 |
perf parser: Add support to specify rXXX event with pmu
The current rXXXX event specification creates event under PERF_TYPE_RAW
pmu type. This change allows to use rXXXX within pmu syntax, so it's
type is used via the following syntax:
-e 'cpu/r3c/'
-e 'cpum_cf/r0/'
The XXXX number goes directly to perf_event_attr::config the same way as
in '-e rXXXX' event. The perf_event_attr::type is filled with pmu type.
Committer testing:
So, lets see what goes in perf_event_attr::config for, say, the
'instructions' PERF_TYPE_HARDWARE (0) event, first we should look at how
to encode this event as a PERF_TYPE_RAW event for this specific CPU, an
AMD Ryzen 5:
# cat /sys/devices/cpu/events/instructions
event=0xc0
#
Then try with it _and_ the instruction, just to see that they are close
enough:
# perf stat -e rc0,instructions sleep 1
Performance counter stats for 'sleep 1':
919,794 rc0
919,898 instructions
1.000754579 seconds time elapsed
0.000715000 seconds user
0.000000000 seconds sys
#
Now we should try, before this patch, the PMU event encoding:
# perf stat -e cpu/rc0/ sleep 1
event syntax error: 'cpu/rc0/'
\___ unknown term
valid terms: event,edge,inv,umask,cmask,config,config1,config2,name,period,percore
#
Now with this patch, the three ways of specifying the 'instructions' CPU
counter are accepted:
# perf stat -e cpu/rc0/,rc0,instructions sleep 1
Performance counter stats for 'sleep 1':
892,948 cpu/rc0/
893,052 rc0
893,156 instructions
1.000931819 seconds time elapsed
0.000916000 seconds user
0.000000000 seconds sys
#
Requested-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Thomas Richter <tmricht@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Link: http://lore.kernel.org/lkml/20200416221405.437788-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Ian Rogers
|
e9cfa47e68 |
perf doc: allow ASCIIDOC_EXTRA to be an argument
This will allow parent makefiles to pass values to asciidoc. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrii Nakryiko <andriin@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Igor Lubashev <ilubashe@akamai.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Jiwei Sun <jiwei.sun@windriver.com> Cc: John Garry <john.garry@huawei.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yonghong Song <yhs@fb.com> Cc: bpf@vger.kernel.org Cc: netdev@vger.kernel.org Cc: yuzhoujian <yuzhoujian@didichuxing.com> Link: http://lore.kernel.org/lkml/20200416162058.201954-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kan Liang
|
9fbc61f832 |
perf pmu: Add support for PMU capabilities
The PMU capabilities information, which is located at /sys/bus/event_source/devices/<dev>/caps, is required by perf tool. For example, the max LBR information is required to stitch LBR call stack. Add perf_pmu__caps_parse() to parse the PMU capabilities information. The information is stored in a list. The following patch will store the capabilities information in perf header. Committer notes: Here's an example of such directories and its files in an i5 7th gen machine: [root@seventh ~]# ls -lad /sys/bus/event_source/devices/*/caps drwxr-xr-x. 2 root root 0 Apr 14 13:33 /sys/bus/event_source/devices/cpu/caps drwxr-xr-x. 2 root root 0 Apr 14 13:33 /sys/bus/event_source/devices/intel_pt/caps [root@seventh ~]# ls -la /sys/bus/event_source/devices/intel_pt/caps total 0 drwxr-xr-x. 2 root root 0 Apr 14 13:33 . drwxr-xr-x. 5 root root 0 Apr 14 13:12 .. -r--r--r--. 1 root root 4096 Apr 16 13:10 cr3_filtering -r--r--r--. 1 root root 4096 Apr 16 11:42 cycle_thresholds -r--r--r--. 1 root root 4096 Apr 16 13:10 ip_filtering -r--r--r--. 1 root root 4096 Apr 16 13:10 max_subleaf -r--r--r--. 1 root root 4096 Apr 14 13:33 mtc -r--r--r--. 1 root root 4096 Apr 14 13:33 mtc_periods -r--r--r--. 1 root root 4096 Apr 16 13:10 num_address_ranges -r--r--r--. 1 root root 4096 Apr 16 13:10 output_subsys -r--r--r--. 1 root root 4096 Apr 16 13:10 payloads_lip -r--r--r--. 1 root root 4096 Apr 16 13:10 power_event_trace -r--r--r--. 1 root root 4096 Apr 14 13:33 psb_cyc -r--r--r--. 1 root root 4096 Apr 14 13:33 psb_periods -r--r--r--. 1 root root 4096 Apr 16 13:10 ptwrite -r--r--r--. 1 root root 4096 Apr 16 13:10 single_range_output -r--r--r--. 1 root root 4096 Apr 16 12:03 topa_multiple_entries -r--r--r--. 1 root root 4096 Apr 16 13:10 topa_output [root@seventh ~]# cat /sys/bus/event_source/devices/intel_pt/caps/topa_output 1 [root@seventh ~]# cat /sys/bus/event_source/devices/intel_pt/caps/topa_multiple_entries 1 [root@seventh ~]# cat /sys/bus/event_source/devices/intel_pt/caps/mtc 1 [root@seventh ~]# cat /sys/bus/event_source/devices/intel_pt/caps/power_event_trace 0 [root@seventh ~]# [root@seventh ~]# ls -la /sys/bus/event_source/devices/cpu/caps/ total 0 drwxr-xr-x. 2 root root 0 Apr 14 13:33 . drwxr-xr-x. 6 root root 0 Apr 14 13:12 .. -r--r--r--. 1 root root 4096 Apr 16 13:10 branches -r--r--r--. 1 root root 4096 Apr 14 13:33 max_precise -r--r--r--. 1 root root 4096 Apr 16 13:10 pmu_name [root@seventh ~]# cat /sys/bus/event_source/devices/cpu/caps/max_precise 3 [root@seventh ~]# cat /sys/bus/event_source/devices/cpu/caps/branches 32 [root@seventh ~]# cat /sys/bus/event_source/devices/cpu/caps/pmu_name skylake [root@seventh ~]# Wow, first time I've heard about /sys/bus/event_source/devices/cpu/caps/max_precise, I think I'll use it! :-) Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pavel Gerasimov <pavel.gerasimov@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com> Link: http://lore.kernel.org/lkml/20200319202517.23423-2-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Stephane Eranian
|
bec49a9e05 |
perf stat: Force error in fallback on :k events
When it is not possible for a non-privilege perf command to monitor at
the kernel level (:k), the fallback code forces a :u. That works if the
event was previously monitoring both levels. But if the event was
already constrained to kernel only, then it does not make sense to
restrict it to user only.
Given the code works by exclusion, a kernel only event would have:
attr->exclude_user = 1
The fallback code would add:
attr->exclude_kernel = 1
In the end the end would not monitor in either the user level or kernel
level. In other words, it would count nothing.
An event programmed to monitor kernel only cannot be switched to user
only without seriously warning the user.
This patch forces an error in this case to make it clear the request
cannot really be satisfied.
Behavior with paranoid 1:
$ sudo bash -c "echo 1 > /proc/sys/kernel/perf_event_paranoid"
$ perf stat -e cycles:k sleep 1
Performance counter stats for 'sleep 1':
1,520,413 cycles:k
1.002361664 seconds time elapsed
0.002480000 seconds user
0.000000000 seconds sys
Old behavior with paranoid 2:
$ sudo bash -c "echo 2 > /proc/sys/kernel/perf_event_paranoid"
$ perf stat -e cycles:k sleep 1
Performance counter stats for 'sleep 1':
0 cycles:ku
1.002358127 seconds time elapsed
0.002384000 seconds user
0.000000000 seconds sys
New behavior with paranoid 2:
$ sudo bash -c "echo 2 > /proc/sys/kernel/perf_event_paranoid"
$ perf stat -e cycles:k sleep 1
Error:
You may not have permission to collect stats.
Consider tweaking /proc/sys/kernel/perf_event_paranoid,
which controls use of the performance events system by
unprivileged users (without CAP_PERFMON or CAP_SYS_ADMIN).
The current value is 2:
-1: Allow use of (almost) all events by all users
Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK
>= 0: Disallow ftrace function tracepoint by users without CAP_PERFMON or CAP_SYS_ADMIN
Disallow raw tracepoint access by users without CAP_SYS_PERFMON or CAP_SYS_ADMIN
>= 1: Disallow CPU event access by users without CAP_PERFMON or CAP_SYS_ADMIN
>= 2: Disallow kernel profiling by users without CAP_PERFMON or CAP_SYS_ADMIN
To make this setting permanent, edit /etc/sysctl.conf too, e.g.:
kernel.perf_event_paranoid = -1
v2 of this patch addresses the review feedback from jolsa@redhat.com.
Signed-off-by: Stephane Eranian <eranian@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200414161550.225588-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Adrian Hunter
|
e345997914 |
perf tools: Add support for leader-sampling with AUX area events
When AUX area events are used in sampling mode, they must be the group
leader, but the group leader is also used for leader-sampling. However,
it is not desirable to use an AUX area event as the leader for
leader-sampling, because it doesn't have any samples of its own. To support
leader-sampling with AUX area events, use the 2nd event of the group as the
"leader" for the purposes of leader-sampling.
Example:
# perf record --kcore --aux-sample -e '{intel_pt//,cycles,instructions}:S' -c 10000 uname
[ perf record: Woken up 3 times to write data ]
[ perf record: Captured and wrote 0.786 MB perf.data ]
# perf report
Samples: 380 of events 'anon group { cycles, instructions }', Event count (approx.): 3026164
Children Self Command Shared Object Symbol
+ 38.76% 42.65% 0.00% 0.00% uname [kernel.kallsyms] [k] __x86_indirect_thunk_rax
+ 35.82% 31.33% 0.00% 0.00% uname ld-2.28.so [.] _dl_start_user
+ 34.29% 29.74% 0.55% 0.47% uname ld-2.28.so [.] _dl_start
+ 33.73% 28.62% 1.60% 0.97% uname ld-2.28.so [.] dl_main
+ 33.19% 29.04% 0.52% 0.32% uname ld-2.28.so [.] _dl_sysdep_start
+ 27.83% 33.74% 0.00% 0.00% uname [kernel.kallsyms] [k] do_syscall_64
+ 26.76% 33.29% 0.00% 0.00% uname [kernel.kallsyms] [k] entry_SYSCALL_64_after_hwframe
+ 23.78% 20.33% 5.97% 5.25% uname [kernel.kallsyms] [k] page_fault
+ 23.18% 24.60% 0.00% 0.00% uname libc-2.28.so [.] __libc_start_main
+ 22.64% 24.37% 0.00% 0.00% uname uname [.] _start
+ 21.04% 23.27% 0.00% 0.00% uname uname [.] main
+ 19.48% 18.08% 3.72% 3.64% uname ld-2.28.so [.] _dl_relocate_object
+ 19.47% 21.81% 0.00% 0.00% uname libc-2.28.so [.] setlocale
+ 19.44% 21.56% 0.52% 0.61% uname libc-2.28.so [.] _nl_find_locale
+ 17.87% 19.66% 0.00% 0.00% uname libc-2.28.so [.] _nl_load_locale_from_archive
+ 15.71% 13.73% 0.53% 0.52% uname [kernel.kallsyms] [k] do_page_fault
+ 15.18% 13.21% 1.03% 0.68% uname [kernel.kallsyms] [k] handle_mm_fault
+ 14.15% 12.53% 1.01% 1.12% uname [kernel.kallsyms] [k] __handle_mm_fault
+ 12.03% 9.67% 0.54% 0.32% uname ld-2.28.so [.] _dl_map_object
+ 10.55% 8.48% 0.00% 0.00% uname ld-2.28.so [.] openaux
+ 10.55% 20.20% 0.52% 0.61% uname libc-2.28.so [.] __run_exit_handlers
Comnmitter notes:
Fixed up this problem:
util/record.c: In function ‘perf_evlist__config’:
util/record.c:256:3: error: too few arguments to function ‘perf_evsel__config_leader_sampling’
256 | perf_evsel__config_leader_sampling(evsel);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
util/record.c:190:13: note: declared here
190 | static void perf_evsel__config_leader_sampling(struct evsel *evsel,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200401101613.6201-17-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Adrian Hunter
|
94d3820f2e |
perf evlist: Allow multiple read formats
Tools find the correct evsel, and therefore read format, using the event ID, so it isn't necessary for all read formats to be the same. In the case of leader-sampling of AUX area events, dummy tracking events will have a different read format, so relax the validation to become a debug message only. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-16-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
3713eb371c |
perf evsel: Rearrange perf_evsel__config_leader_sampling()
In preparation for adding support for leader sampling with AUX area events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-15-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
5f34278867 |
perf evlist: Move leader-sampling configuration
Move leader-sampling configuration in preparation for adding support for
leader sampling with AUX area events.
Committer notes:
It only makes sense when configuring an evsel that is part of an evlist,
so the only case where it is called outside perf_evlist__config(), in
some 'perf test' entry, is safe, and even there we should just use
perf_evlist__config(), but since in that case we have just one evsel in
the evlist, it is equivalent.
Also fixed up this problem:
util/record.c: In function ‘perf_evlist__config’:
util/record.c:223:3: error: too many arguments to function ‘perf_evsel__config_leader_sampling’
223 | perf_evsel__config_leader_sampling(evsel, evlist);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
util/record.c:170:13: note: declared here
170 | static void perf_evsel__config_leader_sampling(struct evsel *evsel)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200401101613.6201-14-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Adrian Hunter
|
e12ee9f751 |
perf evsel: Move and globalize perf_evsel__find_pmu() and perf_evsel__is_aux_event()
Move and globalize 2 functions from the auxtrace specific sources so that they can be reused. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-13-adrian.hunter@intel.com [ Move to pmu.c, as moving to evsel.h breaks the python binding ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
2855c05cf1 |
perf intel-pt: Add support for synthesizing callchains for regular events
Currently, callchains can be synthesized only for synthesized events.
Support also synthesizing callchains for regular events.
Example:
# perf record --kcore --aux-sample -e '{intel_pt//,cycles}' -c 10000 uname
Linux
[ perf record: Woken up 3 times to write data ]
[ perf record: Captured and wrote 0.532 MB perf.data ]
# perf script --itrace=Ge | head -20
uname 4864 2419025.358181: 10000 cycles:
ffffffffbba56965 apparmor_bprm_committing_creds+0x35 ([kernel.kallsyms])
ffffffffbc400cd5 __indirect_thunk_start+0x5 ([kernel.kallsyms])
ffffffffbba07422 security_bprm_committing_creds+0x22 ([kernel.kallsyms])
ffffffffbb89805d install_exec_creds+0xd ([kernel.kallsyms])
ffffffffbb90d9ac load_elf_binary+0x3ac ([kernel.kallsyms])
uname 4864 2419025.358185: 10000 cycles:
ffffffffbba56db0 apparmor_bprm_committed_creds+0x20 ([kernel.kallsyms])
ffffffffbc400cd5 __indirect_thunk_start+0x5 ([kernel.kallsyms])
ffffffffbba07452 security_bprm_committed_creds+0x22 ([kernel.kallsyms])
ffffffffbb89809a install_exec_creds+0x4a ([kernel.kallsyms])
ffffffffbb90d9ac load_elf_binary+0x3ac ([kernel.kallsyms])
uname 4864 2419025.358189: 10000 cycles:
ffffffffbb86fdf6 vma_adjust_trans_huge+0x6 ([kernel.kallsyms])
ffffffffbb821660 __vma_adjust+0x160 ([kernel.kallsyms])
ffffffffbb897be7 shift_arg_pages+0x97 ([kernel.kallsyms])
ffffffffbb897ed9 setup_arg_pages+0x1e9 ([kernel.kallsyms])
ffffffffbb90d9f2 load_elf_binary+0x3f2 ([kernel.kallsyms])
Committer testing:
# perf record --kcore --aux-sample -e '{intel_pt//,cycles}' -c 10000 uname
Linux
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.233 MB perf.data ]
#
Then, before this patch:
# perf script --itrace=Ge | head -20
uname 28642 168664.856384: 10000 cycles: ffffffff9810aeaa commit_creds+0x2a ([kernel.kallsyms])
uname 28642 168664.856388: 10000 cycles: ffffffff982a24f1 mprotect_fixup+0x151 ([kernel.kallsyms])
uname 28642 168664.856392: 10000 cycles: ffffffff982a385b move_page_tables+0xbcb ([kernel.kallsyms])
uname 28642 168664.856396: 10000 cycles: ffffffff982fd4ec __mod_memcg_state+0x1c ([kernel.kallsyms])
uname 28642 168664.856400: 10000 cycles: ffffffff9829fddd do_mmap+0xfd ([kernel.kallsyms])
uname 28642 168664.856404: 10000 cycles: ffffffff9829c879 __vma_adjust+0x479 ([kernel.kallsyms])
uname 28642 168664.856408: 10000 cycles: ffffffff98238e94 __perf_addr_filters_adjust+0x34 ([kernel.kallsyms])
uname 28642 168664.856412: 10000 cycles: ffffffff98a38e0b down_write+0x1b ([kernel.kallsyms])
uname 28642 168664.856416: 10000 cycles: ffffffff983006a0 memcg_kmem_get_cache+0x0 ([kernel.kallsyms])
uname 28642 168664.856421: 10000 cycles: ffffffff98396eaf load_elf_binary+0x92f ([kernel.kallsyms])
uname 28642 168664.856425: 10000 cycles: ffffffff982e0222 kfree+0x62 ([kernel.kallsyms])
uname 28642 168664.856428: 10000 cycles: ffffffff9846dfd4 file_has_perm+0x54 ([kernel.kallsyms])
uname 28642 168664.856433: 10000 cycles: ffffffff98288911 vma_interval_tree_insert+0x51 ([kernel.kallsyms])
uname 28642 168664.856437: 10000 cycles: ffffffff9823e577 perf_event_mmap_output+0x27 ([kernel.kallsyms])
uname 28642 168664.856441: 10000 cycles: ffffffff98a26fa0 xas_load+0x40 ([kernel.kallsyms])
uname 28642 168664.856445: 10000 cycles: ffffffff98004f30 arch_setup_additional_pages+0x0 ([kernel.kallsyms])
uname 28642 168664.856448: 10000 cycles: ffffffff98a297c0 copy_user_generic_unrolled+0xa0 ([kernel.kallsyms])
uname 28642 168664.856452: 10000 cycles: ffffffff9853a87a strnlen_user+0x10a ([kernel.kallsyms])
uname 28642 168664.856456: 10000 cycles: ffffffff986638a7 randomize_page+0x27 ([kernel.kallsyms])
uname 28642 168664.856460: 10000 cycles: ffffffff98a3b645 _raw_spin_lock+0x5 ([kernel.kallsyms])
#
And after:
# perf script --itrace=Ge | head -20
uname 28642 168664.856384: 10000 cycles:
ffffffff9810aeaa commit_creds+0x2a ([kernel.kallsyms])
ffffffff9831fe87 install_exec_creds+0x17 ([kernel.kallsyms])
ffffffff983968d9 load_elf_binary+0x359 ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
uname 28642 168664.856388: 10000 cycles:
ffffffff982a24f1 mprotect_fixup+0x151 ([kernel.kallsyms])
ffffffff9831fa83 setup_arg_pages+0x123 ([kernel.kallsyms])
ffffffff9839691f load_elf_binary+0x39f ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
uname 28642 168664.856392: 10000 cycles:
ffffffff982a385b move_page_tables+0xbcb ([kernel.kallsyms])
ffffffff9831f889 shift_arg_pages+0xa9 ([kernel.kallsyms])
ffffffff9831fb4f setup_arg_pages+0x1ef ([kernel.kallsyms])
ffffffff9839691f load_elf_binary+0x39f ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
#
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200401101613.6201-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Adrian Hunter
|
e11869a065 |
perf evsel: Add support for synthesized sample type
For reporting purposes, an evsel sample can have a callchain synthesized from AUX area data. Add support for keeping track of synthesized sample types. Note, the recorded sample_type cannot be changed because it is needed to continue to parse events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-11-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
8e94b3243a |
perf evsel: Be consistent when looking which evsel PERF_SAMPLE_ bits are set
Using 'type' variable for checking for callchains is equivalent to using evsel__has_callchain(evsel) and is how the other PERF_SAMPLE_ bits are checked in this function, so use it to be consistent. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-11-adrian.hunter@intel.com [ split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
4fef41bfb1 |
perf thread-stack: Add thread_stack__sample_late()
Add a thread stack function to create a call chain for hardware events where the sample records get created some time after the event occurred. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-10-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
1c5c25b3fd |
perf auxtrace: Add an option to synthesize callchains for regular events
Currently, callchains can be synthesized only for synthesized events. Add an itrace option to synthesize callchains for regular events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-9-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
5c7bec0c9c |
perf auxtrace: For reporting purposes, un-group AUX area event
An AUX area event must be the group leader when recording traces in
sample mode, but that does not produce the expected results from
'perf report' because it expects the leader to provide samples.
Rather than teach 'perf report' about AUX area sampling, un-group the
AUX area event during processing, making the 2nd event the leader.
Example:
$ perf record -e '{intel_pt//u,branch-misses:u}' -c 1 uname
Linux
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.080 MB perf.data ]
Before:
$ perf report
Samples: 800 of events 'anon group { intel_pt//u, branch-misses:u }', Event count (approx.): 800
Children Self Command Shared Object Symbol
0.00% 47.50% 0.00% 47.50% uname libc-2.28.so [.] _dl_addr
0.00% 16.38% 0.00% 16.38% uname ld-2.28.so [.] __GI___tunables_init
0.00% 54.75% 0.00% 4.75% uname ld-2.28.so [.] dl_main
0.00% 3.12% 0.00% 3.12% uname ld-2.28.so [.] _dl_map_object_from_fd
0.00% 2.38% 0.00% 2.38% uname ld-2.28.so [.] strcmp
0.00% 2.25% 0.00% 2.25% uname ld-2.28.so [.] _dl_check_map_versions
0.00% 2.00% 0.00% 2.00% uname ld-2.28.so [.] _dl_important_hwcaps
0.00% 2.00% 0.00% 2.00% uname ld-2.28.so [.] _dl_map_object_deps
0.00% 51.50% 0.00% 1.50% uname ld-2.28.so [.] _dl_sysdep_start
0.00% 1.25% 0.00% 1.25% uname ld-2.28.so [.] _dl_load_cache_lookup
0.00% 51.12% 0.00% 1.12% uname ld-2.28.so [.] _dl_start
0.00% 50.88% 0.00% 1.12% uname ld-2.28.so [.] do_lookup_x
0.00% 50.62% 0.00% 1.00% uname ld-2.28.so [.] _dl_lookup_symbol_x
0.00% 1.00% 0.00% 1.00% uname ld-2.28.so [.] _dl_map_object
0.00% 1.00% 0.00% 1.00% uname ld-2.28.so [.] _dl_next_ld_env_entry
0.00% 0.88% 0.00% 0.88% uname ld-2.28.so [.] _dl_cache_libcmp
0.00% 0.88% 0.00% 0.88% uname ld-2.28.so [.] _dl_new_object
0.00% 50.88% 0.00% 0.88% uname ld-2.28.so [.] _dl_relocate_object
0.00% 0.62% 0.00% 0.62% uname ld-2.28.so [.] _dl_init_paths
0.00% 0.62% 0.00% 0.62% uname ld-2.28.so [.] _dl_name_match_p
0.00% 0.50% 0.00% 0.50% uname ld-2.28.so [.] get_common_indeces.constprop.1
0.00% 0.50% 0.00% 0.50% uname ld-2.28.so [.] memmove
0.00% 0.50% 0.00% 0.50% uname ld-2.28.so [.] memset
0.00% 0.50% 0.00% 0.50% uname ld-2.28.so [.] open_verify.constprop.11
0.00% 0.38% 0.00% 0.38% uname ld-2.28.so [.] _dl_check_all_versions
0.00% 0.38% 0.00% 0.38% uname ld-2.28.so [.] _dl_find_dso_for_object
0.00% 0.38% 0.00% 0.38% uname ld-2.28.so [.] init_tls
0.00% 0.25% 0.00% 0.25% uname ld-2.28.so [.] __tunable_get_val
0.00% 0.25% 0.00% 0.25% uname ld-2.28.so [.] _dl_add_to_namespace_list
0.00% 0.25% 0.00% 0.25% uname ld-2.28.so [.] _dl_determine_tlsoffset
0.00% 0.25% 0.00% 0.25% uname ld-2.28.so [.] _dl_discover_osversion
0.00% 0.25% 0.00% 0.25% uname ld-2.28.so [.] calloc@plt
0.00% 0.25% 0.00% 0.25% uname ld-2.28.so [.] malloc
0.00% 0.25% 0.00% 0.25% uname ld-2.28.so [.] malloc@plt
0.00% 0.25% 0.00% 0.25% uname libc-2.28.so [.] _nl_load_locale_from_archive
0.00% 0.25% 0.00% 0.25% uname [unknown] [k] 0xffffffffa3a00010
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] __libc_scratch_buffer_set_array_size
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] _dl_allocate_tls_storage
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] _dl_catch_exception
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] _dl_setup_hash
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] _dl_sort_maps
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] _dl_sysdep_read_whole_file
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] access
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] calloc
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] mmap64
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] openaux
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] rtld_lock_default_lock_recursive
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] rtld_lock_default_unlock_recursive
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] strchr
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] strlen
0.00% 0.12% 0.00% 0.12% uname ld-2.28.so [.] 0x0000000000001080
0.00% 0.12% 0.00% 0.12% uname libc-2.28.so [.] __strchrnul_avx2
0.00% 0.12% 0.00% 0.12% uname libc-2.28.so [.] _nl_normalize_codeset
0.00% 0.12% 0.00% 0.12% uname libc-2.28.so [.] malloc
0.00% 0.12% 0.00% 0.12% uname [unknown] [k] 0xffffffffa3a011f0
0.00% 50.00% 0.00% 0.00% uname ld-2.28.so [.] _dl_start_user
0.00% 50.00% 0.00% 0.00% uname [unknown] [.] 0000000000000000
After:
Samples: 800 of event 'branch-misses:u', Event count (approx.): 800
Children Self Command Shared Object Symbol
54.75% 4.75% uname ld-2.28.so [.] dl_main
51.50% 1.50% uname ld-2.28.so [.] _dl_sysdep_start
51.12% 1.12% uname ld-2.28.so [.] _dl_start
50.88% 0.88% uname ld-2.28.so [.] _dl_relocate_object
50.88% 1.12% uname ld-2.28.so [.] do_lookup_x
50.62% 1.00% uname ld-2.28.so [.] _dl_lookup_symbol_x
50.00% 0.00% uname ld-2.28.so [.] _dl_start_user
50.00% 0.00% uname [unknown] [.] 0000000000000000
47.50% 47.50% uname libc-2.28.so [.] _dl_addr
16.38% 16.38% uname ld-2.28.so [.] __GI___tunables_init
3.12% 3.12% uname ld-2.28.so [.] _dl_map_object_from_fd
2.38% 2.38% uname ld-2.28.so [.] strcmp
2.25% 2.25% uname ld-2.28.so [.] _dl_check_map_versions
2.00% 2.00% uname ld-2.28.so [.] _dl_important_hwcaps
2.00% 2.00% uname ld-2.28.so [.] _dl_map_object_deps
1.25% 1.25% uname ld-2.28.so [.] _dl_load_cache_lookup
1.00% 1.00% uname ld-2.28.so [.] _dl_map_object
1.00% 1.00% uname ld-2.28.so [.] _dl_next_ld_env_entry
0.88% 0.88% uname ld-2.28.so [.] _dl_cache_libcmp
0.88% 0.88% uname ld-2.28.so [.] _dl_new_object
0.62% 0.62% uname ld-2.28.so [.] _dl_init_paths
0.62% 0.62% uname ld-2.28.so [.] _dl_name_match_p
0.50% 0.50% uname ld-2.28.so [.] get_common_indeces.constprop.1
0.50% 0.50% uname ld-2.28.so [.] memmove
0.50% 0.50% uname ld-2.28.so [.] memset
0.50% 0.50% uname ld-2.28.so [.] open_verify.constprop.11
0.38% 0.38% uname ld-2.28.so [.] _dl_check_all_versions
0.38% 0.38% uname ld-2.28.so [.] _dl_find_dso_for_object
0.38% 0.38% uname ld-2.28.so [.] init_tls
0.25% 0.25% uname ld-2.28.so [.] __tunable_get_val
0.25% 0.25% uname ld-2.28.so [.] _dl_add_to_namespace_list
0.25% 0.25% uname ld-2.28.so [.] _dl_determine_tlsoffset
0.25% 0.25% uname ld-2.28.so [.] _dl_discover_osversion
0.25% 0.25% uname ld-2.28.so [.] calloc@plt
0.25% 0.25% uname ld-2.28.so [.] malloc
0.25% 0.25% uname ld-2.28.so [.] malloc@plt
0.25% 0.25% uname libc-2.28.so [.] _nl_load_locale_from_archive
0.25% 0.25% uname [unknown] [k] 0xffffffffa3a00010
0.12% 0.12% uname ld-2.28.so [.] __libc_scratch_buffer_set_array_size
0.12% 0.12% uname ld-2.28.so [.] _dl_allocate_tls_storage
0.12% 0.12% uname ld-2.28.so [.] _dl_catch_exception
0.12% 0.12% uname ld-2.28.so [.] _dl_setup_hash
0.12% 0.12% uname ld-2.28.so [.] _dl_sort_maps
0.12% 0.12% uname ld-2.28.so [.] _dl_sysdep_read_whole_file
0.12% 0.12% uname ld-2.28.so [.] access
0.12% 0.12% uname ld-2.28.so [.] calloc
0.12% 0.12% uname ld-2.28.so [.] mmap64
0.12% 0.12% uname ld-2.28.so [.] openaux
0.12% 0.12% uname ld-2.28.so [.] rtld_lock_default_lock_recursive
0.12% 0.12% uname ld-2.28.so [.] rtld_lock_default_unlock_recursive
0.12% 0.12% uname ld-2.28.so [.] strchr
0.12% 0.12% uname ld-2.28.so [.] strlen
0.12% 0.12% uname ld-2.28.so [.] 0x0000000000001080
0.12% 0.12% uname libc-2.28.so [.] __strchrnul_avx2
0.12% 0.12% uname libc-2.28.so [.] _nl_normalize_codeset
0.12% 0.12% uname libc-2.28.so [.] malloc
0.12% 0.12% uname [unknown] [k] 0xffffffffa3a011f0
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200401101613.6201-8-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Adrian Hunter
|
113fcb46cf |
perf s390-cpumsf: Implement ->evsel_is_auxtrace() callback
Implement ->evsel_is_auxtrace() callback. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Thomas Richter <tmricht@linux.ibm.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-7-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
a58ab57caa |
perf cs-etm: Implement ->evsel_is_auxtrace() callback
Implement ->evsel_is_auxtrace() callback. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
508c71e3f9 |
perf arm-spe: Implement ->evsel_is_auxtrace() callback
Implement ->evsel_is_auxtrace() callback. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Leo Yan <leo.yan@linaro.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kim Phillips <kim.phillips@arm.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-5-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
966246f597 |
perf intel-bts: Implement ->evsel_is_auxtrace() callback
Implement ->evsel_is_auxtrace() callback. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-4-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
6b52bb07c3 |
perf intel-pt: Implement ->evsel_is_auxtrace() callback
Implement ->evsel_is_auxtrace() callback. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-3-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
853f37d75c |
perf auxtrace: Add ->evsel_is_auxtrace() callback
Add ->evsel_is_auxtrace() callback to identify if a selected event is an AUX area event. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kim Phillips <kim.phillips@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Link: http://lore.kernel.org/lkml/20200401101613.6201-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Andreas Gerstmayr
|
5287f92692 |
perf script: Add flamegraph.py script
This script works in tandem with d3-flame-graph to generate flame graphs
from perf. It supports two output formats: JSON and HTML (the default).
The HTML format will look for a standalone d3-flame-graph template file
in /usr/share/d3-flame-graph/d3-flamegraph-base.html and fill in the
collected stacks.
Usage:
perf record -a -g -F 99 sleep 60
perf script report flamegraph
Combined:
perf script flamegraph -a -F 99 sleep 60
Committer testing:
Tested both with "PYTHON=python3" and with the default, that uses
python2-devel:
Complete set of instructions:
$ mkdir /tmp/build/perf
$ make PYTHON=python3 -C tools/perf O=/tmp/build/perf install-bin
$ export PATH=~/bin:$PATH
$ perf record -a -g -F 99 sleep 60
$ perf script report flamegraph
Now go and open the generated flamegraph.html file in a browser.
At first this required building with PYTHON=python3, but after I
reported this Andreas was kind enough to send a patch making it work
with both python and python3.
Signed-off-by: Andreas Gerstmayr <agerstmayr@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Brendan Gregg <bgregg@netflix.com>
Cc: Martin Spier <mspier@netflix.com>
Link: http://lore.kernel.org/lkml/20200320151355.66302-1-agerstmayr@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Kajol Jain
|
47352aba40 |
perf metrictroup: Split the metricgroup__add_metric function
This patch refactors metricgroup__add_metric function where some part of it move to function metricgroup__add_metric_param. No logic change. Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Anju T Sudhakar <anju@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Joe Mario <jmario@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lore.kernel.org/lkml/20200401203340.31402-4-kjain@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Jiri Olsa
|
871f9f599d |
perf expr: Add expr_scanner_ctx object
Add the expr_scanner_ctx object to hold user data for the expr scanner. Currently it holds only start_token, Kajol Jain will use it to hold 24x7 runtime param. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Anju T Sudhakar <anju@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Joe Mario <jmario@redhat.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lore.kernel.org/lkml/20200401203340.31402-3-kjain@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jiri Olsa
|
aecce63e2b |
perf expr: Add expr_ prefix for parse_ctx and parse_id
Adding expr_ prefix for parse_ctx and parse_id, to straighten out the expr* namespace. There's no functional change. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Anju T Sudhakar <anju@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Joe Mario <jmario@redhat.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lore.kernel.org/lkml/20200401203340.31402-2-kjain@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ian Rogers
|
04ed4ccb9c |
perf synthetic-events: save 4kb from 2 stack frames
Reuse an existing char buffer to avoid two PATH_MAX sized char buffers. Reduces stack frame sizes by 4kb. perf_event__synthesize_mmap_events before 'sub $0x45b8,%rsp' after 'sub $0x35b8,%rsp'. perf_event__get_comm_ids before 'sub $0x2028,%rsp' after 'sub $0x1028,%rsp'. The performance impact of this change is negligible. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrey Zhizhikin <andrey.z@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lore.kernel.org/lkml/20200402154357.107873-4-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ian Rogers
|
2a4b51666a |
perf bench: Add event synthesis benchmark
Event synthesis may occur at the start or end (tail) of a perf command. In system-wide mode it can scan every process in /proc, which may add seconds of latency before event recording. Add a new benchmark that times how long event synthesis takes with and without data synthesis. An example execution looks like: $ perf bench internals synthesize # Running 'internals/synthesize' benchmark: Average synthesis took: 168.253800 usec Average data synthesis took: 208.104700 usec Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrey Zhizhikin <andrey.z@gmail.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lore.kernel.org/lkml/20200402154357.107873-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
1a2725f3ee |
perf script: Simplify auxiliary event printing functions
This simplifies the print functions for the following perf script options: --show-task-events --show-namespace-events --show-cgroup-events --show-mmap-events --show-switch-events --show-lost-events --show-bpf-events Example: # perf record --switch-events -a -e cycles -c 10000 sleep 1 Before: # perf script --show-task-events --show-namespace-events --show-cgroup-events --show-mmap-events --show-switch-events --show-lost-events --show-bpf-events > out-before.txt After: # perf script --show-task-events --show-namespace-events --show-cgroup-events --show-mmap-events --show-switch-events --show-lost-events --show-bpf-events > out-after.txt # diff -s out-before.txt out-after.txt Files out-before.txt and out-after.tx are identical Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200402141548.21283-1-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Alexey Budankov
|
6b3e0e2e04 |
perf tools: Support CAP_PERFMON capability
Extend error messages to mention CAP_PERFMON capability as an option to
substitute CAP_SYS_ADMIN capability for secure system performance
monitoring and observability operations. Make
perf_event_paranoid_check() and __cmd_ftrace() to be aware of
CAP_PERFMON capability.
CAP_PERFMON implements the principle of least privilege for performance
monitoring and observability operations (POSIX IEEE 1003.1e 2.2.2.39
principle of least privilege: A security design principle that states
that a process or program be granted only those privileges (e.g.,
capabilities) necessary to accomplish its legitimate function, and only
for the time that such privileges are actually required)
For backward compatibility reasons access to perf_events subsystem remains
open for CAP_SYS_ADMIN privileged processes but CAP_SYS_ADMIN usage for
secure perf_events monitoring is discouraged with respect to CAP_PERFMON
capability.
Committer testing:
Using a libcap with this patch:
diff --git a/libcap/include/uapi/linux/capability.h b/libcap/include/uapi/linux/capability.h
index 78b2fd4c8a95..89b5b0279b60 100644
--- a/libcap/include/uapi/linux/capability.h
+++ b/libcap/include/uapi/linux/capability.h
@@ -366,8 +366,9 @@ struct vfs_ns_cap_data {
#define CAP_AUDIT_READ 37
+#define CAP_PERFMON 38
-#define CAP_LAST_CAP CAP_AUDIT_READ
+#define CAP_LAST_CAP CAP_PERFMON
#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)
Note that using '38' in place of 'cap_perfmon' works to some degree with
an old libcap, its only when cap_get_flag() is called that libcap
performs an error check based on the maximum value known for
capabilities that it will fail.
This makes determining the default of perf_event_attr.exclude_kernel to
fail, as it can't determine if CAP_PERFMON is in place.
Using 'perf top -e cycles' avoids the default check and sets
perf_event_attr.exclude_kernel to 1.
As root, with a libcap supporting CAP_PERFMON:
# groupadd perf_users
# adduser perf -g perf_users
# mkdir ~perf/bin
# cp ~acme/bin/perf ~perf/bin/
# chgrp perf_users ~perf/bin/perf
# setcap "cap_perfmon,cap_sys_ptrace,cap_syslog=ep" ~perf/bin/perf
# getcap ~perf/bin/perf
/home/perf/bin/perf = cap_sys_ptrace,cap_syslog,cap_perfmon+ep
# ls -la ~perf/bin/perf
-rwxr-xr-x. 1 root perf_users 16968552 Apr 9 13:10 /home/perf/bin/perf
As the 'perf' user in the 'perf_users' group:
$ perf top -a --stdio
Error:
Failed to mmap with 1 (Operation not permitted)
$
Either add the cap_ipc_lock capability to the perf binary or reduce the
ring buffer size to some smaller value:
$ perf top -m10 -a --stdio
rounding mmap pages size to 64K (16 pages)
Error:
Failed to mmap with 1 (Operation not permitted)
$ perf top -m4 -a --stdio
Error:
Failed to mmap with 1 (Operation not permitted)
$ perf top -m2 -a --stdio
PerfTop: 762 irqs/sec kernel:49.7% exact: 100.0% lost: 0/0 drop: 0/0 [4000Hz cycles], (all, 4 CPUs)
------------------------------------------------------------------------------------------------------
9.83% perf [.] __symbols__insert
8.58% perf [.] rb_next
5.91% [kernel] [k] module_get_kallsym
5.66% [kernel] [k] kallsyms_expand_symbol.constprop.0
3.98% libc-2.29.so [.] __GI_____strtoull_l_internal
3.66% perf [.] rb_insert_color
2.34% [kernel] [k] vsnprintf
2.30% [kernel] [k] string_nocheck
2.16% libc-2.29.so [.] _IO_getdelim
2.15% [kernel] [k] number
2.13% [kernel] [k] format_decode
1.58% libc-2.29.so [.] _IO_feof
1.52% libc-2.29.so [.] __strcmp_avx2
1.50% perf [.] rb_set_parent_color
1.47% libc-2.29.so [.] __libc_calloc
1.24% [kernel] [k] do_syscall_64
1.17% [kernel] [k] __x86_indirect_thunk_rax
$ perf record -a sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.552 MB perf.data (74 samples) ]
$ perf evlist
cycles
$ perf evlist -v
cycles: size: 120, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1
$ perf report | head -20
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 74 of event 'cycles'
# Event count (approx.): 15694834
#
# Overhead Command Shared Object Symbol
# ........ ............... .......................... ......................................
#
19.62% perf [kernel.vmlinux] [k] strnlen_user
13.88% swapper [kernel.vmlinux] [k] intel_idle
13.83% ksoftirqd/0 [kernel.vmlinux] [k] pfifo_fast_dequeue
13.51% swapper [kernel.vmlinux] [k] kmem_cache_free
6.31% gnome-shell [kernel.vmlinux] [k] kmem_cache_free
5.66% kworker/u8:3+ix [kernel.vmlinux] [k] delay_tsc
4.42% perf [kernel.vmlinux] [k] __set_cpus_allowed_ptr
3.45% kworker/2:1-eve [kernel.vmlinux] [k] shmem_truncate_range
2.29% gnome-shell libgobject-2.0.so.0.6000.7 [.] g_closure_ref
$
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Igor Lubashev <ilubashe@akamai.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Serge Hallyn <serge@hallyn.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: intel-gfx@lists.freedesktop.org
Cc: linux-doc@vger.kernel.org
Cc: linux-man@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
Cc: selinux@vger.kernel.org
Link: http://lore.kernel.org/lkml/a66d5648-2b8e-577e-e1f2-1d56c017ab5e@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Jiri Olsa
|
3c29d4483e |
perf annotate: Add basic support for bpf_image
Add the DSO_BINARY_TYPE__BPF_IMAGE dso binary type to recognize BPF
images that carry trampoline or dispatcher.
Upcoming patches will add support to read the image data, store it
within the BPF feature in perf.data and display it for annotation
purposes.
Currently we only display following message:
# ./perf annotate bpf_trampoline_24456 --stdio
Percent | Source code & Disassembly of . for cycles (504 ...
--------------------------------------------------------------- ...
: to be implemented
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Björn Töpel <bjorn.topel@intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David S. Miller <davem@redhat.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200312195610.346362-16-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Jiri Olsa
|
7eddf7e74e |
perf machine: Set ksymbol dso as loaded on arrival
There's no special load action for ksymbol data on map__load/dso__load action, where the kernel is getting loaded. It only gets confused with kernel kallsyms/vmlinux load for bpf object, which fails and could mess up with the map. Disabling any further load of the map for ksymbol related dso/map. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrii Nakryiko <andriin@fb.com> Cc: Björn Töpel <bjorn.topel@intel.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David S. Miller <davem@redhat.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Jesper Dangaard Brouer <hawk@kernel.org> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200312195610.346362-15-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jiri Olsa
|
943930e472 |
perf tools: Synthesize bpf_trampoline/dispatcher ksymbol event
Synthesize bpf images (trampolines/dispatchers) on start, as ksymbol
events from /proc/kallsyms. Having this perf can recognize samples from
those images and perf report and top shows them correctly.
The rest of the ksymbol handling is already in place from for the bpf
programs monitoring, so only the initial state was needed.
perf report output:
# Overhead Command Shared Object Symbol
12.37% test_progs [kernel.vmlinux] [k] entry_SYSCALL_64
11.80% test_progs [kernel.vmlinux] [k] syscall_return_via_sysret
9.63% test_progs bpf_prog_bcf7977d3b93787c_prog2 [k] bpf_prog_bcf7977d3b93787c_prog2
6.90% test_progs bpf_trampoline_24456 [k] bpf_trampoline_24456
6.36% test_progs [kernel.vmlinux] [k] memcpy_erms
Committer notes:
Use scnprintf() instead of strncpy() to overcome this on fedora:32,
rawhide and OpenMandriva Cooker:
CC /tmp/build/perf/util/bpf-event.o
In file included from /usr/include/string.h:495,
from /git/linux/tools/lib/bpf/libbpf_common.h:12,
from /git/linux/tools/lib/bpf/bpf.h:31,
from util/bpf-event.c:4:
In function 'strncpy',
inlined from 'process_bpf_image' at util/bpf-event.c:323:2,
inlined from 'kallsyms_process_symbol' at util/bpf-event.c:358:9:
/usr/include/bits/string_fortified.h:106:10: error: '__builtin_strncpy' specified bound 256 equals destination size [-Werror=stringop-truncation]
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Björn Töpel <bjorn.topel@intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David S. Miller <davem@redhat.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200312195610.346362-14-jolsa@kernel.org/
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Arnaldo Carvalho de Melo
|
cfbd41b786 |
perf stat: Honour --timeout for forked workloads
When --timeout is used and a workload is specified to be started by
'perf stat', i.e.
$ perf stat --timeout 1000 sleep 1h
The --timeout wasn't being honoured, i.e. the workload, 'sleep 1h' in
the above example, should be terminated after 1000ms, but it wasn't,
'perf stat' was waiting for it to finish.
Fix it by sending a SIGTERM when the timeout expires.
Now it works:
# perf stat -e cycles --timeout 1234 sleep 1h
sleep: Terminated
Performance counter stats for 'sleep 1h':
1,066,692 cycles
1.234314838 seconds time elapsed
0.000750000 seconds user
0.000000000 seconds sys
#
Fixes:
|
||
|
Arnaldo Carvalho de Melo
|
e3698b23ec |
tools headers: Synchronize linux/bits.h with the kernel sources
To pick up the changes in these csets: |
||
|
Arnaldo Carvalho de Melo
|
d8ed4d7aeb |
tools headers: Update x86's syscall_64.tbl with the kernel sources
To pick the changes from: |
||
|
Arnaldo Carvalho de Melo
|
f60b3878f4 |
tools headers UAPI: Sync linux/mman.h with the kernel
To get the changes in:
|
||
|
Arnaldo Carvalho de Melo
|
027fa8fb63 |
tools headers UAPI: Sync sched.h with the kernel
To get the changes in:
|
||
|
Arnaldo Carvalho de Melo
|
ca64d84e93 |
tools headers: Update linux/vdso.h and grab a copy of vdso/const.h
To get in line with:
|
||
|
Jin Yao
|
8358f698ec |
perf stat: Fix no metric header if --per-socket and --metric-only set
We received a report that was no metric header displayed if --per-socket
and --metric-only were both set.
It's hard for script to parse the perf-stat output. This patch fixes this
issue.
Before:
root@kbl-ppc:~# perf stat -a -M CPI --metric-only --per-socket
^C
Performance counter stats for 'system wide':
S0 8 2.6
2.215270071 seconds time elapsed
root@kbl-ppc:~# perf stat -a -M CPI --metric-only --per-socket -I1000
# time socket cpus
1.000411692 S0 8 2.2
2.001547952 S0 8 3.4
3.002446511 S0 8 3.4
4.003346157 S0 8 4.0
5.004245736 S0 8 0.3
After:
root@kbl-ppc:~# perf stat -a -M CPI --metric-only --per-socket
^C
Performance counter stats for 'system wide':
CPI
S0 8 2.1
1.813579830 seconds time elapsed
root@kbl-ppc:~# perf stat -a -M CPI --metric-only --per-socket -I1000
# time socket cpus CPI
1.000415122 S0 8 3.2
2.001630051 S0 8 2.9
3.002612278 S0 8 4.3
4.003523594 S0 8 3.0
5.004504256 S0 8 3.7
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200331180226.25915-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Arnaldo Carvalho de Melo
|
9a00df311b |
perf python: Check if clang supports -fno-semantic-interposition
The set of C compiler options used by distros to build python bindings
may include options that are unknown to clang, we check for a variety of
such options, add -fno-semantic-interposition to that mix:
This fixes the build on, among others, Manjaro Linux:
GEN /tmp/build/perf/python/perf.so
clang-9: error: unknown argument: '-fno-semantic-interposition'
error: command 'clang' failed with exit status 1
make: Leaving directory '/git/perf/tools/perf'
[perfbuilder@602aed1c266d ~]$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-pkgversion='Arch Linux 9.3.0-1' --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++,d --enable-shared --enable-threads=posix --with-system-zlib --with-isl --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object --enable-linker-build-id --enable-lto --enable-plugin --enable-install-libiberty --with-linker-hash-style=gnu --enable-gnu-indirect-function --enable-multilib --disable-werror --enable-checking=release --enable-default-pie --enable-default-ssp --enable-cet=auto gdc_include_dir=/usr/include/dlang/gdc
Thread model: posix
gcc version 9.3.0 (Arch Linux 9.3.0-1)
[perfbuilder@602aed1c266d ~]$
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
Linus Torvalds
|
c48b07226b |
perf updates all over the place:
core:
- Support for cgroup tracking in samples to allow cgroup based
analysis
tools:
- Support for cgroup analysis
- Commandline option and hotkey for perf top to change the sort order
- A set of fixes all over the place
- Various build system related improvements
- Updates of the X86 pmu event JSON data
- Documentation updates
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Merge tag 'perf-urgent-2020-04-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull more perf updates from Thomas Gleixner:
"Perf updates all over the place:
core:
- Support for cgroup tracking in samples to allow cgroup based
analysis
tools:
- Support for cgroup analysis
- Commandline option and hotkey for perf top to change the sort order
- A set of fixes all over the place
- Various build system related improvements
- Updates of the X86 pmu event JSON data
- Documentation updates"
* tag 'perf-urgent-2020-04-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (55 commits)
perf python: Fix clang detection to strip out options passed in $CC
perf tools: Support Python 3.8+ in Makefile
perf script: Fix invalid read of directory entry after closedir()
perf script report: Fix SEGFAULT when using DWARF mode
perf script: add -S/--symbols documentation
perf pmu-events x86: Use CPU_CLK_UNHALTED.THREAD in Kernel_Utilization metric
perf events parser: Add missing Intel CPU events to parser
perf script: Allow --symbol to accept hexadecimal addresses
perf report/top TUI: Fix title line formatting
perf top: Support hotkey to change sort order
perf top: Support --group-sort-idx to change the sort order
perf symbols: Fix arm64 gap between kernel start and module end
perf build-test: Honour JOBS to override detection of number of cores
perf script: Add --show-cgroup-events option
perf top: Add --all-cgroups option
perf record: Add --all-cgroups option
perf record: Support synthesizing cgroup events
perf report: Add 'cgroup' sort key
perf cgroup: Maintain cgroup hierarchy
perf tools: Basic support for CGROUP event
...
|
||
|
Linus Torvalds
|
ff2ae607c6 |
SPDX patches for 5.7-rc1.
Here are 3 SPDX patches for 5.7-rc1. One fixes up the SPDX tag for a single driver, while the other two go through the tree and add SPDX tags for all of the .gitignore files as needed. Nothing too complex, but you will get a merge conflict with your current tree, that should be trivial to handle (one file modified by two things, one file deleted.) All 3 of these have been in linux-next for a while, with no reported issues other than the merge conflict. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXodg5A8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ykySQCgy9YDrkz7nWq6v3Gohl6+lW/L+rMAnRM4uTZm m5AuCzO3Azt9KBi7NL+L =2Lm5 -----END PGP SIGNATURE----- Merge tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx Pull SPDX updates from Greg KH: "Here are three SPDX patches for 5.7-rc1. One fixes up the SPDX tag for a single driver, while the other two go through the tree and add SPDX tags for all of the .gitignore files as needed. Nothing too complex, but you will get a merge conflict with your current tree, that should be trivial to handle (one file modified by two things, one file deleted.) All three of these have been in linux-next for a while, with no reported issues other than the merge conflict" * tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx: ASoC: MT6660: make spdxcheck.py happy .gitignore: add SPDX License Identifier .gitignore: remove too obvious comments |
||
|
Arnaldo Carvalho de Melo
|
9ff76cea4e |
perf python: Fix clang detection to strip out options passed in $CC
The clang check in the python setup.py file expected $CC to be just the
name of the compiler, not the compiler + options, i.e. all options were
expected to be passed in $CFLAGS, this ends up making it fail in systems
where CC is set to, e.g.:
"aarch64-linaro-linux-gcc --sysroot=/oe/build/tmp/work/juno-linaro-linux/perf/1.0-r9/recipe-sysroot"
Like this:
$ python3
>>> from subprocess import Popen
>>> a = Popen(["aarch64-linux-gnu-gcc --sysroot=/oe/build/tmp/work/juno-linaro-linux/perf/1.0-r9/recipe-sysroot", "-v"])
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.6/subprocess.py", line 729, in __init__
restore_signals, start_new_session)
File "/usr/lib/python3.6/subprocess.py", line 1364, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'aarch64-linux-gnu-gcc --sysroot=/oe/build/tmp/work/juno-linaro-linux/perf/1.0-r9/recipe-sysroot': 'aarch64-linux-gnu-gcc --sysroot=/oe/build/tmp/work/juno-linaro-linux/perf/1.0-r9/recipe-sysroot'
>>>
Make it more robust, covering this case, by passing cc.split()[0] as the
first arg to popen().
Fixes:
|
||
Sam Lunt
|
b9c9ce4e59 |
perf tools: Support Python 3.8+ in Makefile
Python 3.8 changed the output of 'python-config --ldflags' to no longer include the '-lpythonX.Y' flag (this apparently fixed an issue loading modules with a statically linked Python executable). The libpython feature check in linux/build/feature fails if the Python library is not included in FEATURE_CHECK_LDFLAGS-libpython variable. This adds a check in the Makefile to determine if PYTHON_CONFIG accepts the '--embed' flag and passes that flag alongside '--ldflags' if so. tools/perf is the only place the libpython feature check is used. Signed-off-by: Sam Lunt <samuel.j.lunt@gmail.com> Tested-by: He Zhe <zhe.he@windriver.com> Link: http://lore.kernel.org/lkml/c56be2e1-8111-9dfe-8298-f7d0f9ab7431@windriver.com Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: trivial@kernel.org Cc: stable@kernel.org Link: http://lore.kernel.org/lkml/20200131181123.tmamivhq4b7uqasr@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Andreas Gerstmayr
|
27486a85cb |
perf script: Fix invalid read of directory entry after closedir()
closedir(lang_dir) frees the memory of script_dirent->d_name, which gets accessed in the next line in a call to scnprintf(). Valgrind report: Invalid read of size 1 ==413557== at 0x483CBE6: strlen (vg_replace_strmem.c:461) ==413557== by 0x4DD45FD: __vfprintf_internal (vfprintf-internal.c:1688) ==413557== by 0x4DE6679: __vsnprintf_internal (vsnprintf.c:114) ==413557== by 0x53A037: vsnprintf (stdio2.h:80) ==413557== by 0x53A037: scnprintf (vsprintf.c:21) ==413557== by 0x435202: get_script_path (builtin-script.c:3223) ==413557== Address 0x52e7313 is 1,139 bytes inside a block of size 32,816 free'd ==413557== at 0x483AA0C: free (vg_replace_malloc.c:540) ==413557== by 0x4E303C0: closedir (closedir.c:50) ==413557== by 0x4351DC: get_script_path (builtin-script.c:3222) Signed-off-by: Andreas Gerstmayr <agerstmayr@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200402124337.419456-1-agerstmayr@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Andreas Gerstmayr
|
1a4025f060 |
perf script report: Fix SEGFAULT when using DWARF mode
When running perf script report with a Python script and a callgraph in DWARF mode, intr_regs->regs can be 0 and therefore crashing the regs_map function. Added a check for this condition (same check as in builtin-script.c:595). Signed-off-by: Andreas Gerstmayr <agerstmayr@redhat.com> Tested-by: Kim Phillips <kim.phillips@amd.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Link: http://lore.kernel.org/lkml/20200402125417.422232-1-agerstmayr@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ian Rogers
|
628d736d91 |
perf script: add -S/--symbols documentation
Capture both that this option exists and that symbols can be hexadecimal addresses. Signed-off-by: Ian Rogers <irogers@google.com> Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20200402174130.140319-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jin Yao
|
8ed1faf015 |
perf pmu-events x86: Use CPU_CLK_UNHALTED.THREAD in Kernel_Utilization metric
The kernel utilization metric does multiplexing currently and is somewhat
unreliable. The problem is that it uses two instances of the fixed counter,
and the kernel has to multipleplex which causes errors. So should use
CPU_CLK_UNHALTED.THREAD instead.
Before:
# perf stat -M Kernel_Utilization -- sleep 1
Performance counter stats for 'sleep 1':
1,419,425 cpu_clk_unhalted.ref_tsc:k
<not counted> cpu_clk_unhalted.ref_tsc (0.00%)
After:
# perf stat -M Kernel_Utilization -- sleep 1
Performance counter stats for 'sleep 1':
746,688 cpu_clk_unhalted.thread:k # 0.7 Kernel_Utilization
1,088,348 cpu_clk_unhalted.thread
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200309013125.7559-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Adrian Hunter
|
47327f5667 |
perf events parser: Add missing Intel CPU events to parser
perf list expects CPU events to be parseable by name, e.g.
# perf list | grep el-capacity-read
el-capacity-read OR cpu/el-capacity-read/ [Kernel PMU event]
But the event parser does not recognize them that way, e.g.
# perf test -v "Parse event"
<SNIP>
running test 54 'cycles//u'
running test 55 'cycles:k'
running test 0 'cpu/config=10,config1,config2=3,period=1000/u'
running test 1 'cpu/config=1,name=krava/u,cpu/config=2/u'
running test 2 'cpu/config=1,call-graph=fp,time,period=100000/,cpu/config=2,call-graph=no,time=0,period=2000/'
running test 3 'cpu/name='COMPLEX_CYCLES_NAME:orig=cycles,desc=chip-clock-ticks',period=0x1,event=0x2/ukp'
-> cpu/event=0,umask=0x11/
-> cpu/event=0,umask=0x13/
-> cpu/event=0x54,umask=0x1/
failed to parse event 'el-capacity-read:u,cpu/event=el-capacity-read/u', err 1, str 'parser error'
event syntax error: 'el-capacity-read:u,cpu/event=el-capacity-read/u'
\___ parser error test child finished with 1
---- end ----
Parse event definition strings: FAILED!
This happens because the parser splits names by '-' in order to deal
with cache events. For example 'L1-dcache' is a token in
parse-events.l which is matched to 'L1-dcache-load-miss' by the
following rule:
PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT '-' PE_NAME_CACHE_OP_RESULT opt_event_config
And so there is special handling for 2-part PMU names i.e.
PE_PMU_EVENT_PRE '-' PE_PMU_EVENT_SUF sep_dc
but no handling for 3-part names, which are instead added as tokens e.g.
topdown-[a-z-]+
While it would be possible to add a rule for 3-part names, that would
not work if the first parts were also a valid PMU name e.g.
'el-capacity-read' would be matched to 'el-capacity' before the parser
reached the 3rd part.
The parser would need significant change to rationalize all this, so
instead fix for now by adding missing Intel CPU events with 3-part names
to the event parser as tokens.
Missing events were found by using:
grep -r EVENT_ATTR_STR arch/x86/events/intel/core.c
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Link: http://lore.kernel.org/lkml/90c7ae07-c568-b6d3-f9c4-d0c1528a0610@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Stephane Eranian
|
d2bedb7863 |
perf script: Allow --symbol to accept hexadecimal addresses
This patch extends the perf script --symbols option to filter on hexadecimal addresses in addition to symbol names. This makes it easier to handle cases where symbols are aliased. With this patch, it is possible to mix and match symbols and hexadecimal addresses using the --symbols option. $ perf script --symbols=noploop,0x4007a0 Signed-off-by: Stephane Eranian <eranian@google.com> Reviewed-by: Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200325220802.15039-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Arnaldo Carvalho de Melo
|
376c3c22e2 |
perf report/top TUI: Fix title line formatting
In |
||
|
Jin Yao
|
2605af0f32 |
perf top: Support hotkey to change sort order
It would be nice if we can use a hotkey in perf top browser to select a
event for sorting.
For example:
perf top --group -e cycles,instructions,cache-misses
Samples
Overhead Shared Object Symbol
40.03% 45.71% 0.03% div [.] main
20.46% 14.67% 0.21% libc-2.27.so [.] __random_r
20.01% 19.54% 0.02% libc-2.27.so [.] __random
9.68% 10.68% 0.00% div [.] compute_flag
4.32% 4.70% 0.00% libc-2.27.so [.] rand
3.84% 3.43% 0.00% div [.] rand@plt
0.05% 0.05% 2.33% libc-2.27.so [.] __strcmp_sse2_unaligned
0.04% 0.08% 2.43% perf [.] perf_hpp__is_dynamic_en
0.04% 0.02% 6.64% perf [.] rb_next
0.04% 0.01% 3.87% perf [.] dso__find_symbol
0.04% 0.04% 1.77% perf [.] sort__dso_cmp
When user press hotkey '2' (event index, starting from 0), it indicates
to sort output by the third event in group (cache-misses).
Samples
Overhead Shared Object Symbol
4.07% 1.28% 6.68% perf [.] rb_next
3.57% 3.98% 4.11% perf [.] __hists__insert_output
3.67% 11.24% 3.60% perf [.] perf_hpp__is_dynamic_e
3.67% 3.20% 3.20% perf [.] hpp__sort_overhead
0.81% 0.06% 3.01% perf [.] dso__find_symbol
1.62% 5.47% 2.51% perf [.] hists__match
2.70% 1.86% 2.47% libc-2.27.so [.] _int_malloc
0.19% 0.00% 2.29% [kernel] [k] copy_page
0.41% 0.32% 1.98% perf [.] hists__decay_entries
1.84% 3.67% 1.68% perf [.] sort__dso_cmp
0.16% 0.00% 1.63% [kernel] [k] clear_page_erms
Now the output is sorted by cache-misses.
v2:
---
Zero the history if hotkey is pressed.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200324220711.6025-2-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Jin Yao
|
df7deb2cce |
perf top: Support --group-sort-idx to change the sort order
'perf report' supports the option --group-sort-idx, which sorts the output by the event at the index n in event group. For example: perf record -e cycles,instructions,cache-misses perf report --group --group-sort-idx 2 --stdio The perf-report output is sorted by cache-misses. This patch supports --group-sort-idx in perf-top. For example: perf top --group -e cycles,instructions,cache-misses --group-sort-idx 2 The perf-top output is sorted by cache-misses. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200324220711.6025-1-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Kemeng Shi
|
78886f3ed3 |
perf symbols: Fix arm64 gap between kernel start and module end
During execution of command 'perf report' in my arm64 virtual machine,
this error message is showed:
failed to process sample
__symbol__inc_addr_samples(860): ENOMEM! sym->name=__this_module,
start=0x1477100, addr=0x147dbd8, end=0x80002000, func: 0
The error is caused with path:
cmd_report
__cmd_report
perf_session__process_events
__perf_session__process_events
ordered_events__flush
__ordered_events__flush
oe->deliver (ordered_events__deliver_event)
perf_session__deliver_event
machines__deliver_event
perf_evlist__deliver_sample
tool->sample (process_sample_event)
hist_entry_iter__add
iter->add_entry_cb(hist_iter__report_callback)
hist_entry__inc_addr_samples
symbol__inc_addr_samples
__symbol__inc_addr_samples
h = annotated_source__histogram(src, evidx) (NULL)
annotated_source__histogram failed is caused with path:
...
hist_entry__inc_addr_samples
symbol__inc_addr_samples
symbol__hists
annotated_source__alloc_histograms
src->histograms = calloc(nr_hists, sizeof_sym_hist) (failed)
Calloc failed as the symbol__size(sym) is too huge. As show in error
message: start=0x1477100, end=0x80002000, size of symbol is about 2G.
This is the same problem as 'perf annotate: Fix s390 gap between kernel
end and module start (
|
||
|
Arnaldo Carvalho de Melo
|
7b1642f2fc |
perf build-test: Honour JOBS to override detection of number of cores
When one does: $ make -C tools/perf build-test The makefile in tools/perf/tests/ will, just like the main one, detect how many cores are in the system and use it with -j. Sometimes we may need to override that, for instance, when using icecream or distcc to use multiple machines in the build process, then we need to, as with the main makefile, use: $ make JOBS=N -C tools/perf build-test Fix the tests makefile to honour that. Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lore.kernel.org/lkml/20200330130301.GA31702@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Namhyung Kim
|
160d4af97b |
perf script: Add --show-cgroup-events option
The --show-cgroup-events option is to print CGROUP events in the
output like others.
Committer testing:
[root@seventh ~]# perf record --all-cgroups --namespaces /wb/cgtest
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.039 MB perf.data (487 samples) ]
[root@seventh ~]# perf script --show-cgroup-events | grep PERF_RECORD_CGROUP -B2 -A2
swapper 0 0.000000: PERF_RECORD_CGROUP cgroup: 1 /
perf 12145 11200.440730: 1 cycles: ffffffffb900d58b __intel_pmu_enable_all.constprop.0+0x3b (/lib/modules/5.6.0-rc6-00008-gfe2413eefd7f/build/vmlinux)
perf 12145 11200.440733: 1 cycles: ffffffffb900d58b __intel_pmu_enable_all.constprop.0+0x3b (/lib/modules/5.6.0-rc6-00008-gfe2413eefd7f/build/vmlinux)
--
cgtest 12145 11200.440739: 193472 cycles: ffffffffb90f6fbc commit_creds+0x1fc (/lib/modules/5.6.0-rc6-00008-gfe2413eefd7f/build/vmlinux)
cgtest 12145 11200.440790: 2691608 cycles: 7fa2cb43019b _dl_sysdep_start+0x7cb (/usr/lib64/ld-2.29.so)
cgtest 12145 11200.440962: PERF_RECORD_CGROUP cgroup: 83 /sub
cgtest 12147 11200.441054: 1 cycles: ffffffffb900d58b __intel_pmu_enable_all.constprop.0+0x3b (/lib/modules/5.6.0-rc6-00008-gfe2413eefd7f/build/vmlinux)
cgtest 12147 11200.441057: 1 cycles: ffffffffb900d58b __intel_pmu_enable_all.constprop.0+0x3b (/lib/modules/5.6.0-rc6-00008-gfe2413eefd7f/build/vmlinux)
--
cgtest 12148 11200.441103: 10227 cycles: ffffffffb9a0153d end_repeat_nmi+0x48 (/lib/modules/5.6.0-rc6-00008-gfe2413eefd7f/build/vmlinux)
cgtest 12148 11200.441106: 273295 cycles: ffffffffb99ecbc7 copy_page+0x7 (/lib/modules/5.6.0-rc6-00008-gfe2413eefd7f/build/vmlinux)
cgtest 12147 11200.441133: PERF_RECORD_CGROUP cgroup: 88 /sub/cgrp1
cgtest 12147 11200.441143: 2788845 cycles: ffffffffb94676c2 security_genfs_sid+0x102 (/lib/modules/5.6.0-rc6-00008-gfe2413eefd7f/build/vmlinux)
cgtest 12148 11200.441162: PERF_RECORD_CGROUP cgroup: 93 /sub/cgrp2
cgtest 12148 11200.441182: 2669546 cycles: 401020 _init+0x20 (/wb/cgtest)
cgtest 12149 11200.441247: 1 cycles: ffffffffb900d58b __intel_pmu_enable_all.constprop.0+0x3b (/lib/modules/5.6.0-rc6-00008-gfe2413eefd7f/build/vmlinux)
[root@seventh ~]#
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200325124536.2800725-10-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Namhyung Kim
|
f382842fa0 |
perf top: Add --all-cgroups option
The --all-cgroups option is to enable cgroup profiling support. It tells kernel to record CGROUP events in the ring buffer so that 'perf top' can identify task/cgroup association later. Committer testing: Use: # perf top --all-cgroups -s cgroup_id,cgroup,pid Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200325124536.2800725-9-namhyung@kernel.org Link: http://lore.kernel.org/lkml/20200402015249.3800462-1-namhyung@kernel.org [ Extracted the HAVE_FILE_HANDLE from the followup patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Namhyung Kim
|
8fb4b67939 |
perf record: Add --all-cgroups option
The --all-cgroups option is to enable cgroup profiling support. It
tells kernel to record CGROUP events in the ring buffer so that perf
report can identify task/cgroup association later.
[root@seventh ~]# perf record --all-cgroups --namespaces /wb/cgtest
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.042 MB perf.data (558 samples) ]
[root@seventh ~]# perf report --stdio -s cgroup_id,cgroup,pid
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 558 of event 'cycles'
# Event count (approx.): 458017341
#
# Overhead cgroup id (dev/inode) Cgroup Pid:Command
# ........ ..................... .......... ...............
#
33.15% 4/0xeffffffb /sub 9615:looper0
32.83% 4/0xf00002f5 /sub/cgrp2 9620:looper2
32.79% 4/0xf00002f4 /sub/cgrp1 9619:looper1
0.35% 4/0xf00002f5 /sub/cgrp2 9618:cgtest
0.34% 4/0xf00002f4 /sub/cgrp1 9617:cgtest
0.32% 4/0xeffffffb / 9615:looper0
0.11% 4/0xeffffffb /sub 9617:cgtest
0.10% 4/0xeffffffb /sub 9618:cgtest
#
# (Tip: Sample related events with: perf record -e '{cycles,instructions}:S')
#
[root@seventh ~]#
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200325124536.2800725-8-namhyung@kernel.org
Link: http://lore.kernel.org/lkml/20200402015249.3800462-1-namhyung@kernel.org
[ Extracted the HAVE_FILE_HANDLE from the followup patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Namhyung Kim
|
ab64069f1a |
perf record: Support synthesizing cgroup events
Synthesize cgroup events by iterating cgroup filesystem directories. The cgroup event only saves the portion of cgroup path after the mount point and the cgroup id (which actually is a file handle). Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200325124536.2800725-7-namhyung@kernel.org Link: http://lore.kernel.org/lkml/20200402015249.3800462-1-namhyung@kernel.org [ Extracted the HAVE_FILE_HANDLE from the followup patch, added missing __maybe_unused ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Namhyung Kim
|
b629f3e9d0 |
perf report: Add 'cgroup' sort key
The cgroup sort key is to show cgroup membership of each task.
Currently it shows full path in the cgroupfs (not relative to the root
of cgroup namespace) since it'd be more intuitive IMHO. Otherwise root
cgroup in different namespaces will all show same name - "/".
The cgroup sort key should come before cgroup_id otherwise
sort_dimension__add() will match it to cgroup_id as it only matches with
the given substring.
For example it will look like following. Note that record patch adding
--all-cgroups patch will come later.
$ perf record -a --namespace --all-cgroups cgtest
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.208 MB perf.data (4090 samples) ]
$ perf report -s cgroup_id,cgroup,pid
...
# Overhead cgroup id (dev/inode) Cgroup Pid:Command
# ........ ..................... .......... ...............
#
93.96% 0/0x0 / 0:swapper
1.25% 3/0xeffffffb / 278:looper0
0.86% 3/0xf000015f /sub/cgrp1 280:cgtest
0.37% 3/0xf0000160 /sub/cgrp2 281:cgtest
0.34% 3/0xf0000163 /sub/cgrp3 282:cgtest
0.22% 3/0xeffffffb /sub 278:looper0
0.20% 3/0xeffffffb / 280:cgtest
0.15% 3/0xf0000163 /sub/cgrp3 285:looper3
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200325124536.2800725-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Namhyung Kim
|
d1277aa36b |
perf cgroup: Maintain cgroup hierarchy
Each cgroup is kept in the perf_env's cgroup_tree sorted by the cgroup id. Hist entries have cgroup id can compare it directly and later it can be used to find a group name using this tree. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200325124536.2800725-5-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Namhyung Kim
|
ba78c1c546 |
perf tools: Basic support for CGROUP event
Implement basic functionality to support cgroup tracking. Each cgroup can be identified by inode number which can be read from userspace too. The actual cgroup processing will come in the later patch. Reported-by: kernel test robot <rong.a.chen@intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> [ fix perf test failure on sampling parsing ] Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200325124536.2800725-4-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Namhyung Kim
|
49f550ea87 |
perf tools: Add file-handle feature test
The file handle (FHANDLE) support is configurable so some systems might not
have it. So add a config feature item to check it on build time so that we
don't add the cgroup tracking feature based on that.
Committer notes:
Had to make the test use the same construct as its later use in
synthetic-events.c, in the next patch in this series. i.e. make it be:
struct {
struct file_handle fh;
uint64_t cgroup_id;
} handle;
To cope with:
CC /tmp/build/perf/util/cloexec.o
util/synthetic-events.c:428:22: error: field 'fh' with CC /tmp/build/perf/util/call-path.o
variable sized type 'struct file_handle' not at the end of a struct or class is a GNU
extension [-Werror,-Wgnu-variable-sized-type-not-at-end]
struct file_handle fh;
^
1 error generated.
Deal with this at some point, i.e. investigate if the right thing is to
remove that -Wgnu-variable-sized-type-not-at-end from our CFLAGS, for
now do the test the same way as it is used looks more sensible.
Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200402015249.3800462-1-namhyung@kernel.org
[ split from a larger patch, removed blank line at EOF ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Arnaldo Carvalho de Melo
|
460c3ed999 |
perf python: Include rwsem.c in the pythong biding
We'll need it for the cgroup patches, and its better to have it in a
separate patch in case we need to later revert the cgroup patches.
I.e. without this we have:
[root@five ~]# perf test -v python
19: 'import perf' in python :
--- start ---
test child forked, pid 148447
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: /tmp/build/perf/python/perf.cpython-37m-x86_64-linux-gnu.so: undefined symbol: down_write
test child finished with -1
---- end ----
'import perf' in python: FAILED!
[root@five ~]#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200403123606.GC23243@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Linus Torvalds
|
7cc7e93519 |
Merge branch 'x86-misc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 updates from Ingo Molnar: - extend the decoder maps with CET instructions - fix !vDSO corner cases * 'x86-misc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/tests: Add CET instructions to the new instructions test x86/insn: Add Control-flow Enforcement (CET) instructions to the opcode map selftests/x86/ptrace_syscall_32: Fix no-vDSO segfault selftests/x86/vdso: Fix no-vDSO segfaults |
||
Hagen Paul Pfeifer
|
26567ed79d |
perf script: Introduce --deltatime option
For some kind of analysis a deltatime output is more human friendly and
reduce the cognitive load for further analysis.
The following output demonstrate the new option "deltatime": calculate
the time difference in relation to the previous event.
$ perf script --deltatime
test 2525 [001] 0.000000: sdt_libev:ev_add: (5635e72a5ebd)
test 2525 [001] 0.000091: sdt_libev:epoll_wait_enter: (5635e72a76a9)
test 2525 [001] 1.000051: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1
test 2525 [001] 0.000685: sdt_libev:ev_add: (5635e72a5ebd)
test 2525 [001] 0.000048: sdt_libev:epoll_wait_enter: (5635e72a76a9)
test 2525 [001] 1.000104: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1
test 2525 [001] 0.003895: sdt_libev:epoll_wait_enter: (5635e72a76a9)
test 2525 [001] 0.996034: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1
test 2525 [001] 0.000058: sdt_libev:epoll_wait_enter: (5635e72a76a9)
test 2525 [001] 1.000004: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1
test 2525 [001] 0.000064: sdt_libev:epoll_wait_enter: (5635e72a76a9)
test 2525 [001] 0.999934: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1
test 2525 [001] 0.000056: sdt_libev:epoll_wait_enter: (5635e72a76a9)
test 2525 [001] 0.999930: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1
Committer testing:
So go from default output to --reltime and then this new --deltatime, to
contrast the various timestamp presentation modes for a random perf.data file I
had laying around:
[root@five ~]# perf script --reltime | head
perf 442394 [000] 0.000000: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 0.000002: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 0.000004: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 0.000006: 128 cycles: ffffffff972415a1 perf_event_update_userpage+0x1 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 0.000009: 2597 cycles: ffffffff97463785 cap_task_setscheduler+0x5 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000036: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000038: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000040: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000041: 224 cycles: ffffffff9700a53a perf_ibs_handle_irq+0x1da (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000044: 4439 cycles: ffffffff97120d85 put_prev_entity+0x45 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
[root@five ~]# perf script --deltatime | head
perf 442394 [000] 0.000000: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 0.000002: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 0.000001: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 0.000001: 128 cycles: ffffffff972415a1 perf_event_update_userpage+0x1 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 0.000002: 2597 cycles: ffffffff97463785 cap_task_setscheduler+0x5 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000027: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000002: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000001: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000001: 224 cycles: ffffffff9700a53a perf_ibs_handle_irq+0x1da (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 0.000002: 4439 cycles: ffffffff97120d85 put_prev_entity+0x45 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
[root@five ~]# perf script | head
perf 442394 [000] 7600.157861: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 7600.157864: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 7600.157866: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 7600.157867: 128 cycles: ffffffff972415a1 perf_event_update_userpage+0x1 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [000] 7600.157870: 2597 cycles: ffffffff97463785 cap_task_setscheduler+0x5 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 7600.157897: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 7600.157900: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 7600.157901: 16 cycles: ffffffff9706e544 native_write_msr+0x4 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 7600.157903: 224 cycles: ffffffff9700a53a perf_ibs_handle_irq+0x1da (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
perf 442394 [001] 7600.157906: 4439 cycles: ffffffff97120d85 put_prev_entity+0x45 (/usr/lib/debug/lib/modules/5.5.10-200.fc31.x86_64/vmlinux)
[root@five ~]#
Andi suggested we better implement it as a new field, i.e. -F deltatime, like:
[root@five ~]# perf script -F deltatime
Invalid field requested.
Usage: perf script [<options>]
or: perf script [<options>] record <script> [<record-options>] <command>
or: perf script [<options>] report <script> [script-args]
or: perf script [<options>] <script> [<record-options>] <command>
or: perf script [<options>] <top-script> [script-args]
-F, --fields <str> comma separated output fields prepend with 'type:'. +field to add and -field to remove.Valid types: hw,sw,trace,raw,synth. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr,symoff,srcline,period,iregs,uregs,brstack,brstacksym,flags,bpf-output,brstackinsn,brstackoff,callindent,insn,insnlen,synth,phys_addr,metric,misc,ipc
[root@five ~]#
I.e. we have -F for maximum flexibility:
[root@five ~]# perf script -F comm,pid,cpu,time | head
perf 442394 [000] 7600.157861:
perf 442394 [000] 7600.157864:
perf 442394 [000] 7600.157866:
perf 442394 [000] 7600.157867:
perf 442394 [000] 7600.157870:
perf 442394 [001] 7600.157897:
perf 442394 [001] 7600.157900:
perf 442394 [001] 7600.157901:
perf 442394 [001] 7600.157903:
perf 442394 [001] 7600.157906:
[root@five ~]#
But since we already have --reltime, having --deltatime, documented one after
the other is sensible.
Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lore.kernel.org/lkml/20200204173709.489161-1-hagen@jauu.net
[ Added 'perf script' man page entry for --deltatime ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Adrian Hunter
|
26cec7480e |
perf test x86: Add CET instructions to the new instructions test
Add to the "x86 instruction decoder - new instructions" test the following instructions: incsspd incsspq rdsspd rdsspq saveprevssp rstorssp wrssd wrssq wrussd wrussq setssbsy clrssbsy endbr32 endbr64 And the "notrack" prefix for indirect calls and jumps. For information about the instructions, refer Intel Control-flow Enforcement Technology Specification May 2019 (334525-003). Committer testing: $ perf test instr 67: x86 instruction decoder - new instructions : Ok $ Then use verbose mode and check one of those new instructions: $ perf test -v instr |& grep saveprevssp Decoded ok: f3 0f 01 ea saveprevssp Decoded ok: f3 0f 01 ea saveprevssp $ Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi v. Shankar <ravi.v.shankar@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: x86@kernel.org Link: http://lore.kernel.org/lkml/20200204171425.28073-3-yu-cheng.yu@intel.com Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
He Zhe
|
e4ffd066ff |
perf: Normalize gcc parameter when generating arch errno table
The $(CC) passed to arch_errno_names.sh may include a series of parameters along with gcc itself. To avoid overwriting the following parameters of arch_errno_names.sh and break the build like below, we just pick up the first word of the $(CC). find: unknown predicate `-m64/arch' x86_64-wrs-linux-gcc: warning: '-x c' after last input file has no effect x86_64-wrs-linux-gcc: error: unrecognized command line option '-m64/include/uapi/asm-generic/errno.h' x86_64-wrs-linux-gcc: fatal error: no input files Signed-off-by: He Zhe <zhe.he@windriver.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/1581618066-187262-2-git-send-email-zhe.he@windriver.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ian Rogers
|
2a3d252dff |
perf parse-events: Add defensive NULL check
Terms may have a NULL config in which case a strcmp will SEGV. This can be reproduced with: perf stat -e '*/event=?,nr/' sleep 1 Add a NULL check to avoid this. This was caught by LLVM's libfuzzer. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: John Garry <john.garry@huawei.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: clang-built-linux@googlegroups.com Link: http://lore.kernel.org/lkml/20200325164022.41385-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
1032f32645 |
perf/tests: Add CET instructions to the new instructions test
Add to the "x86 instruction decoder - new instructions" test the following instructions: incsspd incsspq rdsspd rdsspq saveprevssp rstorssp wrssd wrssq wrussd wrussq setssbsy clrssbsy endbr32 endbr64 And the notrack prefix for indirect calls and jumps. For information about the instructions, refer Intel Control-flow Enforcement Technology Specification May 2019 (334525-003). Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Link: https://lkml.kernel.org/r/20200204171425.28073-3-yu-cheng.yu@intel.com |
||
Tony Jones
|
eadcaa3dfd |
perf callchain: Update docs regarding kernel/user space unwinding
The method of unwinding for kernel space is defined by the kernel config, not by the value of --call-graph. Improve the documentation to reflect this. Signed-off-by: Tony Jones <tonyj@suse.de> Link: http://lore.kernel.org/lkml/20200325164053.10177-1-tonyj@suse.de Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Masahiro Yamada
|
d198b34f38 |
.gitignore: add SPDX License Identifier
Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
Ravi Bangoria
|
0d33b34352 |
perf dso: Fix dso comparison
Perf gets dso details from two different sources. 1st, from builid headers in perf.data and 2nd from MMAP2 samples. Dso from buildid header does not have dso_id detail. And dso from MMAP2 samples does not have buildid information. If detail of the same dso is present at both the places, filename is common. Previously, __dsos__findnew_link_by_longname_id() used to compare only long or short names, but Commit |
||
Christophe JAILLET
|
d74b181a02 |
perf cpumap: Fix snprintf overflow check
'snprintf' returns the number of characters which would be generated for the given input. If the returned value is *greater than* or equal to the buffer size, it means that the output has been truncated. Fix the overflow test accordingly. Fixes: |
||
John Garry
|
956a78356c |
perf test: Test pmu-events aliases
Add creating event aliases to the pmu-events test. So currently we verify that the generated pmu-events.c is as expected for some test events. Now test that we generate aliases as expected for those events during normal operation. For that, we cycle through each HW PMU in the system, and use the test events to create aliases, and verify those against known, expected values. For core PMUs, we should create an alias for every event in test_cpu_events[]. However, for uncore PMUs, they need to be matched by the pmu_event.pmu member, so use test_uncore_events[]; so check the match beforehand with pmu_uncore_alias_match(). A sample run is as follows for my x86 machine: john@linux-3c19:~/linux> tools/perf/perf test -vv 10 10: PMU events : --- start --- ... testing PMU uncore_arb aliases: no events to match testing PMU cstate_pkg aliases: no events to match skipping testing PMU breakpoint testing aliases PMU uncore_cbox_1: matched event unc_cbo_xsnp_response.miss_eviction testing PMU uncore_cbox_1 aliases: pass testing PMU power aliases: no events to match testing aliases PMU cpu: matched event bp_l1_btb_correct testing aliases PMU cpu: matched event bp_l2_btb_correct testing aliases PMU cpu: matched event segment_reg_loads.any testing aliases PMU cpu: matched event dispatch_blocked.any testing aliases PMU cpu: matched event eist_trans testing PMU cpu aliases: pass testing PMU intel_pt aliases: no events to match skipping testing PMU software skipping testing PMU intel_bts testing PMU uncore_imc aliases: no events to match testing aliases PMU uncore_cbox_0: matched event unc_cbo_xsnp_response.miss_eviction testing PMU uncore_cbox_0 aliases: pass testing PMU cstate_core aliases: no events to match skipping testing PMU tracepoint testing PMU msr aliases: no events to match test child finished with 0 Signed-off-by: John Garry <john.garry@huawei.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: James Clark <james.clark@arm.com> Cc: Joakim Zhang <qiangqing.zhang@nxp.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: linuxarm@huawei.com Link: http://lore.kernel.org/lkml/1584442939-8911-8-git-send-email-john.garry@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
John Garry
|
5b9a50001b |
perf pmu: Make pmu_uncore_alias_match() public
The perf pmu-events test will want to use pmu_uncore_alias_match(), so make it public. Signed-off-by: John Garry <john.garry@huawei.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: James Clark <james.clark@arm.com> Cc: Joakim Zhang <qiangqing.zhang@nxp.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: linuxarm@huawei.com Link: http://lore.kernel.org/lkml/1584442939-8911-7-git-send-email-john.garry@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
John Garry
|
d504fae93d |
perf pmu: Add is_pmu_core()
Add a function to decide whether a PMU is a core PMU. Signed-off-by: John Garry <john.garry@huawei.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: James Clark <james.clark@arm.com> Cc: Joakim Zhang <qiangqing.zhang@nxp.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: linuxarm@huawei.com Link: http://lore.kernel.org/lkml/1584442939-8911-6-git-send-email-john.garry@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
John Garry
|
a6c925fd3a |
perf test: Add pmu-events test
The initial test will verify that the test tables in generated pmu-events.c match against known, expected values. For known events added in pmu-events/arch/test, we need to add an entry in test_cpu_aliases_events[] or test_uncore_events[]. A sample run is as follows for x86: john@linux-3c19:~/linux> tools/perf/perf test -vv 10 10: PMU event aliases : --- start --- test child forked, pid 5316 testing event table bp_l1_btb_correct: pass testing event table bp_l2_btb_correct: pass testing event table segment_reg_loads.any: pass testing event table dispatch_blocked.any: pass testing event table eist_trans: pass testing event table uncore_hisi_ddrc.flux_wcmd: pass testing event table unc_cbo_xsnp_response.miss_eviction: pass test child finished with 0 ---- end ---- PMU event aliases: Ok Signed-off-by: John Garry <john.garry@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: James Clark <james.clark@arm.com> Cc: Joakim Zhang <qiangqing.zhang@nxp.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: linuxarm@huawei.com [ Fixup test_cpu_events[] and test_uncore_events[] sentinels to initialize one of its members to NULL, fixing the build in older compilers ] Link: http://lore.kernel.org/lkml/1584442939-8911-5-git-send-email-john.garry@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
John Garry
|
e45ad701e7 |
perf pmu: Refactor pmu_add_cpu_aliases()
Create pmu_add_cpu_aliases_map() from pmu_add_cpu_aliases(), so the caller can pass the map; the pmu-events test would use this since there would be no CPUID matching to a mapfile there. Signed-off-by: John Garry <john.garry@huawei.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: James Clark <james.clark@arm.com> Cc: Joakim Zhang <qiangqing.zhang@nxp.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: linuxarm@huawei.com Link: http://lore.kernel.org/lkml/1584442939-8911-4-git-send-email-john.garry@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
John Garry
|
d844780887 |
perf jevents: Support test events folder
With the goal of supporting pmu-events test case, introduce support for
a test events folder.
These test events can be used for testing generation of pmu-event tables
and alias creation for any arch.
When running the pmu-events test case, these test events will be used as
the platform-agnostic events, so aliases can be created per-PMU and
validated against known expected values.
To support the test events, add a "testcpu" entry in pmu_events_map[].
The pmu-events test will be able to lookup the events map for "testcpu",
to verify the generated tables against expected values.
The resultant generated pmu-events.c will now look like the following:
struct pmu_event pme_ampere_emag[] = {
{
.name = "ldrex_spec",
.event = "event=0x6c",
.desc = "Exclusive operation spe...",
.topic = "intrinsic",
.long_desc = "Exclusive operation ...",
},
...
};
struct pmu_event pme_test_cpu[] = {
{
.name = "uncore_hisi_ddrc.flux_wcmd",
.event = "event=0x2",
.desc = "DDRC write commands. Unit: hisi_sccl,ddrc ",
.topic = "uncore",
.long_desc = "DDRC write commands",
.pmu = "hisi_sccl,ddrc",
},
{
.name = "unc_cbo_xsnp_response.miss_eviction",
.event = "umask=0x81,event=0x22",
.desc = "Unit: uncore_cbox A cross-core snoop resulted ...",
.topic = "uncore",
.long_desc = "A cross-core snoop resulted from L3 ...",
.pmu = "uncore_cbox",
},
{
.name = "eist_trans",
.event = "umask=0x0,period=200000,event=0x3a",
.desc = "Number of Enhanced Intel SpeedStep(R) ...",
.topic = "other",
},
{
.name = 0,
},
};
struct pmu_events_map pmu_events_map[] = {
...
{
.cpuid = "0x00000000500f0000",
.version = "v1",
.type = "core",
.table = pme_ampere_emag
},
...
{
.cpuid = "testcpu",
.version = "v1",
.type = "core",
.table = pme_test_cpu,
},
{
.cpuid = 0,
.version = 0,
.type = 0,
.table = 0,
},
};
Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: James Clark <james.clark@arm.com>
Cc: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linuxarm@huawei.com
Link: http://lore.kernel.org/lkml/1584442939-8911-3-git-send-email-john.garry@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
John Garry
|
c52db67a74 |
perf jevents: Add some test events
Add some test PMU events. The events are randomly chosen from x86 and arm64 JSONs. The events include CPU and uncore events. Signed-off-by: John Garry <john.garry@huawei.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: James Clark <james.clark@arm.com> Cc: Joakim Zhang <qiangqing.zhang@nxp.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: linuxarm@huawei.com Link: http://lore.kernel.org/lkml/1584442939-8911-2-git-send-email-john.garry@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jiri Olsa
|
7cd053d4cf |
perf tools: Unify a bit the build directory output
Removing the extra 'SUBDIR' line from clean and doc build output. Because it's annoying.. ;-) Before: $ make clean ... SUBDIR Documentation CLEAN Documentation After: $ make clean ... CLEAN Documentation Before: $ make doc BUILD: Doing 'make -j8' parallel build SUBDIR Documentation ASCIIDOC perf-stat.html ... After: $ make doc BUILD: Doing 'make -j8' parallel build ASCIIDOC perf-stat.html ... Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200318204522.1200981-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Vijay Thakkar
|
b5b8a7cf14 |
perf vendor events amd: Update Zen1 events to V2
This patch updates the PMCs for AMD Zen1 core based processors (Family
17h; Models 0 through 2F) to be in accordance with PMCs as
documented in the latest versions of the AMD Processor Programming
Reference [1], [2] and [3]. Note that some events, such as FPU pipe
assignment are missing in [1], and therefore [3] is included for full
coverage of events.
PMCs added:
fpu_pipe_assignment.dual{0|1|2|3}
fpu_pipe_assignment.total{0|1|2|3}
ls_mab_alloc.dc_prefetcher
ls_mab_alloc.stores
ls_mab_alloc.loads
bp_dyn_ind_pred
bp_de_redirect
PMC removed:
ex_ret_cond_misp
Cumulative counts, fpu_pipe_assignment.total and
fpu_pipe_assignment.dual, existed in v1, but did expose port-level
counters.
ex_ret_cond_misp has been removed as it has been removed from the latest
versions of the PPR, and when tested, always seems to sample zero as
tested on a Ryzen 3400G system.
[1]: Processor Programming Reference (PPR) for AMD Family 17h Models
01h,08h, Revision B2 Processors, 54945 Rev 3.03 - Jun 14, 2019.
[2]: Processor Programming Reference (PPR) for AMD Family 17h Model 18h,
Revision B1 Processors, 55570-B1 Rev 3.14 - Sep 26, 2019.
[3]: OSRR for AMD Family 17h processors, Models 00h-2Fh, 56255 Rev 3.03 - July, 2018
All of the PPRs can be found at:
https://bugzilla.kernel.org/show_bug.cgi?id=206537
Signed-off-by: Vijay Thakkar <vijaythakkar@me.com>
Acked-by: Kim Phillips <kim.phillips@amd.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Jon Grimm <jon.grimm@amd.com>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: vijay thakkar <vijaythakkar@me.com>
Link: http://lore.kernel.org/lkml/20200318190002.307290-4-vijaythakkar@me.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Vijay Thakkar
|
2079f7aa0a |
perf vendor events amd: Add Zen2 events
This patch adds PMU events for AMD Zen2 core based processors, namely, Matisse (model 71h), Castle Peak (model 31h) and Rome (model 2xh), as documented in the AMD Processor Programming Reference for Matisse [1]. The model number regex has been set to detect all the models under family 17 that do not match those of Zen1, as the range is larger for zen2. Zen2 adds some additional counters that are not present in Zen1 and events for them have been added in this patch. Some counters have also been removed for Zen2 thatwere previously present in Zen1 and have been confirmed to always sample zero on zen2. These added/removed counters have been omitted for brevity but can be found here: https://gist.github.com/thakkarV/5b12ca5fd7488eb2c42e451e40bdd5f3 Note that PPR for Zen2 [1] does not include some counters that were documented in the PPR for Zen1 based processors [2]. After having tested these counters, some of them that still work for zen2 systems have been preserved in the events for zen2. The counters that are omitted in [1] but are still measurable and non-zero on zen2 (tested on a Ryzen 3900X system) are the following: PMC 0x000 fpu_pipe_assignment.{total|total0|total1|total2|total3} PMC 0x004 fp_num_mov_elim_scal_op.* PMC 0x046 ls_tablewalker.* PMC 0x062 l2_latency.l2_cycles_waiting_on_fills PMC 0x063 l2_wcb_req.* PMC 0x06D l2_fill_pending.l2_fill_busy PMC 0x080 ic_fw32 PMC 0x081 ic_fw32_miss PMC 0x086 bp_snp_re_sync PMC 0x087 ic_fetch_stall.* PMC 0x08C ic_cache_inval.* PMC 0x099 bp_tlb_rel PMC 0x0C7 ex_ret_brn_resync PMC 0x28A ic_oc_mode_switch.* L3PMC 0x001 l3_request_g1.* L3PMC 0x006 l3_comb_clstr_state.* [1]: Processor Programming Reference (PPR) for AMD Family 17h Model 71h, Revision B0 Processors, 56176 Rev 3.06 - Jul 17, 2019 [2]: Processor Programming Reference (PPR) for AMD Family 17h Models 01h,08h, Revision B2 Processors, 54945 Rev 3.03 - Jun 14, 2019 All of the PPRs can be found at: https://bugzilla.kernel.org/show_bug.cgi?id=206537 Here are the results of running "fpu_pipe_assignment.total" events on my Ryzen 3900X family 17h model 71h system: Before this patch: $> perf list *fpu_pipe_assignment* List of pre-defined events (to be used in -e): After: $> perf list *fpu_pipe_assignment* floating point: fpu_pipe_assignment.total [Total number of fp uOps] fpu_pipe_assignment.total0 [Total number uOps assigned to pipe 0] fpu_pipe_assignment.total1 [Total number uOps assigned to pipe 1] fpu_pipe_assignment.total2 [Total number uOps assigned to pipe 2] fpu_pipe_assignment.total3 [Total number uOps assigned to pipe 3] Metric Groups: $> perf stat -e fpu_pipe_assignment.total sleep 1 Performance counter stats for 'sleep 1': 25,883 fpu_pipe_assignment.total 1.004145868 seconds time elapsed 0.001805000 seconds user 0.000000000 seconds sys Usage tests while running Linpackin the background: $> perf stat -I1000 -e fpu_pipe_assignment.total 1.000266796 79,313,191,516 fpu_pipe_assignment.total 2.000809630 68,091,474,430 fpu_pipe_assignment.total 3.001028115 52,925,023,174 fpu_pipe_assignment.total $> perf record -e fpu_pipe_assignment.total,fpu_pipe_assignment.total0 -a sleep 1 [ perf record: Woken up 9 times to write data ] [ perf record: Captured and wrote 4.031 MB perf.data (64764 samples) ] $> perf report --stdio --no-header | head -30 98.33% xhpl xhpl [.] dgemm_kernel 0.28% xhpl xhpl [.] dtrsm_kernel_LT 0.10% xhpl [kernel.kallsyms] [k] entry_SYSCALL_64 0.08% xhpl xhpl [.] idamax_k 0.07% baloo_file_extr liblmdb.so [.] mdb_mid2l_insert 0.06% xhpl xhpl [.] dgemm_itcopy 0.06% xhpl xhpl [.] dgemm_oncopy 0.06% xhpl [kernel.kallsyms] [k] __schedule 0.06% xhpl [kernel.kallsyms] [k] syscall_trace_enter 0.06% xhpl [kernel.kallsyms] [k] native_sched_clock 0.06% xhpl [kernel.kallsyms] [k] pick_next_task_fair 0.05% xhpl xhpl [.] blas_thread_server.llvm.15009391670273914865 0.04% xhpl [kernel.kallsyms] [k] do_syscall_64 0.04% xhpl [kernel.kallsyms] [k] yield_task_fair 0.04% xhpl libpthread-2.31.so [.] __pthread_mutex_unlock_usercnt 0.03% xhpl [kernel.kallsyms] [k] cpuacct_charge 0.03% xhpl [kernel.kallsyms] [k] syscall_return_via_sysret 0.03% xhpl libc-2.31.so [.] __sched_yield 0.03% xhpl [kernel.kallsyms] [k] __calc_delta $> perf annotate --stdio2 dgemm_kernel | egrep '^ {0,2}[0-9]+' -B2 -A2 sub $0x60,%rsp mov %rbx,(%rsp) 0.00 mov %rbp,0x8(%rsp) mov %r12,0x10(%rsp) 0.00 mov %r13,0x18(%rsp) mov %r14,0x20(%rsp) mov %r15,0x28(%rsp) -- mov %rdi,%r13 mov %rsi,0x28(%rsp) 0.00 mov %rdx,%r12 vmovsd %xmm0,0x30(%rsp) shl $0x3,%r10 mov 0x28(%rsp),%rax 0.00 xor %rdx,%rdx mov $0x18,%rdi div %rdi -- nop a0: mov %r12,%rax 0.00 shl $0x3,%rax mov %r8,%rdi lea (%r8,%rax,8),%r15 -- mov %r12,%rax nop 0.00 c0: vmovups (%rdi),%ymm1 0.09 vmovups 0x20(%rdi),%ymm2 0.02 vmovups (%r15),%ymm3 0.10 vmovups %ymm1,(%rsi) 0.07 vmovups %ymm2,0x20(%rsi) 0.07 vmovups %ymm3,0x40(%rsi) 0.06 add $0x40,%rdi add $0x40,%r15 add $0x60,%rsi 0.00 dec %rax ↑ jne c0 mov %r9,%r15 -- nop 110: lea 0x80(%rsp),%rsi 0.01 add $0x60,%rsi 0.03 mov %r12,%rax 0.00 sar $0x3,%rax cmp $0x2,%rax ↓ jl d26 prefetcht0 0x200(%rdi) 0.01 vmovups -0x60(%rsi),%ymm1 0.02 prefetcht0 0xa0(%rsi) 0.00 vbroadcastsd -0x80(%rdi),%ymm0 0.00 prefetcht0 0xe0(%rsi) 0.03 vmovups -0x40(%rsi),%ymm2 0.00 prefetcht0 0x120(%rsi) vmovups -0x20(%rsi),%ymm3 vmulpd %ymm0,%ymm1,%ymm4 0.01 prefetcht0 0x160(%rsi) vmulpd %ymm0,%ymm2,%ymm8 0.01 vmulpd %ymm0,%ymm3,%ymm12 0.02 prefetcht0 0x1a0(%rsi) 0.01 vbroadcastsd -0x78(%rdi),%ymm0 vmulpd %ymm0,%ymm1,%ymm5 0.01 vmulpd %ymm0,%ymm2,%ymm9 vmulpd %ymm0,%ymm3,%ymm13 0.01 vbroadcastsd -0x70(%rdi),%ymm0 vmulpd %ymm0,%ymm1,%ymm6 0.00 vmulpd %ymm0,%ymm2,%ymm10 0.00 add $0x60,%rsi ... snip ... nop 65e0: vmovddup -0x60(%rsi),%xmm2 0.00 vmovups -0x80(%rdi),%xmm0 vmovups -0x70(%rdi),%xmm1 0.00 vmovddup -0x58(%rsi),%xmm3 vfmadd231pd %xmm0,%xmm2,%xmm4 0.00 vfmadd231pd %xmm1,%xmm2,%xmm5 0.00 vfmadd231pd %xmm0,%xmm3,%xmm6 0.00 vfmadd231pd %xmm1,%xmm3,%xmm7 0.00 add $0x10,%rsi add $0x20,%rdi 0.00 dec %rax ↑ jne 65e0 nop nop 6620: vmovddup 0x30(%rsp),%xmm0 0.00 vmulpd %xmm0,%xmm4,%xmm4 0.00 vmulpd %xmm0,%xmm5,%xmm5 vmulpd %xmm0,%xmm6,%xmm6 vmulpd %xmm0,%xmm7,%xmm7 vaddpd (%r15),%xmm4,%xmm4 vaddpd 0x10(%r15),%xmm5,%xmm5 0.00 vaddpd (%r15,%r10,1),%xmm6,%xmm6 0.00 vaddpd 0x10(%r15,%r10,1),%xmm7,%xmm7 0.00 vmovups %xmm4,(%r15) vmovups %xmm5,0x10(%r15) 0.00 vmovups %xmm6,(%r15,%r10,1) vmovups %xmm7,0x10(%r15,%r10,1) add $0x20,%r15 -- lea (%r8,%rax,8),%r8 69d8: mov 0x20(%rsp),%r14 0.00 test $0x1,%r14 ↓ je 6d84 mov %r9,%r15 -- vbroadcastsd -0x28(%rsi),%ymm3 vfmadd231pd (%rdi),%ymm0,%ymm4 0.00 vfmadd231pd 0x20(%rdi),%ymm1,%ymm5 vfmadd231pd 0x40(%rdi),%ymm2,%ymm6 vfmadd231pd 0x60(%rdi),%ymm3,%ymm7 -- vmulpd %ymm0,%ymm4,%ymm4 vaddpd (%r15),%ymm4,%ymm4 0.00 vmovups %ymm4,(%r15) add $0x20,%r15 dec %r11 -- mov %rbx,%rsp mov (%rsp),%rbx 0.01 mov 0x8(%rsp),%rbp mov 0x10(%rsp),%r12 mov 0x18(%rsp),%r13 Signed-off-by: Vijay Thakkar <vijaythakkar@me.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Kim Phillips <kim.phillips@amd.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Jon Grimm <jon.grimm@amd.com> Cc: Martin Liška <mliska@suse.cz> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200318190002.307290-3-vijaythakkar@me.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Vijay Thakkar
|
c5f18e9e94 |
perf vendor events amd: Restrict model detection for zen1 based processors
This patch changes the previous blanket detection of AMD Family 17h processors to be more specific to Zen1 core based products only by replacing model detection regex pattern [[:xdigit:]]+ with ([12][0-9A-F]|[0-9A-F]), restricting to models 0 though 2f only. This change is required to allow for the addition of separate PMU events for Zen2 core based models in the following patches as those belong to family 17h but have different PMCs. Current PMU events directory has also been renamed to "amdzen1" from "amdfam17h" to reflect this specificity. Note that although this change does not break PMU counters for existing zen1 based systems, it does disable the current set of counters for zen2 based systems. Counters for zen2 have been added in the following patches in this patchset. Signed-off-by: Vijay Thakkar <vijaythakkar@me.com> Acked-by: Kim Phillips <kim.phillips@amd.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Jon Grimm <jon.grimm@amd.com> Cc: Martin Liška <mliska@suse.cz> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200318190002.307290-2-vijaythakkar@me.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Kajol Jain
|
58fc90fda0 |
perf metricgroup: Fix printing event names of metric group with multiple events incase of overlapping events
Commit
|
||
|
Jin Yao
|
d13e9e413e |
perf stat: Align the output for interval aggregation mode
There is a slight misalignment in -A -I output.
For example:
# perf stat -e cpu/event=cpu-cycles/ -a -A -I 1000
# time CPU counts unit events
1.000440863 CPU0 1,068,388 cpu/event=cpu-cycles/
1.000440863 CPU1 875,954 cpu/event=cpu-cycles/
1.000440863 CPU2 3,072,538 cpu/event=cpu-cycles/
1.000440863 CPU3 4,026,870 cpu/event=cpu-cycles/
1.000440863 CPU4 5,919,630 cpu/event=cpu-cycles/
1.000440863 CPU5 2,714,260 cpu/event=cpu-cycles/
1.000440863 CPU6 2,219,240 cpu/event=cpu-cycles/
1.000440863 CPU7 1,299,232 cpu/event=cpu-cycles/
The value of counts is not aligned with the column "counts" and
the event name is not aligned with the column "events".
With this patch, the output is,
# perf stat -e cpu/event=cpu-cycles/ -a -A -I 1000
# time CPU counts unit events
1.000423009 CPU0 997,421 cpu/event=cpu-cycles/
1.000423009 CPU1 1,422,042 cpu/event=cpu-cycles/
1.000423009 CPU2 484,651 cpu/event=cpu-cycles/
1.000423009 CPU3 525,791 cpu/event=cpu-cycles/
1.000423009 CPU4 1,370,100 cpu/event=cpu-cycles/
1.000423009 CPU5 442,072 cpu/event=cpu-cycles/
1.000423009 CPU6 205,643 cpu/event=cpu-cycles/
1.000423009 CPU7 1,302,250 cpu/event=cpu-cycles/
Now output is aligned.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200218071614.25736-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Jin Yao
|
dbddf17474 |
perf report/top TUI: Support hotkeys to let user select any event for sorting
When performing "perf report --group", it shows the event group information
together. In previous patch, we have supported a new option "--group-sort-idx"
to sort the output by the event at the index n in event group.
It would be nice if we can use a hotkey in browser to select a event
to sort.
For example,
# perf report --group
Samples: 12K of events 'cpu/instructions,period=2000003/, cpu/cpu-cycles,period=200003/, ...
Overhead Command Shared Object Symbol
92.19% 98.68% 0.00% 93.30% mgen mgen [.] LOOP1
3.12% 0.29% 0.00% 0.16% gsd-color libglib-2.0.so.0.5600.4 [.] 0x0000000000049515
1.56% 0.03% 0.00% 0.04% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494b7
1.56% 0.01% 0.00% 0.00% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494ce
1.56% 0.00% 0.00% 0.00% mgen [kernel.kallsyms] [k] task_tick_fair
0.00% 0.15% 0.00% 0.04% perf [kernel.kallsyms] [k] smp_call_function_single
0.00% 0.13% 0.00% 6.08% swapper [kernel.kallsyms] [k] intel_idle
0.00% 0.03% 0.00% 0.00% gsd-color libglib-2.0.so.0.5600.4 [.] g_main_context_check
0.00% 0.03% 0.00% 0.00% swapper [kernel.kallsyms] [k] apic_timer_interrupt
0.00% 0.03% 0.00% 0.00% swapper [kernel.kallsyms] [k] check_preempt_curr
When user press hotkey '3' (event index, starting from 0), it indicates
to sort output by the forth event in group.
Samples: 12K of events 'cpu/instructions,period=2000003/, cpu/cpu-cycles,period=200003/, ...
Overhead Command Shared Object Symbol
92.19% 98.68% 0.00% 93.30% mgen mgen [.] LOOP1
0.00% 0.13% 0.00% 6.08% swapper [kernel.kallsyms] [k] intel_idle
3.12% 0.29% 0.00% 0.16% gsd-color libglib-2.0.so.0.5600.4 [.] 0x0000000000049515
0.00% 0.00% 0.00% 0.06% swapper [kernel.kallsyms] [k] hrtimer_start_range_ns
1.56% 0.03% 0.00% 0.04% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494b7
0.00% 0.15% 0.00% 0.04% perf [kernel.kallsyms] [k] smp_call_function_single
0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] update_curr
0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] apic_timer_interrupt
0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] native_apic_msr_eoi_write
0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] __update_load_avg_se
v6:
---
Jiri provided a good improvement to eliminate unneeded refresh.
This improvement is added to v6.
v2:
---
1. Report warning at helpline when index is invalid.
2. Report warning at helpline when it's not group event.
3. Use "case '0' ... '9'" to refine the code
4. Split K_RELOAD implementation to another patch.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200220013616.19916-4-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Jin Yao
|
5e3b810aac |
perf report: Support a new key to reload the browser
Sometimes we may need to reload the browser to update the output since some options are changed. This patch creates a new key K_RELOAD. Once the __cmd_report() returns K_RELOAD, it would repeat the whole process, such as, read samples from data file, sort the data and display in the browser. v5: --- 1. Fix the 'make NO_SLANG=1' error. Define K_RELOAD in util/hist.h. 2. Skip setup_sorting() in repeat path if last key is K_RELOAD. v4: --- Need to quit in perf_evsel_menu__run if key is K_RELOAD. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200220013616.19916-3-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jin Yao
|
429a5f9d89 |
perf report: Allow specifying event to be used as sort key in --group output
When performing "perf report --group", it shows the event group
information together. By default, the output is sorted by the first
event in group.
It would be nice for user to select any event for sorting. This patch
introduces a new option "--group-sort-idx" to sort the output by the
event at the index n in event group.
For example,
Before:
# perf report --group --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 12K of events 'cpu/instructions,period=2000003/, cpu/cpu-cycles,period=200003/, BR_MISP_RETIRED.ALL_BRANCHES:pp, cpu/event=0xc0,umask=1,cmask=1,
# Event count (approx.): 6451235635
#
# Overhead Command Shared Object Symbol
# ................................ ......... ....................... ...................................
#
92.19% 98.68% 0.00% 93.30% mgen mgen [.] LOOP1
3.12% 0.29% 0.00% 0.16% gsd-color libglib-2.0.so.0.5600.4 [.] 0x0000000000049515
1.56% 0.03% 0.00% 0.04% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494b7
1.56% 0.01% 0.00% 0.00% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494ce
1.56% 0.00% 0.00% 0.00% mgen [kernel.kallsyms] [k] task_tick_fair
0.00% 0.15% 0.00% 0.04% perf [kernel.kallsyms] [k] smp_call_function_single
0.00% 0.13% 0.00% 6.08% swapper [kernel.kallsyms] [k] intel_idle
0.00% 0.03% 0.00% 0.00% gsd-color libglib-2.0.so.0.5600.4 [.] g_main_context_check
0.00% 0.03% 0.00% 0.00% swapper [kernel.kallsyms] [k] apic_timer_interrupt
...
After:
# perf report --group --stdio --group-sort-idx 3
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 12K of events 'cpu/instructions,period=2000003/, cpu/cpu-cycles,period=200003/, BR_MISP_RETIRED.ALL_BRANCHES:pp, cpu/event=0xc0,umask=1,cmask=1,
# Event count (approx.): 6451235635
#
# Overhead Command Shared Object Symbol
# ................................ ......... ....................... ...................................
#
92.19% 98.68% 0.00% 93.30% mgen mgen [.] LOOP1
0.00% 0.13% 0.00% 6.08% swapper [kernel.kallsyms] [k] intel_idle
3.12% 0.29% 0.00% 0.16% gsd-color libglib-2.0.so.0.5600.4 [.] 0x0000000000049515
0.00% 0.00% 0.00% 0.06% swapper [kernel.kallsyms] [k] hrtimer_start_range_ns
1.56% 0.03% 0.00% 0.04% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494b7
0.00% 0.15% 0.00% 0.04% perf [kernel.kallsyms] [k] smp_call_function_single
0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] update_curr
0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] apic_timer_interrupt
0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] native_apic_msr_eoi_write
0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] __update_load_avg_se
0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] scheduler_tick
Now the output is sorted by the fourth event in group.
v7:
---
Rebase to latest perf/core, no other change.
v4:
---
1. Update Documentation/perf-report.txt to mention
'--group-sort-idx' support multiple groups with different
amount of events and it should be used on grouped events.
2. Update __hpp__group_sort_idx(), just return when the
idx is out of limit.
3. Return failure on symbol_conf.group_sort_idx && !session->evlist->nr_groups.
So now we don't need to use together with --group.
v3:
---
Refine the code in __hpp__group_sort_idx().
Before:
for (i = 1; i < nr_members; i++) {
if (i == idx) {
ret = field_cmp(fields_a[i], fields_b[i]);
if (ret)
goto out;
}
}
After:
if (idx >= 1 && idx < nr_members) {
ret = field_cmp(fields_a[idx], fields_b[idx]);
if (ret)
goto out;
}
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200220013616.19916-2-yao.jin@linux.intel.com
[ Renamed pair_fields_alloc() to hist_entry__new_pair() and combined decl + assignment of vars ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Jin Yao
|
ec0479a63b |
perf report/top TUI: Support hotkey 'a' for annotation of unresolved addresses
In previous patch, we have supported the annotation functionality even without symbols. For this patch, it supports the hotkey 'a' on address in report view. Note that, for branch mode, we only support the annotation for "branch to" address. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200227043939.4403-4-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Jin Yao
|
7b0a0dcb64 |
perf report: Support interactive annotation of code without symbols
For perf report on stripped binaries it is currently impossible to do
annotation. The annotation state is all tied to symbols, but there are
either no symbols, or symbols are not covering all the code.
We should support the annotation functionality even without symbols.
This patch fakes a symbol and the symbol name is the string of address.
After that, we just follow current annotation working flow.
For example,
1. perf report
Overhead Command Shared Object Symbol
20.67% div libc-2.27.so [.] __random_r
17.29% div libc-2.27.so [.] __random
10.59% div div [.] 0x0000000000000628
9.25% div div [.] 0x0000000000000612
6.11% div div [.] 0x0000000000000645
2. Select the line of "10.59% div div [.] 0x0000000000000628" and ENTER.
Annotate 0x0000000000000628
Zoom into div thread
Zoom into div DSO (use the 'k' hotkey to zoom directly into the kernel)
Browse map details
Run scripts for samples of symbol [0x0000000000000628]
Run scripts for all samples
Switch to another data file in PWD
Exit
3. Select the "Annotate 0x0000000000000628" and ENTER.
Percent│
│
│
│ Disassembly of section .text:
│
│ 0000000000000628 <.text+0x68>:
│ divsd %xmm4,%xmm0
│ divsd %xmm3,%xmm1
│ movsd (%rsp),%xmm2
│ addsd %xmm1,%xmm0
│ addsd %xmm2,%xmm0
│ movsd %xmm0,(%rsp)
Now we can see the dump of object starting from 0x628.
v5:
---
Remove the hotkey 'a' implementation from this patch. It
will be moved to a separate patch.
v4:
---
1. Support the hotkey 'a'. When we press 'a' on address,
now it supports the annotation.
2. Change the patch title from
"Support interactive annotation of code without symbols" to
"perf report: Support interactive annotation of code without symbols"
v3:
---
Keep just the ANNOTATION_DUMMY_LEN, and remove the
opts->annotate_dummy_len since it's the "maybe in future
we will provide" feature.
v2:
---
Fix a crash issue when annotating an address in "unknown" object.
The steps to reproduce this issue:
perf record -e cycles:u ls
perf report
75.29% ls ld-2.27.so [.] do_lookup_x
23.64% ls ld-2.27.so [.] __GI___tunables_init
1.04% ls [unknown] [k] 0xffffffff85c01210
0.03% ls ld-2.27.so [.] _start
When annotating 0xffffffff85c01210, the crash happens.
v2 adds checking for ms->map in add_annotate_opt(). If the object is
"unknown", ms->map is NULL.
Committer notes:
Renamed new_annotate_sym() to symbol__new_unresolved().
Use PRIx64 to fix this issue in some 32-bit arches:
ui/browsers/hists.c: In function 'symbol__new_unresolved':
ui/browsers/hists.c:2474:38: error: format '%lx' expects argument of type 'long unsigned int', but argument 5 has type 'u64' {aka 'long long unsigned int'} [-Werror=format=]
snprintf(name, sizeof(name), "%-#.*lx", BITS_PER_LONG / 4, addr);
~~~~~~^ ~~~~
%-#.*llx
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200227043939.4403-3-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Jin Yao
|
443bc639e5 |
perf report: Print al_addr when symbol is not found
For branch mode, if the symbol is not found, it prints
the address.
For example, 0x0000555eee0365a0 in below output.
Overhead Command Source Shared Object Source Symbol Target Symbol
17.55% div libc-2.27.so [.] __random [.] __random
6.11% div div [.] 0x0000555eee0365a0 [.] rand
6.10% div libc-2.27.so [.] rand [.] 0x0000555eee036769
5.80% div libc-2.27.so [.] __random_r [.] __random
5.72% div libc-2.27.so [.] __random [.] __random_r
5.62% div libc-2.27.so [.] __random_r [.] __random_r
5.38% div libc-2.27.so [.] __random [.] rand
4.56% div libc-2.27.so [.] __random [.] __random
4.49% div div [.] 0x0000555eee036779 [.] 0x0000555eee0365ff
4.25% div div [.] 0x0000555eee0365fa [.] 0x0000555eee036760
But it's not very easy to understand what the instructions
are in the binary. So this patch uses the al_addr instead.
With this patch, the output is
Overhead Command Source Shared Object Source Symbol Target Symbol
17.55% div libc-2.27.so [.] __random [.] __random
6.11% div div [.] 0x00000000000005a0 [.] rand
6.10% div libc-2.27.so [.] rand [.] 0x0000000000000769
5.80% div libc-2.27.so [.] __random_r [.] __random
5.72% div libc-2.27.so [.] __random [.] __random_r
5.62% div libc-2.27.so [.] __random_r [.] __random_r
5.38% div libc-2.27.so [.] __random [.] rand
4.56% div libc-2.27.so [.] __random [.] __random
4.49% div div [.] 0x0000000000000779 [.] 0x00000000000005ff
4.25% div div [.] 0x00000000000005fa [.] 0x0000000000000760
Now we can use objdump to dump the object starting from 0x5a0.
For example,
objdump -d --start-address 0x5a0 div
00000000000005a0 <rand@plt>:
5a0: ff 25 2a 0a 20 00 jmpq *0x200a2a(%rip) # 200fd0 <__cxa_finalize@plt+0x200a20>
5a6: 68 02 00 00 00 pushq $0x2
5ab: e9 c0 ff ff ff jmpq 570 <srand@plt-0x10>
...
Committer testing:
[root@seventh ~]# perf record -a -b sleep 1
[root@seventh ~]# perf report --header-only | grep cpudesc
# cpudesc : Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz
[root@seventh ~]# perf evlist -v
cycles: size: 120, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD|BRANCH_STACK, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1, branch_sample_type: ANY
[root@seventh ~]#
Before:
[root@seventh ~]# perf report --stdio --dso libsystemd-shared-241.so | head -20
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 2K of event 'cycles'
# Event count (approx.): 2240
#
# Overhead Command Source Shared Object Source Symbol Target Symbol Basic Block Cycles
# ........ ............... ........................ ...................... ...................... ..................
#
0.13% systemd-journal libc-2.29.so [.] cfree@GLIBC_2.2.5 [.] _int_free 1
0.09% systemd libsystemd-shared-241.so [.] 0x00007fe406465c82 [.] 0x00007fe406465d80 1
0.09% systemd libsystemd-shared-241.so [.] 0x00007fe406465ded [.] 0x00007fe406465c30 1
0.09% systemd libsystemd-shared-241.so [.] 0x00007fe406465e4e [.] 0x00007fe406465de0 1
0.09% systemd-journal systemd-journald [.] free@plt [.] cfree@GLIBC_2.2.5 1
0.09% systemd-journal libc-2.29.so [.] _int_free [.] _int_free 18
0.09% systemd-journal libc-2.29.so [.] _int_free [.] _int_free 2
0.04% systemd libsystemd-shared-241.so [.] bus_resolve@plt [.] bus_resolve 204
0.04% systemd libsystemd-shared-241.so [.] getpid_cached@plt [.] getpid_cached 7
[root@seventh ~]#
After:
[root@seventh ~]# perf report --stdio --dso libsystemd-shared-241.so | head -20
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 2K of event 'cycles'
# Event count (approx.): 2240
#
# Overhead Command Source Shared Object Source Symbol Target Symbol Basic Block Cycles
# ........ ............... ........................ ...................... ...................... ..................
#
0.13% systemd-journal libc-2.29.so [.] cfree@GLIBC_2.2.5 [.] _int_free 1
0.09% systemd libsystemd-shared-241.so [.] 0x00000000000f7c82 [.] 0x00000000000f7d80 1
0.09% systemd libsystemd-shared-241.so [.] 0x00000000000f7ded [.] 0x00000000000f7c30 1
0.09% systemd libsystemd-shared-241.so [.] 0x00000000000f7e4e [.] 0x00000000000f7de0 1
0.09% systemd-journal systemd-journald [.] free@plt [.] cfree@GLIBC_2.2.5 1
0.09% systemd-journal libc-2.29.so [.] _int_free [.] _int_free 18
0.09% systemd-journal libc-2.29.so [.] _int_free [.] _int_free 2
0.04% systemd libsystemd-shared-241.so [.] bus_resolve@plt [.] bus_resolve 204
0.04% systemd libsystemd-shared-241.so [.] getpid_cached@plt [.] getpid_cached 7
[root@seventh ~]#
Lets use -v to get full paths and then try objdump on the unresolved address:
[root@seventh ~]# perf report -v --stdio --dso libsystemd-shared-241.so |& grep libsystemd-shared-241.so | tail -1
0.04% systemd-journal /usr/lib/systemd/libsystemd-shared-241.so 0x80c1a B [.] 0x0000000000080c1a 0x80a95 B [.] 0x0000000000080a95 61
[root@seventh ~]#
[root@seventh ~]# objdump -d --start-address 0x00000000000f7d80 /usr/lib/systemd/libsystemd-shared-241.so | head -20
/usr/lib/systemd/libsystemd-shared-241.so: file format elf64-x86-64
Disassembly of section .text:
00000000000f7d80 <proc_cmdline_parse_given@@SD_SHARED+0x330>:
f7d80: 41 39 11 cmp %edx,(%r9)
f7d83: 0f 84 ff fe ff ff je f7c88 <proc_cmdline_parse_given@@SD_SHARED+0x238>
f7d89: 4c 8d 05 97 09 0c 00 lea 0xc0997(%rip),%r8 # 1b8727 <utf8_skip_data@@SD_SHARED+0x3147>
f7d90: b9 49 00 00 00 mov $0x49,%ecx
f7d95: 48 8d 15 c9 f5 0b 00 lea 0xbf5c9(%rip),%rdx # 1b7365 <utf8_skip_data@@SD_SHARED+0x1d85>
f7d9c: 31 ff xor %edi,%edi
f7d9e: 48 8d 35 9b ff 0b 00 lea 0xbff9b(%rip),%rsi # 1b7d40 <utf8_skip_data@@SD_SHARED+0x2760>
f7da5: e8 a6 d6 f4 ff callq 45450 <log_assert_failed_realm@plt>
f7daa: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
f7db0: 41 56 push %r14
f7db2: 41 55 push %r13
f7db4: 41 54 push %r12
f7db6: 55 push %rbp
[root@seventh ~]#
If we tried the the reported address before this patch:
[root@seventh ~]# objdump -d --start-address 0x00007fe406465d80 /usr/lib/systemd/libsystemd-shared-241.so | head -20
/usr/lib/systemd/libsystemd-shared-241.so: file format elf64-x86-64
[root@seventh ~]#
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200227043939.4403-2-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
Leo Yan
|
7eec00a747 |
perf symbols: Consolidate symbol fixup issue
After copying Arm64's perf archive with object files and perf.data file to x86 laptop, the x86's perf kernel symbol resolution fails. It outputs 'unknown' for all symbols parsing. This issue is root caused by the function elf__needs_adjust_symbols(), x86 perf tool uses one weak version, Arm64 (and powerpc) has rewritten their own version. elf__needs_adjust_symbols() decides if need to parse symbols with the relative offset address; but x86 building uses the weak function which misses to check for the elf type 'ET_DYN', so that it cannot parse symbols in Arm DSOs due to the wrong result from elf__needs_adjust_symbols(). The DSO parsing should not depend on any specific architecture perf building; e.g. x86 perf tool can parse Arm and Arm64 DSOs, vice versa. And confirmed by Naveen N. Rao that powerpc64 kernels are not being built as ET_DYN anymore and change to ET_EXEC. This patch removes the arch specific functions for Arm64 and powerpc and changes elf__needs_adjust_symbols() as a common function. In the common elf__needs_adjust_symbols(), it checks an extra condition 'ET_DYN' for elf header type. With this fixing, the Arm64 DSO can be parsed properly with x86's perf tool. Before: # perf script main 3258 1 branches: 0 [unknown] ([unknown]) => ffff800010c4665c [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c46670 [unknown] ([kernel.kallsyms]) => ffff800010c4eaec [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eaec [unknown] ([kernel.kallsyms]) => ffff800010c4eb00 [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eb08 [unknown] ([kernel.kallsyms]) => ffff800010c4e780 [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4e7a0 [unknown] ([kernel.kallsyms]) => ffff800010c4eeac [unknown] ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eebc [unknown] ([kernel.kallsyms]) => ffff800010c4ed80 [unknown] ([kernel.kallsyms]) After: # perf script main 3258 1 branches: 0 [unknown] ([unknown]) => ffff800010c4665c coresight_timeout+0x54 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c46670 coresight_timeout+0x68 ([kernel.kallsyms]) => ffff800010c4eaec etm4_enable_hw+0x3cc ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eaec etm4_enable_hw+0x3cc ([kernel.kallsyms]) => ffff800010c4eb00 etm4_enable_hw+0x3e0 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eb08 etm4_enable_hw+0x3e8 ([kernel.kallsyms]) => ffff800010c4e780 etm4_enable_hw+0x60 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4e7a0 etm4_enable_hw+0x80 ([kernel.kallsyms]) => ffff800010c4eeac etm4_enable+0x2d4 ([kernel.kallsyms]) main 3258 1 branches: ffff800010c4eebc etm4_enable+0x2e4 ([kernel.kallsyms]) => ffff800010c4ed80 etm4_enable+0x1a8 ([kernel.kallsyms]) v3: Changed to check for ET_DYN across all architectures. v2: Fixed Arm64 and powerpc native building. Reported-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Allison Randal <allison@lohutok.net> Cc: Enrico Weigelt <info@metux.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Cc: John Garry <john.garry@huawei.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Thomas Richter <tmricht@linux.vnet.ibm.com> Link: http://lore.kernel.org/lkml/20200306015759.10084-1-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ian Rogers
|
d4953f7ef1 |
perf parse-events: Fix 3 use after frees found with clang ASAN
Reproducible with a clang asan build and then running perf test in particular 'Parse event definition strings'. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: clang-built-linux@googlegroups.com Link: http://lore.kernel.org/lkml/20200314170356.62914-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Ingo Molnar
|
d1c9f7d117 |
perf/core improvements and fixes:
perf record: Alexey Budankov: - Fix binding of AIO user space buffers to nodes maps: Dominik b. Czarnota: - Fix off by one in strncpy() size argument. Arnaldo Carvalho de Melo: - Use strstarts() to look for Android libraries. Ian Rogers: - Give synthetic mmap events an inode generation. man pages: Ian Rogers: - Set man page date to last git commit. perf test: Ian Rogers: - Print if shell directory isn't present. perf report: Jin Yao: - Fix no branch type statistics report issue. perf expr: Jiri Olsa: - Fix copy/paste mistake vendor events: Kan Liang: - Support metric constraints. vendor events intel: Kan Liang: - Add NO_NMI_WATCHDOG metric constraint. vendor events s390: Thomas Richter: - Add new deflate counters for IBM z15. ARM cs-etm: Leo Yan: - Last branch improvements. intel-pt: Adrian Hunter: - Update intel-pt.txt file with new location of the documentation. - Add Intel PT man page references. - Rename intel-pt.txt and put it in man page format. perl scripting: Michael Petlan: - Add common_callchain to fix argument order. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQR2GiIUctdOfX2qHhGyPKLppCJ+JwUCXnFBiwAKCRCyPKLppCJ+ J4sOAQDTh5w3GFDOKzFHLqXWOE9mlsXnS7tHdkypuRweBpuQXQEA0Sq125ludwe7 pzZ1MFqZJ85lw0mfDqBV9E1PlgQz8Q8= =1uH9 -----END PGP SIGNATURE----- Merge tag 'perf-core-for-mingo-5.7-20200317' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: perf record: Alexey Budankov: - Fix binding of AIO user space buffers to nodes maps: Dominik b. Czarnota: - Fix off by one in strncpy() size argument. Arnaldo Carvalho de Melo: - Use strstarts() to look for Android libraries. Ian Rogers: - Give synthetic mmap events an inode generation. man pages: Ian Rogers: - Set man page date to last git commit. perf test: Ian Rogers: - Print if shell directory isn't present. perf report: Jin Yao: - Fix no branch type statistics report issue. perf expr: Jiri Olsa: - Fix copy/paste mistake vendor events: Kan Liang: - Support metric constraints. vendor events intel: Kan Liang: - Add NO_NMI_WATCHDOG metric constraint. vendor events s390: Thomas Richter: - Add new deflate counters for IBM z15. ARM cs-etm: Leo Yan: - Last branch improvements. intel-pt: Adrian Hunter: - Update intel-pt.txt file with new location of the documentation. - Add Intel PT man page references. - Rename intel-pt.txt and put it in man page format. perl scripting: Michael Petlan: - Add common_callchain to fix argument order. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Conflicts: tools/perf/util/map.c |
||
|
Ingo Molnar
|
409e1a3140 |
Merge branch 'perf/urgent' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|
Jiri Olsa
|
59a08b4b3b |
perf expr: Fix copy/paste mistake
Copy/paste leftover from recent refactor.
Fixes:
|
||
|
Jin Yao
|
c3b10649a8 |
perf report: Fix no branch type statistics report issue
Previously we could get the report of branch type statistics.
For example:
# perf record -j any,save_type ...
# t perf report --stdio
#
# Branch Statistics:
#
COND_FWD: 40.6%
COND_BWD: 4.1%
CROSS_4K: 24.7%
CROSS_2M: 12.3%
COND: 44.7%
UNCOND: 0.0%
IND: 6.1%
CALL: 24.5%
RET: 24.7%
But now for the recent perf, it can't report the branch type statistics.
It's a regression issue caused by commit
|
||
|
Ian Rogers
|
3b7a15b064 |
perf tools: Give synthetic mmap events an inode generation
When mmap2 events are synthesized the ino_generation field isn't being
set leading to uninitialized memory being compared.
Caught with clang's -fsanitize=memory:
==124733==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x55a96a6a65cc in __dso_id__cmp tools/perf/util/dsos.c:23:6
#1 0x55a96a6a81d5 in dso_id__cmp tools/perf/util/dsos.c:38:9
#2 0x55a96a6a717f in __dso__cmp_long_name tools/perf/util/dsos.c:74:15
#3 0x55a96a6a6c4c in __dsos__findnew_link_by_longname_id tools/perf/util/dsos.c:106:12
#4 0x55a96a6a851e in __dsos__findnew_by_longname_id tools/perf/util/dsos.c:178:9
#5 0x55a96a6a7798 in __dsos__find_id tools/perf/util/dsos.c:191:9
#6 0x55a96a6a7b57 in __dsos__findnew_id tools/perf/util/dsos.c:251:20
#7 0x55a96a6a7a57 in dsos__findnew_id tools/perf/util/dsos.c:259:17
#8 0x55a96a7776ae in machine__findnew_dso_id tools/perf/util/machine.c:2709:9
#9 0x55a96a77dfcf in map__new tools/perf/util/map.c:193:10
#10 0x55a96a77240a in machine__process_mmap2_event tools/perf/util/machine.c:1670:8
#11 0x55a96a7741a3 in machine__process_event tools/perf/util/machine.c:1882:9
#12 0x55a96a6aee39 in perf_event__process tools/perf/util/event.c:454:9
#13 0x55a96a87d633 in perf_tool__process_synth_event tools/perf/util/synthetic-events.c:63:9
#14 0x55a96a87f131 in perf_event__synthesize_mmap_events tools/perf/util/synthetic-events.c:403:7
#15 0x55a96a8815d6 in __event__synthesize_thread tools/perf/util/synthetic-events.c:548:9
#16 0x55a96a882bff in __perf_event__synthesize_threads tools/perf/util/synthetic-events.c:681:3
#17 0x55a96a881ec2 in perf_event__synthesize_threads tools/perf/util/synthetic-events.c:750:9
#18 0x55a96a562b26 in synth_all tools/perf/tests/mmap-thread-lookup.c:136:9
#19 0x55a96a5623b1 in mmap_events tools/perf/tests/mmap-thread-lookup.c:174:8
#20 0x55a96a561fa0 in test__mmap_thread_lookup tools/perf/tests/mmap-thread-lookup.c:230:2
#21 0x55a96a52c182 in run_test tools/perf/tests/builtin-test.c:378:9
#22 0x55a96a52afc1 in test_and_print tools/perf/tests/builtin-test.c:408:9
#23 0x55a96a52966e in __cmd_test tools/perf/tests/builtin-test.c:603:4
#24 0x55a96a52855d in cmd_test tools/perf/tests/builtin-test.c:747:9
#25 0x55a96a2844d4 in run_builtin tools/perf/perf.c:312:11
#26 0x55a96a282bd0 in handle_internal_command tools/perf/perf.c:364:8
#27 0x55a96a284097 in run_argv tools/perf/perf.c:408:2
#28 0x55a96a282223 in main tools/perf/perf.c:538:3
Uninitialized value was stored to memory at
#1 0x55a96a6a18f7 in dso__new_id tools/perf/util/dso.c:1230:14
#2 0x55a96a6a78ee in __dsos__addnew_id tools/perf/util/dsos.c:233:20
#3 0x55a96a6a7bcc in __dsos__findnew_id tools/perf/util/dsos.c:252:21
#4 0x55a96a6a7a57 in dsos__findnew_id tools/perf/util/dsos.c:259:17
#5 0x55a96a7776ae in machine__findnew_dso_id tools/perf/util/machine.c:2709:9
#6 0x55a96a77dfcf in map__new tools/perf/util/map.c:193:10
#7 0x55a96a77240a in machine__process_mmap2_event tools/perf/util/machine.c:1670:8
#8 0x55a96a7741a3 in machine__process_event tools/perf/util/machine.c:1882:9
#9 0x55a96a6aee39 in perf_event__process tools/perf/util/event.c:454:9
#10 0x55a96a87d633 in perf_tool__process_synth_event tools/perf/util/synthetic-events.c:63:9
#11 0x55a96a87f131 in perf_event__synthesize_mmap_events tools/perf/util/synthetic-events.c:403:7
#12 0x55a96a8815d6 in __event__synthesize_thread tools/perf/util/synthetic-events.c:548:9
#13 0x55a96a882bff in __perf_event__synthesize_threads tools/perf/util/synthetic-events.c:681:3
#14 0x55a96a881ec2 in perf_event__synthesize_threads tools/perf/util/synthetic-events.c:750:9
#15 0x55a96a562b26 in synth_all tools/perf/tests/mmap-thread-lookup.c:136:9
#16 0x55a96a5623b1 in mmap_events tools/perf/tests/mmap-thread-lookup.c:174:8
#17 0x55a96a561fa0 in test__mmap_thread_lookup tools/perf/tests/mmap-thread-lookup.c:230:2
#18 0x55a96a52c182 in run_test tools/perf/tests/builtin-test.c:378:9
#19 0x55a96a52afc1 in test_and_print tools/perf/tests/builtin-test.c:408:9
Uninitialized value was stored to memory at
#0 0x55a96a7725af in machine__process_mmap2_event tools/perf/util/machine.c:1646:25
#1 0x55a96a7741a3 in machine__process_event tools/perf/util/machine.c:1882:9
#2 0x55a96a6aee39 in perf_event__process tools/perf/util/event.c:454:9
#3 0x55a96a87d633 in perf_tool__process_synth_event tools/perf/util/synthetic-events.c:63:9
#4 0x55a96a87f131 in perf_event__synthesize_mmap_events tools/perf/util/synthetic-events.c:403:7
#5 0x55a96a8815d6 in __event__synthesize_thread tools/perf/util/synthetic-events.c:548:9
#6 0x55a96a882bff in __perf_event__synthesize_threads tools/perf/util/synthetic-events.c:681:3
#7 0x55a96a881ec2 in perf_event__synthesize_threads tools/perf/util/synthetic-events.c:750:9
#8 0x55a96a562b26 in synth_all tools/perf/tests/mmap-thread-lookup.c:136:9
#9 0x55a96a5623b1 in mmap_events tools/perf/tests/mmap-thread-lookup.c:174:8
#10 0x55a96a561fa0 in test__mmap_thread_lookup tools/perf/tests/mmap-thread-lookup.c:230:2
#11 0x55a96a52c182 in run_test tools/perf/tests/builtin-test.c:378:9
#12 0x55a96a52afc1 in test_and_print tools/perf/tests/builtin-test.c:408:9
#13 0x55a96a52966e in __cmd_test tools/perf/tests/builtin-test.c:603:4
#14 0x55a96a52855d in cmd_test tools/perf/tests/builtin-test.c:747:9
#15 0x55a96a2844d4 in run_builtin tools/perf/perf.c:312:11
#16 0x55a96a282bd0 in handle_internal_command tools/perf/perf.c:364:8
#17 0x55a96a284097 in run_argv tools/perf/perf.c:408:2
#18 0x55a96a282223 in main tools/perf/perf.c:538:3
Uninitialized value was created by a heap allocation
#0 0x55a96a22f60d in malloc llvm/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:925:3
#1 0x55a96a882948 in __perf_event__synthesize_threads tools/perf/util/synthetic-events.c:655:15
#2 0x55a96a881ec2 in perf_event__synthesize_threads tools/perf/util/synthetic-events.c:750:9
#3 0x55a96a562b26 in synth_all tools/perf/tests/mmap-thread-lookup.c:136:9
#4 0x55a96a5623b1 in mmap_events tools/perf/tests/mmap-thread-lookup.c:174:8
#5 0x55a96a561fa0 in test__mmap_thread_lookup tools/perf/tests/mmap-thread-lookup.c:230:2
#6 0x55a96a52c182 in run_test tools/perf/tests/builtin-test.c:378:9
#7 0x55a96a52afc1 in test_and_print tools/perf/tests/builtin-test.c:408:9
#8 0x55a96a52966e in __cmd_test tools/perf/tests/builtin-test.c:603:4
#9 0x55a96a52855d in cmd_test tools/perf/tests/builtin-test.c:747:9
#10 0x55a96a2844d4 in run_builtin tools/perf/perf.c:312:11
#11 0x55a96a282bd0 in handle_internal_command tools/perf/perf.c:364:8
#12 0x55a96a284097 in run_argv tools/perf/perf.c:408:2
#13 0x55a96a282223 in main tools/perf/perf.c:538:3
SUMMARY: MemorySanitizer: use-of-uninitialized-value tools/perf/util/dsos.c:23:6 in __dso_id__cmp
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: clang-built-linux@googlegroups.com
Link: http://lore.kernel.org/lkml/20200313053129.131264-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Ian Rogers
|
b2bf666070 |
perf test: Print if shell directory isn't present
If the shell test directory isn't present the exit code will be 255 but with no error messages printed. Add an error message. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20200313005602.45236-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Alexey Budankov
|
44d462acc0 |
perf record: Fix binding of AIO user space buffers to nodes
Correct maxnode parameter value passed to mbind() syscall to be the
amount of node mask bits to analyze plus 1. Dynamically allocate node
mask memory depending on the index of node of cpu being profiled.
Fixes:
|
||
Michael Petlan
|
67439d555f |
perf scripting perl: Add common_callchain to fix argument order
Since common_callchain has been added to the argument array, we need to
reflect it in perl-based scripts, because otherwise the following args
would be shifted and thus incorrect. E.g. rw-by-pid and calculation of
read and written bytes:
Before:
read counts by pid:
pid comm # reads bytes_requested bytes_read
------ -------------------- ----------- ---------- ----------
19301 dd 4 424510450039736 0
After:
read counts by pid:
pid comm # reads bytes_requested bytes_read
------ -------------------- ----------- ---------- ----------
19301 dd 4 9536 4341
Committer testing:
To see before after first do:
# perf script record rw-by-pid
^C
Now you'll have a perf.data file to report on, then do before and after
using:
# perf script report rw-by-pid
Anbd notice the bytes_request/bytes_read, as above.
Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Benjamin Salon <bsalon@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
LPU-Reference: 20200311132836.12693-1-mpetlan@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
|
Adrian Hunter
|
ec2eab9deb |
perf intel-pt: Update intel-pt.txt file with new location of the documentation
Make it easy for people looking in intel-pt.txt to find the new file. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200311122034.3697-4-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
870d325b15 |
perf intel-pt: Add Intel PT man page references
Add references to Intel PT man page in man pages of associated tools. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200311122034.3697-3-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Adrian Hunter
|
97256d1a2a |
perf intel-pt: Rename intel-pt.txt and put it in man page format
Make the Intel PT documentation into a man page. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200311122034.3697-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Ian Rogers
|
0c2d041232 |
perf doc: Set man page date to last git commit
Currently the man page dates reflect the date the man pages were built. This patch adjusts the date so that the date is when then man page last had a commit against it. The date is generated using 'git log'. Committer testing: $ git log -1 --pretty="format:%cd" --date=short tools/perf/Documentation/perf-top.txt 2020-01-14 Before: rm -rf /tmp/build/perf mkdir -p /tmp/build/perf make -C tools/perf O=/tmp/build/perf/ install $ date Wed 11 Mar 2020 10:21:19 AM -03 $ man perf-top | tail -1 perf 03/11/2020 PERF-TOP(1) $ After: rm -rf /tmp/build/perf mkdir -p /tmp/build/perf make -C tools/perf O=/tmp/build/perf/ install $ date $ date Wed 11 Mar 2020 10:24:06 AM -03 $ man perf-top | tail -1 perf 2020-01-14 PERF-TOP(1) $ Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masanari Iida <standby24x7@gmail.com> Cc: Mukesh Ojha <mojha@codeaurora.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lore.kernel.org/lkml/20200311052110.23132-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Leo Yan
|
bc010dd657 |
perf cs-etm: Fix unsigned variable comparison to zero
The variable 'offset' in function cs_etm__sample() is u64 type, it's not appropriate to check it with 'while (offset > 0)'; this patch changes to 'while (offset)'. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-6-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Leo Yan
|
695378b567 |
perf cs-etm: Optimize copying last branches
If an instruction range packet can generate multiple instruction samples, these samples share the same last branches; it's not necessary to copy the same last branches repeatedly for these samples within the same packet. This patch moves out the last branches copying from function cs_etm__synth_instruction_sample(), and execute it prior to generating instruction samples. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-5-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Leo Yan
|
c9f5baa136 |
perf cs-etm: Correct synthesizing instruction samples
When 'etm->instructions_sample_period' is less than 'tidq->period_instructions', the function cs_etm__sample() cannot handle this case properly with its logic. Let's see below flow as an example: - If we set itrace option '--itrace=i4', then function cs_etm__sample() has variables with initialized values: tidq->period_instructions = 0 etm->instructions_sample_period = 4 - When the first packet is coming: packet->instr_count = 10; the number of instructions executed in this packet is 10, thus update period_instructions as below: tidq->period_instructions = 0 + 10 = 10 instrs_over = 10 - 4 = 6 offset = 10 - 6 - 1 = 3 tidq->period_instructions = instrs_over = 6 - When the second packet is coming: packet->instr_count = 10; in the second pass, assume 10 instructions in the trace sample again: tidq->period_instructions = 6 + 10 = 16 instrs_over = 16 - 4 = 12 offset = 10 - 12 - 1 = -3 -> the negative value tidq->period_instructions = instrs_over = 12 So after handle these two packets, there have below issues: The first issue is that cs_etm__instr_addr() returns the address within the current trace sample of the instruction related to offset, so the offset is supposed to be always unsigned value. But in fact, function cs_etm__sample() might calculate a negative offset value (in handling the second packet, the offset is -3) and pass to cs_etm__instr_addr() with u64 type with a big positive integer. The second issue is it only synthesizes 2 samples for sample period = 4. In theory, every packet has 10 instructions so the two packets have total 20 instructions, 20 instructions should generate 5 samples (4 x 5 = 20). This is because cs_etm__sample() only calls once cs_etm__synth_instruction_sample() to generate instruction sample per range packet. This patch fixes the logic in function cs_etm__sample(); the basic idea for handling coming packet is: - To synthesize the first instruction sample, it combines the left instructions from the previous packet and the head of the new packet; then generate continuous samples with sample period; - At the tail of the new packet, if it has the rest instructions, these instructions will be left for the sequential sample. Suggested-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-4-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Leo Yan
|
f1410028c7 |
perf cs-etm: Continuously record last branch
Every time synthesize instruction sample, the last branch recording will be reset. This is fine if the instruction period is big enough, for example if use the option '--itrace=i100000', the last branch array is reset for every sample with 100000 instructions per period; before generate the next instruction sample, there has the sufficient packets coming to fill the last branch array. On the other hand, if set a very small period, the packets will be significantly reduced between two continuous instruction samples, thus the last branch array is almost empty for new instruction sample by frequently resetting. To allow the last branches to work properly for any instruction periods, this patch avoids to reset the last branch for every instruction sample and only reset it when flush the trace data. The last branches will be reset only for two cases, one is for trace starting, another case is for discontinuous trace; other cases can keep recording last branches for continuous instruction samples. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-3-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Leo Yan
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d01751563c |
perf cs-etm: Swap packets for instruction samples
If use option '--itrace=iNNN' with Arm CoreSight trace data, perf tool fails inject instruction samples; the root cause is the packets are only swapped for branch samples and last branches but not for instruction samples, so the new coming packets cannot be properly handled for only synthesizing instruction samples. To fix this issue, this patch refactors the code with a new function cs_etm__packet_swap() which is used to swap packets and adds the condition for instruction samples. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Walker <robert.walker@arm.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lore.kernel.org/lkml/20200219021811.20067-2-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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bdadd647cb |
perf map: Use strstarts() to look for Android libraries
And add the '/' to avoid looking at things like "/system/libsomething", when all we want to know if it is like "/system/lib/something", i.e. if it is in that system library dir. Using strstarts() avoids off-by-one errors like recently fixed in this file. Since this adds the '/' I separated this patch, another patch will make this consistent by removing other strncmp(str, prefix, manually calculated prefix length) usage. Reported-by: Dominik Czarnota <dominik.b.czarnota@gmail.com> Acked-by: Dominik Czarnota <dominik.b.czarnota@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: Link: http://lore.kernel.org/lkml/CABEVAa0_q-uC0vrrqpkqRHy_9RLOSXOJxizMLm1n5faHRy2AeA@mail.gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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disconnect3d
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b8fdcfb5a1 |
perf map: Fix off by one in strncpy() size argument
This patch fixes an off-by-one error in strncpy size argument in
tools/perf/util/map.c. The issue is that in:
strncmp(filename, "/system/lib/", 11)
the passed string literal: "/system/lib/" has 12 bytes (without the NULL
byte) and the passed size argument is 11. As a result, the logic won't
match the ending "/" byte and will pass filepaths that are stored in
other directories e.g. "/system/libmalicious/bin" or just
"/system/libmalicious".
This functionality seems to be present only on Android. I assume the
/system/ directory is only writable by the root user, so I don't think
this bug has much (or any) security impact.
Fixes:
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Kan Liang
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b95fcd2c1c |
perf vendor events intel: Add NO_NMI_WATCHDOG metric constraint
Add NO_NMI_WATCHDOG metric constraint to Page_Walks_Utilization for Sky Lake
and Cascade Lake.
Committer testing:
On a Lenovo T480S, Intel(R) Core(TM) i7-8650U Kaby Lake, that looking at x86's
mapfile.csv file is a:
$ grep -w skylake tools/perf/pmu-events/arch/x86/mapfile.csv
GenuineIntel-6-[4589]E,v24,skylake,core
$
So uses the constraint added in this patch in this file:
tools/perf/pmu-events/arch/x86/skylake/skl-metrics.json
Before:
# perf stat -a -M Page_Walks_Utilization sleep 2
Performance counter stats for 'system wide':
<not counted> itlb_misses.walk_pending (0.00%)
<not counted> dtlb_load_misses.walk_pending (0.00%)
<not counted> dtlb_store_misses.walk_pending (0.00%)
<not counted> ept.walk_pending (0.00%)
<not counted> cycles (0.00%)
2.001750514 seconds time elapsed
Some events weren't counted. Try disabling the NMI watchdog:
echo 0 > /proc/sys/kernel/nmi_watchdog
perf stat ...
echo 1 > /proc/sys/kernel/nmi_watchdog
The events in group usually have to be from the same PMU. Try reorganizing the group.
#
After:
# perf stat -a -M Page_Walks_Utilization sleep 2
Splitting metric group Page_Walks_Utilization into standalone metrics.
Try disabling the NMI watchdog to comply NO_NMI_WATCHDOG metric constraint:
echo 0 > /proc/sys/kernel/nmi_watchdog
perf stat ...
echo 1 > /proc/sys/kernel/nmi_watchdog
,
Performance counter stats for 'system wide':
36,883,102 itlb_misses.walk_pending # 0.1 Page_Walks_Utilization (79.99%)
123,104,146 dtlb_load_misses.walk_pending (80.02%)
13,720,795 dtlb_store_misses.walk_pending (79.99%)
0 ept.walk_pending (79.99%)
1,519,948,400 cycles (80.01%)
2.002170780 seconds time elapsed
#
Before and after, if we disable the nmi_watchdog we get:
# echo 0 > /proc/sys/kernel/nmi_watchdog
# perf stat -a -M Page_Walks_Utilization sleep 2
Performance counter stats for 'system wide':
33,721,658 itlb_misses.walk_pending # 0.1 Page_Walks_Utilization
84,070,996 dtlb_load_misses.walk_pending
9,816,071 dtlb_store_misses.walk_pending
0 ept.walk_pending
704,920,899 cycles
2.002331670 seconds time elapsed
#
More information about the metric expressions:
# perf stat -v -a -M Page_Walks_Utilization sleep 2
Using CPUID GenuineIntel-6-8E-A
metric expr ( itlb_misses.walk_pending + dtlb_load_misses.walk_pending + dtlb_store_misses.walk_pending + ept.walk_pending ) / ( 2 * cycles ) for Page_Walks_Utilization
found event itlb_misses.walk_pending
found event dtlb_load_misses.walk_pending
found event dtlb_store_misses.walk_pending
found event ept.walk_pending
found event cycles
adding {itlb_misses.walk_pending,dtlb_load_misses.walk_pending,dtlb_store_misses.walk_pending,ept.walk_pending,cycles}:W
-> cpu/umask=0x10,(null)=0x186a3,event=0x85/
-> cpu/umask=0x10,(null)=0x1e8483,event=0x8/
-> cpu/umask=0x10,(null)=0x1e8483,event=0x49/
-> cpu/umask=0x10,(null)=0x1e8483,event=0x4f/
itlb_misses.walk_pending: 8085772 16010162799 16010162799
dtlb_load_misses.walk_pending: 28134579 16010162799 16010162799
dtlb_store_misses.walk_pending: 7276535 16010162799 16010162799
ept.walk_pending: 2 16010162799 16010162799
cycles: 315140605 16010162799 16010162799
Performance counter stats for 'system wide':
8,085,772 itlb_misses.walk_pending # 0.1 Page_Walks_Utilization
28,134,579 dtlb_load_misses.walk_pending
7,276,535 dtlb_store_misses.walk_pending
2 ept.walk_pending
315,140,605 cycles
2.002333181 seconds time elapsed
#
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Link: http://lore.kernel.org/lkml/1582581564-184429-6-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Kan Liang
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ab483d8bc8 |
perf metricgroup: Support metric constraint
Some metric groups have metric constraints. A metric group can be scheduled as a group only when some constraints are applied. For example, Page_Walks_Utilization has a metric constraint, "NO_NMI_WATCHDOG". When NMI watchdog is disabled, the metric group can be scheduled as a group. Otherwise, splitting the metric group into standalone metrics. Add a new function, metricgroup__has_constraint(), to check whether all constraints are applied. If not, splitting the metric group into standalone metrics. Currently, only one constraint, "NO_NMI_WATCHDOG", is checked. Print a warning for the metric group with the constraint, when NMI WATCHDOG is enabled. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/1582581564-184429-5-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Kan Liang
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2a14c1bf01 |
perf util: Factor out sysctl__nmi_watchdog_enabled()
The NMI watchdog status is required for metric group constraint examination. Factor out sysctl__nmi_watchdog_enabled() to retrieve the NMI watchdog status. Users may count more than one metric group each time. If so, the NMI watchdog status may be retrieved several times. To reduce the overhead, cache the NMI watchdog status. Replace the NMI watchdog status checking in print_footer() by sysctl__nmi_watchdog_enabled(). Suggested-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/1582581564-184429-4-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Kan Liang
|
f742634ab4 |
perf metricgroup: Factor out metricgroup__add_metric_weak_group()
Factor out metricgroup__add_metric_weak_group() which add metrics into a weak group. The change can improve code readability. Because following patch will introduce a function which add standalone metrics. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/1582581564-184429-3-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Kan Liang
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03fe02b113 |
perf jevents: Support metric constraint
A new field "MetricConstraint" is introduced in JSON event list. Extend jevents to parse the field and save the value in metric_constraint. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/1582581564-184429-2-git-send-email-kan.liang@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Thomas Richter
|
e7950166e4 |
perf vendor events s390: Add new deflate counters for IBM z15
Add support for new deflate counters: - Counter 247: cycles CPU spent obtaining access to Deflate unit - Counter 252: cycles CPU is using Deflate unit - Counter 264: Increments by one for every DEFLATE CONVERSION CALL instruction executed. - Counter 265: Increments by one for every DEFLATE CONVERSION CALL instruction executed that ended in Condition Codes 0, 1 or 2. Also adjust the some crypto counter description to latest documentation. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Link: http://lore.kernel.org/lkml/20200310142937.32045-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Jin Yao
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f787feff69 |
perf block-info: Support color ops to print block percents in color
It would be nice to print the block percents with colors. This patch supports the 'Sampled Cycles%' and 'Avg Cycles%' printed in colors. For example, perf record -b ... perf report --total-cycles or perf report --total-cycles --stdio percent > 5%, colored in red percent > 0.5%, colored in green percent < 0.5%, default color Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200202141655.32053-5-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Jin Yao
|
cca0cc76f5 |
perf block-info: Allow selecting which columns to report and its order
Currently we use a predefined array to set the block info output formats, it's fixed and inflexible. This patch adds two parameters "block_hpps" and "nr_hpps" in block_info__create_report and other static functions, in order to let user decide which columns to report and with specified report ordering. It should be more flexible. Buffers will be allocated to contain the new fmts, of course, we need to release them before perf exits. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200202141655.32053-4-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Jin Yao
|
a8a9f6dc0d |
perf diff: Use __block_info__cmp() to replace block_pair_cmp()
'perf diff' uses block_pair_cmp() to compare two blocks. But block_info__cmp() has the similar functionality and it's a bit more complete. This patch removes block_pair_cmp() and uses __block_info__cmp() instead. __block_info__cmp() is wrapped by block_info__cmp() and it doesn't receives a perf_hpp_fmt parameter. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200202141655.32053-3-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |