1208b93dd901bafe2526fa9db005bbc30e7ae83a
10 Commits
| Author | SHA1 | Message | Date | |
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Zhengjun Xing
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9a0b36266f |
perf stat: Add topdown metrics in the default perf stat on the hybrid machine
Topdown metrics are missed in the default perf stat on the hybrid machine,
add Topdown metrics in default perf stat for hybrid systems.
Currently, we support the perf metrics Topdown for the p-core PMU in the
perf stat default, the perf metrics Topdown support for e-core PMU will be
implemented later separately. Refactor the code adds two x86 specific
functions. Widen the size of the event name column by 7 chars, so that all
metrics after the "#" become aligned again.
The perf metrics topdown feature is supported on the cpu_core of ADL. The
dedicated perf metrics counter and the fixed counter 3 are used for the
topdown events. Adding the topdown metrics doesn't trigger multiplexing.
Before:
# ./perf stat -a true
Performance counter stats for 'system wide':
53.70 msec cpu-clock # 25.736 CPUs utilized
80 context-switches # 1.490 K/sec
24 cpu-migrations # 446.951 /sec
52 page-faults # 968.394 /sec
2,788,555 cpu_core/cycles/ # 51.931 M/sec
851,129 cpu_atom/cycles/ # 15.851 M/sec
2,974,030 cpu_core/instructions/ # 55.385 M/sec
416,919 cpu_atom/instructions/ # 7.764 M/sec
586,136 cpu_core/branches/ # 10.916 M/sec
79,872 cpu_atom/branches/ # 1.487 M/sec
14,220 cpu_core/branch-misses/ # 264.819 K/sec
7,691 cpu_atom/branch-misses/ # 143.229 K/sec
0.002086438 seconds time elapsed
After:
# ./perf stat -a true
Performance counter stats for 'system wide':
61.39 msec cpu-clock # 24.874 CPUs utilized
76 context-switches # 1.238 K/sec
24 cpu-migrations # 390.968 /sec
52 page-faults # 847.097 /sec
2,753,695 cpu_core/cycles/ # 44.859 M/sec
903,899 cpu_atom/cycles/ # 14.725 M/sec
2,927,529 cpu_core/instructions/ # 47.690 M/sec
428,498 cpu_atom/instructions/ # 6.980 M/sec
581,299 cpu_core/branches/ # 9.470 M/sec
83,409 cpu_atom/branches/ # 1.359 M/sec
13,641 cpu_core/branch-misses/ # 222.216 K/sec
8,008 cpu_atom/branch-misses/ # 130.453 K/sec
14,761,308 cpu_core/slots/ # 240.466 M/sec
3,288,625 cpu_core/topdown-retiring/ # 22.3% retiring
1,323,323 cpu_core/topdown-bad-spec/ # 9.0% bad speculation
5,477,470 cpu_core/topdown-fe-bound/ # 37.1% frontend bound
4,679,199 cpu_core/topdown-be-bound/ # 31.7% backend bound
646,194 cpu_core/topdown-heavy-ops/ # 4.4% heavy operations # 17.9% light operations
1,244,999 cpu_core/topdown-br-mispredict/ # 8.4% branch mispredict # 0.5% machine clears
3,891,800 cpu_core/topdown-fetch-lat/ # 26.4% fetch latency # 10.7% fetch bandwidth
1,879,034 cpu_core/topdown-mem-bound/ # 12.7% memory bound # 19.0% Core bound
0.002467839 seconds time elapsed
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220721065706.2886112-6-zhengjun.xing@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Kan Liang
|
cdb204ad42 |
perf x86 evlist: Add default hybrid events for perf stat
Provide a new solution to replace the reverted commit
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Kan Liang
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a9c1ecdabc |
perf evlist: Always use arch_evlist__add_default_attrs()
Current perf stat uses the evlist__add_default_attrs() to add the generic default attrs, and uses arch_evlist__add_default_attrs() to add the Arch specific default attrs, e.g., Topdown for x86. It works well for the non-hybrid platforms. However, for a hybrid platform, the hard code generic default attrs don't work. Uses arch_evlist__add_default_attrs() to replace the evlist__add_default_attrs(). The arch_evlist__add_default_attrs() is modified to invoke the same __evlist__add_default_attrs() for the generic default attrs. No functional change. Add default_null_attrs[] to indicate the arch specific attrs. No functional change for the arch specific default attrs either. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Acked-by: Ian Rogers <irogers@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20220721065706.2886112-4-zhengjun.xing@linux.intel.com Signed-off-by: Xing Zhengjun <zhengjun.xing@linux.intel.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Kan Liang
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e0e14cdff3 |
perf parse-events: Move slots event for the hybrid platform too
The commit
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Kan Liang
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e7d1374ed5 |
perf parse-events: Support different format of the topdown event name
The evsel->name may have a different format for a topdown event, a pure
topdown name (e.g., topdown-fe-bound), or a PMU name + a topdown name
(e.g., cpu/topdown-fe-bound/). The cpu/topdown-fe-bound/ kind format
isn't supported by the arch_evlist__leader(). This format is a very
common format for a hybrid platform, which requires specifying the PMU
name for each event.
Without the patch,
$ perf stat -e '{instructions,slots,cpu/topdown-fe-bound/}' -a sleep 1
Performance counter stats for 'system wide':
<not counted> instructions
<not counted> slots
<not supported> cpu/topdown-fe-bound/
1.003482041 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.
With the patch,
$ perf stat -e '{instructions,slots,cpu/topdown-fe-bound/}' -a sleep 1
Performance counter stats for 'system wide':
157,383,996 slots
25,011,711 instructions
27,441,686 cpu/topdown-fe-bound/
1.003530890 seconds time elapsed
Fixes:
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Ian Rogers
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bc355822f0 |
perf parse-events: Move slots only with topdown
If slots isn't with a topdown event then moving it is unnecessary. For
example {instructions, slots} is re-ordered:
$ perf stat -e '{instructions,slots}' -a sleep 1
Performance counter stats for 'system wide':
936,600,825 slots
144,440,968 instructions
1.006061423 seconds time elapsed
Which can break tools expecting the command line order to match the
printed order. It is necessary to move the slots event first when it
appears with topdown events. Add extra checking so that the slots event
is only moved in the case of there being a topdown event like:
$ perf stat -e '{instructions,slots,topdown-fe-bound}' -a sleep 1
Performance counter stats for 'system wide':
2427568570 slots
300927614 instructions
551021649 topdown-fe-bound
1.001771803 seconds time elapsed
Fixes:
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Ian Rogers
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7bd1da15d2 |
perf parse-events: Ignore case in topdown.slots check
An issue with icelakex metrics:
https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tree/tools/perf/pmu-events/arch/x86/icelakex/icx-metrics.json?h=perf/core&id=65eab2bc7dab326ee892ec5a4c749470b368b51a#n48
That causes the slots not to be first.
Fixes:
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Ian Rogers
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94dbfd6781 |
perf parse-events: Architecture specific leader override
Currently topdown events must appear after a slots event:
$ perf stat -e '{slots,topdown-fe-bound}' /bin/true
Performance counter stats for '/bin/true':
3,183,090 slots
986,133 topdown-fe-bound
Reversing the events yields:
$ perf stat -e '{topdown-fe-bound,slots}' /bin/true
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (topdown-fe-bound).
For metrics the order of events is determined by iterating over a
hashmap, and so slots isn't guaranteed to be first which can yield this
error.
Change the set_leader in parse-events, called when a group is closed, so
that rather than always making the first event the leader, if the slots
event exists then it is made the leader. It is then moved to the head of
the evlist otherwise it won't be opened in the correct order.
The result is:
$ perf stat -e '{topdown-fe-bound,slots}' /bin/true
Performance counter stats for '/bin/true':
3,274,795 slots
1,001,702 topdown-fe-bound
A problem with this approach is the slots event is identified by name,
names can be overwritten like 'cpu/slots,name=foo/' and this causes the
leader change to fail.
The change also modifies and fixes mixed groups like, with the change:
$ perf stat -e '{instructions,slots,topdown-fe-bound}' -a -- sleep 2
Performance counter stats for 'system wide':
5574985410 slots
971981616 instructions
1348461887 topdown-fe-bound
2.001263120 seconds time elapsed
Without the change:
$ perf stat -e '{instructions,slots,topdown-fe-bound}' -a -- sleep 2
Performance counter stats for 'system wide':
<not counted> instructions
<not counted> slots
<not supported> topdown-fe-bound
2.006247990 seconds time elapsed
Something that may be undesirable here is that the events are reordered
in the output.
Reviewed-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vineet Singh <vineet.singh@intel.com>
Link: http://lore.kernel.org/lkml/20211130174945.247604-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Kan Liang
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5f148e7c6a |
perf stat: Add Topdown metrics L2 events as default events
The Topdown Microarchitecture Analysis (TMA) Method is a structured
analysis methodology to identify critical performance bottlenecks in
out-of-order processors.
The Topdown metrics L1 event was added as default in
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Kan Liang
|
42641d6f4d |
perf stat: Add Topdown metrics events as default events
The Topdown Microarchitecture Analysis (TMA) Method is a structured
analysis methodology to identify critical performance bottlenecks in
out-of-order processors. From the Ice Lake and later platforms, the
Topdown information can be retrieved from the dedicated "metrics"
register, which isn't impacted by other events. Also, the Topdown
metrics support both per thread/process and per core measuring. Adding
Topdown metrics events as default events can enrich the default
measuring information, and would not cost any extra multiplexing.
Introduce arch_evlist__add_default_attrs() to allow architecture
specific default events. Add the Topdown metrics events in the X86
specific arch_evlist__add_default_attrs(). Other architectures can add
their own default events later separately.
With the patch:
$ perf stat sleep 1
Performance counter stats for 'sleep 1':
0.82 msec task-clock:u # 0.001 CPUs utilized
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
61 page-faults:u # 0.074 M/sec
319,941 cycles:u # 0.388 GHz
242,802 instructions:u # 0.76 insn per cycle
54,380 branches:u # 66.028 M/sec
4,043 branch-misses:u # 7.43% of all branches
1,585,555 slots:u # 1925.189 M/sec
238,941 topdown-retiring:u # 15.0% retiring
410,378 topdown-bad-spec:u # 25.8% bad speculation
634,222 topdown-fe-bound:u # 39.9% frontend bound
304,675 topdown-be-bound:u # 19.2% backend bound
1.001791625 seconds time elapsed
0.000000000 seconds user
0.001572000 seconds sys
Signed-off-by: Kan Liang <kan.liang@linux.intel.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: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/20210121133752.118327-1-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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