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perf branch: Extend branch type classification

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This updates the perf tool with generic branch type classification with new
ABI extender place holder i.e PERF_BR_EXTEND_ABI, the new 4 bit branch type
field i.e perf_branch_entry.new_type, new generic page fault related branch
types and some arch specific branch types as added earlier in the kernel.

Committer note:

Add an extra entry to the branch_type_name array to cope with
PERF_BR_EXTEND_ABI, to address build warnings on some compiler/systems,
like:

  75     8.89 ubuntu:20.04-x-powerpc64el    : FAIL gcc version 10.3.0 (Ubuntu 10.3.0-1ubuntu1~20.04)
        inlined from 'branch_type_stat_display' at util/branch.c:152:4:
    /usr/powerpc64le-linux-gnu/include/bits/stdio2.h:100:10: error: '%8s' directive argument is null [-Werror=format-overflow=]
      100 |   return __fprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt,
          |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      101 |    __va_arg_pack ());
          |    ~~~~~~~~~~~~~~~~~

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.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>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20220824044822.70230-7-anshuman.khandual@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Anshuman Khandual
2022-08-24 10:18:20 +05:30
committed by Arnaldo Carvalho de Melo
parent 1c96b6e45f
commit 0ddea8e2a0
5 changed files with 75 additions and 6 deletions
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16
tools/include/uapi/linux/perf_event.h
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@@ -255,9 +255,22 @@ enum {
PERF_BR_IRQ = 12, /* irq */
PERF_BR_SERROR = 13, /* system error */
PERF_BR_NO_TX = 14, /* not in transaction */
PERF_BR_EXTEND_ABI = 15, /* extend ABI */
PERF_BR_MAX,
};
enum {
PERF_BR_NEW_FAULT_ALGN = 0, /* Alignment fault */
PERF_BR_NEW_FAULT_DATA = 1, /* Data fault */
PERF_BR_NEW_FAULT_INST = 2, /* Inst fault */
PERF_BR_NEW_ARCH_1 = 3, /* Architecture specific */
PERF_BR_NEW_ARCH_2 = 4, /* Architecture specific */
PERF_BR_NEW_ARCH_3 = 5, /* Architecture specific */
PERF_BR_NEW_ARCH_4 = 6, /* Architecture specific */
PERF_BR_NEW_ARCH_5 = 7, /* Architecture specific */
PERF_BR_NEW_MAX,
};
#define PERF_SAMPLE_BRANCH_PLM_ALL \
(PERF_SAMPLE_BRANCH_USER|\
PERF_SAMPLE_BRANCH_KERNEL|\
@@ -1375,7 +1388,8 @@ struct perf_branch_entry {
abort:1, /* transaction abort */
cycles:16, /* cycle count to last branch */
type:4, /* branch type */
reserved:40;
new_type:4, /* additional branch type */
reserved:36;
};
union perf_sample_weight {