diff options
| author | Jin Yao <yao.jin@linux.intel.com> | 2021-05-14 20:29:48 +0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-05-17 10:58:10 -0300 |
| commit | e119083bab80c2550065f6c0f10ba225a894595e (patch) | |
| tree | b25b45ca6bfd0002faa22852f94d132d2f32fe1b /tools/perf/util/header.h | |
| parent | f7d74ce32fc1b9b3cbf58c015009d1f616e60c23 (diff) | |
perf header: Support HYBRID_CPU_PMU_CAPS feature
Perf has supported the CPU_PMU_CAPS feature to display a list of CPU PMU
capabilities. But on a hybrid platform, it may have several CPU PMUs (such
as "cpu_core" and "cpu_atom"). The CPU_PMU_CAPS feature is hard to extend
to support multiple CPU PMUs well if it needs to be compatible for the case
of old perf data file + new perf tool.
So for better compatibility we now create a new feature HYBRID_CPU_PMU_CAPS
in the header.
For the perf.data generated on hybrid platform,
root@otcpl-adl-s-2:~# perf report --header-only -I
# cpu_core pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid
# cpu_atom pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid
# missing features: TRACING_DATA BRANCH_STACK GROUP_DESC AUXTRACE STAT CLOCKID DIR_FORMAT COMPRESSED CPU_PMU_CAPS CLOCK_DATA
For the perf.data generated on non-hybrid platform
root@kbl-ppc:~# perf report --header-only -I
# cpu pmu capabilities: branches=32, max_precise=3, pmu_name=skylake
# missing features: TRACING_DATA BRANCH_STACK GROUP_DESC AUXTRACE STAT CLOCKID DIR_FORMAT COMPRESSED CLOCK_DATA HYBRID_TOPOLOGY HYBRID_CPU_PMU_CAPS
Signed-off-by: Jin Yao <yao.jin@linux.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: 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/20210514122948.9472-3-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/header.h')
| -rw-r--r-- | tools/perf/util/header.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index 3f12ec0eb84e..ae6b1cf19a7d 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -46,6 +46,7 @@ enum { HEADER_CPU_PMU_CAPS, HEADER_CLOCK_DATA, HEADER_HYBRID_TOPOLOGY, + HEADER_HYBRID_CPU_PMU_CAPS, HEADER_LAST_FEATURE, HEADER_FEAT_BITS = 256, }; |