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perf pmus: Add function to return count of core PMUs

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Add perf_pmus__num_core_pmus that will count core PMUs holding the
result in a static. Reuse for perf_pmus__num_mem_pmus.

Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kang Minchul <tegongkang@gmail.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230527072210.2900565-33-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2023-05-27 00:22:08 -07:00 committed by Arnaldo Carvalho de Melo
parent 1dd5f78d83
commit 002c484575
2 changed files with 15 additions and 7 deletions
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21
tools/perf/util/pmus.c
View File

@ -229,14 +229,8 @@ const struct perf_pmu *perf_pmus__pmu_for_pmu_filter(const char *str)
int perf_pmus__num_mem_pmus(void)
{
struct perf_pmu *pmu = NULL;
int count = 0;
/* All core PMUs are for mem events. */
while ((pmu = perf_pmus__scan_core(pmu)) != NULL)
count++;
return count;
return perf_pmus__num_core_pmus();
}
/** Struct for ordering events as output in perf list. */
@ -488,6 +482,19 @@ bool perf_pmus__has_hybrid(void)
return has_hybrid;
}
int perf_pmus__num_core_pmus(void)
{
static int count;
if (!count) {
struct perf_pmu *pmu = NULL;
while ((pmu = perf_pmus__scan_core(pmu)) != NULL)
count++;
}
return count;
}
struct perf_pmu *evsel__find_pmu(const struct evsel *evsel)
{
struct perf_pmu *pmu = evsel->pmu;

1
tools/perf/util/pmus.h
View File

@ -19,5 +19,6 @@ int perf_pmus__num_mem_pmus(void);
void perf_pmus__print_pmu_events(const struct print_callbacks *print_cb, void *print_state);
bool perf_pmus__have_event(const char *pname, const char *name);
bool perf_pmus__has_hybrid(void);
int perf_pmus__num_core_pmus(void);
#endif /* __PMUS_H */