perf pmu: Add is_core to pmu

Cache is_pmu_core in the pmu to avoid recomputation.

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/20230527072210.2900565-6-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 7392cec..e8c0762 100644 (file)
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -952,6 +952,7 @@ static struct perf_pmu *pmu_lookup(int dirfd, const char *lookup_name)
        }
 
        pmu->type = type;
+       pmu->is_core = is_pmu_core(name);
        pmu->is_uncore = pmu_is_uncore(dirfd, name);
        if (pmu->is_uncore)
                pmu->id = pmu_id(name);
@@ -1659,12 +1660,12 @@ bool is_pmu_hybrid(const char *name)
 
 bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu)
 {
-       return is_pmu_core(pmu->name);
+       return pmu->is_core;
 }
 
 bool perf_pmu__supports_wildcard_numeric(const struct perf_pmu *pmu)
 {
-       return is_pmu_core(pmu->name);
+       return pmu->is_core;
 }
 
 bool perf_pmu__auto_merge_stats(const struct perf_pmu *pmu)
@@ -1723,7 +1724,7 @@ void print_pmu_events(const struct print_callbacks *print_cb, void *print_state)
        pmu = NULL;
        j = 0;
        while ((pmu = perf_pmu__scan(pmu)) != NULL) {
-               bool is_cpu = is_pmu_core(pmu->name);
+               bool is_cpu = pmu->is_core;
 
                list_for_each_entry(event, &pmu->aliases, list) {
                        aliases[j].event = event;

diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index f50919f..96236a7 100644 (file)
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -60,6 +60,13 @@ struct perf_pmu {
         */
        bool selectable;
        /**
+        * @is_core: Is the PMU the core CPU PMU? Determined by the name being
+        * "cpu" or by the presence of
+        * <sysfs>/bus/event_source/devices/<name>/cpus. There may be >1 core
+        * PMU on systems like Intel hybrid.
+        */
+       bool is_core;
+       /**
         * @is_uncore: Is the PMU not within the CPU core? Determined by the
         * presence of <sysfs>/bus/event_source/devices/<name>/cpumask.
         */