[v4,06/35] perf pmu: Add is_core to pmu

Commit Message

Ian Rogers May 26, 2023, 9:53 p.m. UTC

Cache is_pmu_core in the pmu to avoid recomputation.

Signed-off-by: Ian Rogers <[e-mail]>
Reviewed-by: Kan Liang <[e-mail]>
---
 tools/perf/util/pmu.c | 7 ++++---
 tools/perf/util/pmu.h | 7 +++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

Patch

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 7392cec725bf..e8c0762c311a 100644
--- 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 f50919f1b34c..96236a79c6fd 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -59,6 +59,13 @@  struct perf_pmu {
 	 * @selectable: Can the PMU name be selected as if it were an event?
 	 */
 	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.