perf tools: Read and store caps/max_precise in perf_pmu (90a86bde) · Commits · 戴 / test

Read the caps/max_precise value and store it in struct perf_pmu to be used when setting the maximum precise_ip field in following patch. Signed-off-by:

Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de> Cc: Nageswara R Sastry <nasastry@in.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lkml.kernel.org/r/20190305152536.21035-5-jolsa@kernel.org Signed-off-by:

Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/pmu.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -752,6 +752,19 @@ perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
		return NULL;
		}

		static int pmu_max_precise(const char *name)
		{
		char path[PATH_MAX];
		int max_precise = -1;

		scnprintf(path, PATH_MAX,
		"bus/event_source/devices/%s/caps/max_precise",
		name);

		sysfs__read_int(path, &max_precise);
		return max_precise;
		}

		static struct perf_pmu pmu_lookup(const char name)
		{
		struct perf_pmu *pmu;
		@@ -784,6 +797,7 @@ static struct perf_pmu pmu_lookup(const char name)
		pmu->name = strdup(name);
		pmu->type = type;
		pmu->is_uncore = pmu_is_uncore(name);
		pmu->max_precise = pmu_max_precise(name);
		pmu_add_cpu_aliases(&aliases, pmu);

		INIT_LIST_HEAD(&pmu->format);

tools/perf/util/pmu.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -26,6 +26,7 @@ struct perf_pmu {
		__u32 type;
		bool selectable;
		bool is_uncore;
		int max_precise;
		struct perf_event_attr *default_config;
		struct cpu_map *cpus;
		struct list_head format; /* HEAD struct perf_pmu_format -> list */

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