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| author | Jiri Olsa <jolsa@kernel.org> | 2019-03-05 16:25:32 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-03-06 18:18:17 -0300 |
| commit | 90a86bde97ba050cb3c9ccb215252ee2d2d705fa (patch) | |
| tree | 85ddcfbad66f9a70b8b52cdcdb789d23628ab85d /tools/perf/util/pmu.c | |
| parent | 2634958586368dcbf09c0d2a17dee02d1fc53e0d (diff) | |
| download | linux-stable-90a86bde97ba050cb3c9ccb215252ee2d2d705fa.tar.gz linux-stable-90a86bde97ba050cb3c9ccb215252ee2d2d705fa.tar.bz2 linux-stable-90a86bde97ba050cb3c9ccb215252ee2d2d705fa.zip | |
perf tools: Read and store caps/max_precise in perf_pmu
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>
Diffstat (limited to 'tools/perf/util/pmu.c')
| -rw-r--r-- | tools/perf/util/pmu.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 51d437f55d18..6199a3174ab9 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -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); |