diff options
Diffstat (limited to 'tools/perf/util/pmu.c')
| -rw-r--r-- | tools/perf/util/pmu.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index 9a1c7e63e663..0112e1c36418 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -1890,7 +1890,11 @@ int perf_pmu__caps_parse(struct perf_pmu *pmu) const char *sysfs = sysfs__mountpoint(); DIR *caps_dir; struct dirent *evt_ent; - int nr_caps = 0; + + if (pmu->caps_initialized) + return pmu->nr_caps; + + pmu->nr_caps = 0; if (!sysfs) return -1; @@ -1898,8 +1902,10 @@ int perf_pmu__caps_parse(struct perf_pmu *pmu) snprintf(caps_path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH "%s/caps", sysfs, pmu->name); - if (stat(caps_path, &st) < 0) + if (stat(caps_path, &st) < 0) { + pmu->caps_initialized = true; return 0; /* no error if caps does not exist */ + } caps_dir = opendir(caps_path); if (!caps_dir) @@ -1926,13 +1932,14 @@ int perf_pmu__caps_parse(struct perf_pmu *pmu) continue; } - nr_caps++; + pmu->nr_caps++; fclose(file); } closedir(caps_dir); - return nr_caps; + pmu->caps_initialized = true; + return pmu->nr_caps; } void perf_pmu__warn_invalid_config(struct perf_pmu *pmu, __u64 config, |