diff options
Diffstat (limited to 'tools/perf/bench')
| -rw-r--r-- | tools/perf/bench/pmu-scan.c | 50 |
1 files changed, 29 insertions, 21 deletions
diff --git a/tools/perf/bench/pmu-scan.c b/tools/perf/bench/pmu-scan.c index 51cae2d03353..c7d207f8e13c 100644 --- a/tools/perf/bench/pmu-scan.c +++ b/tools/perf/bench/pmu-scan.c @@ -22,6 +22,7 @@ struct pmu_scan_result { int nr_aliases; int nr_formats; int nr_caps; + bool is_core; }; static const struct option options[] = { @@ -53,6 +54,7 @@ static int save_result(void) r = results + nr_pmus; r->name = strdup(pmu->name); + r->is_core = pmu->is_core; r->nr_caps = pmu->nr_caps; r->nr_aliases = 0; @@ -72,7 +74,7 @@ static int save_result(void) return 0; } -static int check_result(void) +static int check_result(bool core_only) { struct pmu_scan_result *r; struct perf_pmu *pmu; @@ -81,6 +83,9 @@ static int check_result(void) for (int i = 0; i < nr_pmus; i++) { r = &results[i]; + if (core_only && !r->is_core) + continue; + pmu = perf_pmus__find(r->name); if (pmu == NULL) { pr_err("Cannot find PMU %s\n", r->name); @@ -130,7 +135,6 @@ static int run_pmu_scan(void) struct timeval start, end, diff; double time_average, time_stddev; u64 runtime_us; - unsigned int i; int ret; init_stats(&stats); @@ -142,26 +146,30 @@ static int run_pmu_scan(void) return -1; } - for (i = 0; i < iterations; i++) { - gettimeofday(&start, NULL); - perf_pmus__scan(NULL); - gettimeofday(&end, NULL); - - timersub(&end, &start, &diff); - runtime_us = diff.tv_sec * USEC_PER_SEC + diff.tv_usec; - update_stats(&stats, runtime_us); - - ret = check_result(); - perf_pmus__destroy(); - if (ret < 0) - break; + for (int j = 0; j < 2; j++) { + bool core_only = (j == 0); + + for (unsigned int i = 0; i < iterations; i++) { + gettimeofday(&start, NULL); + if (core_only) + perf_pmus__scan_core(NULL); + else + perf_pmus__scan(NULL); + gettimeofday(&end, NULL); + timersub(&end, &start, &diff); + runtime_us = diff.tv_sec * USEC_PER_SEC + diff.tv_usec; + update_stats(&stats, runtime_us); + + ret = check_result(core_only); + perf_pmus__destroy(); + if (ret < 0) + break; + } + time_average = avg_stats(&stats); + time_stddev = stddev_stats(&stats); + pr_info(" Average%s PMU scanning took: %.3f usec (+- %.3f usec)\n", + core_only ? " core" : "", time_average, time_stddev); } - - time_average = avg_stats(&stats); - time_stddev = stddev_stats(&stats); - pr_info(" Average PMU scanning took: %.3f usec (+- %.3f usec)\n", - time_average, time_stddev); - delete_result(); return 0; } |