diff options
| -rw-r--r-- | tools/perf/util/pmus.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/tools/perf/util/pmus.c b/tools/perf/util/pmus.c index a2032c1b7644..d891d72c824e 100644 --- a/tools/perf/util/pmus.c +++ b/tools/perf/util/pmus.c @@ -4,6 +4,7 @@ #include <subcmd/pager.h> #include <sys/types.h> #include <dirent.h> +#include <pthread.h> #include <string.h> #include <unistd.h> #include "debug.h" @@ -492,9 +493,35 @@ int perf_pmus__num_core_pmus(void) return count; } +static bool __perf_pmus__supports_extended_type(void) +{ + struct perf_pmu *pmu = NULL; + + if (perf_pmus__num_core_pmus() <= 1) + return false; + + while ((pmu = perf_pmus__scan_core(pmu)) != NULL) { + if (!is_event_supported(PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES | ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT))) + return false; + } + + return true; +} + +static bool perf_pmus__do_support_extended_type; + +static void perf_pmus__init_supports_extended_type(void) +{ + perf_pmus__do_support_extended_type = __perf_pmus__supports_extended_type(); +} + bool perf_pmus__supports_extended_type(void) { - return perf_pmus__num_core_pmus() > 1; + static pthread_once_t extended_type_once = PTHREAD_ONCE_INIT; + + pthread_once(&extended_type_once, perf_pmus__init_supports_extended_type); + + return perf_pmus__do_support_extended_type; } struct perf_pmu *evsel__find_pmu(const struct evsel *evsel) |