diff options
Diffstat (limited to 'tools/perf/arch/arm64')
| -rw-r--r-- | tools/perf/arch/arm64/util/pmu.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/tools/perf/arch/arm64/util/pmu.c b/tools/perf/arch/arm64/util/pmu.c index 477e513972a4..9e674cac5a73 100644 --- a/tools/perf/arch/arm64/util/pmu.c +++ b/tools/perf/arch/arm64/util/pmu.c @@ -3,8 +3,10 @@ #include <internal/cpumap.h> #include "../../../util/cpumap.h" #include "../../../util/pmu.h" +#include <api/fs/fs.h> +#include <math.h> -const struct pmu_events_table *pmu_events_table__find(void) +static struct perf_pmu *pmu__find_core_pmu(void) { struct perf_pmu *pmu = NULL; @@ -19,8 +21,37 @@ const struct pmu_events_table *pmu_events_table__find(void) if (pmu->cpus->nr != cpu__max_cpu().cpu) return NULL; - return perf_pmu__find_table(pmu); + return pmu; } return NULL; } + +const struct pmu_events_table *pmu_events_table__find(void) +{ + struct perf_pmu *pmu = pmu__find_core_pmu(); + + if (pmu) + return perf_pmu__find_table(pmu); + + return NULL; +} + +double perf_pmu__cpu_slots_per_cycle(void) +{ + char path[PATH_MAX]; + unsigned long long slots = 0; + struct perf_pmu *pmu = pmu__find_core_pmu(); + + if (pmu) { + scnprintf(path, PATH_MAX, + EVENT_SOURCE_DEVICE_PATH "%s/caps/slots", pmu->name); + /* + * The value of slots is not greater than 32 bits, but sysfs__read_int + * can't read value with 0x prefix, so use sysfs__read_ull instead. + */ + sysfs__read_ull(path, &slots); + } + + return slots ? (double)slots : NAN; +} |