diff options
Diffstat (limited to 'driver/gator_events_perf_pmu.c')
| -rw-r--r-- | driver/gator_events_perf_pmu.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/driver/gator_events_perf_pmu.c b/driver/gator_events_perf_pmu.c index 322ebc4..da76a9c 100644 --- a/driver/gator_events_perf_pmu.c +++ b/driver/gator_events_perf_pmu.c @@ -19,6 +19,8 @@ int ccnt = 0; #define CNTMAX (6+1) +static DEFINE_MUTEX(perf_mutex); + unsigned long pmnc_enabled[CNTMAX]; unsigned long pmnc_event[CNTMAX]; unsigned long pmnc_count[CNTMAX]; @@ -122,12 +124,20 @@ static void gator_events_perf_pmu_online_dispatch(int cpu) static void gator_events_perf_pmu_offline_dispatch(int cpu) { int cnt; + struct perf_event * pe; for (cnt = 0; cnt < pmnc_counters; cnt++) { - if (per_cpu(pevent, cpu)[cnt] != NULL) { - perf_event_release_kernel(per_cpu(pevent, cpu)[cnt]); + pe = NULL; + mutex_lock(&perf_mutex); + if (per_cpu(pevent, cpu)[cnt]) { + pe = per_cpu(pevent, cpu)[cnt]; per_cpu(pevent, cpu)[cnt] = NULL; } + mutex_unlock(&perf_mutex); + + if (pe) { + perf_event_release_kernel(pe); + } } } @@ -139,7 +149,7 @@ static int gator_events_perf_pmu_start(void) for_each_present_cpu(cpu) { for (cnt = 0; cnt < pmnc_counters; cnt++) { per_cpu(pevent, cpu)[cnt] = NULL; - if (!pmnc_enabled[cnt] || pmnc_count[cnt] > 0) // Skip disabled counters and EBS counters + if (!pmnc_enabled[cnt]) // Skip disabled counters continue; per_cpu(perfPrev, cpu)[cnt] = 0; |