diff options
Diffstat (limited to 'kernel/events')
-rw-r--r-- | kernel/events/core.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index e499b4e..9e0773d 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -5975,6 +5975,39 @@ void perf_event_aux_event(struct perf_event *event, unsigned long head, } /* + * Lost/dropped samples logging + */ +void perf_log_lost_samples(struct perf_event *event, u64 lost) +{ + struct perf_output_handle handle; + struct perf_sample_data sample; + int ret; + + struct { + struct perf_event_header header; + u64 lost; + } lost_samples_event = { + .header = { + .type = PERF_RECORD_LOST_SAMPLES, + .misc = 0, + .size = sizeof(lost_samples_event), + }, + .lost = lost, + }; + + perf_event_header__init_id(&lost_samples_event.header, &sample, event); + + ret = perf_output_begin(&handle, event, + lost_samples_event.header.size); + if (ret) + return; + + perf_output_put(&handle, lost_samples_event); + perf_event__output_id_sample(event, &handle, &sample); + perf_output_end(&handle); +} + +/* * IRQ throttle logging */ |