diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2022-06-16 11:06:23 -0700 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-06-28 09:08:31 +0200 |
| commit | 119a784c81270eb88e573174ed2209225d646656 (patch) | |
| tree | 6fa3da6264de67a39be33724c2785c045d6d0bfb /arch/x86/events/perf_event.h | |
| parent | f0fe9f3c7abcc946a676dfb295478c50312523c2 (diff) | |
perf/core: Add a new read format to get a number of lost samples
Sometimes we want to know an accurate number of samples even if it's
lost. Currenlty PERF_RECORD_LOST is generated for a ring-buffer which
might be shared with other events. So it's hard to know per-event
lost count.
Add event->lost_samples field and PERF_FORMAT_LOST to retrieve it from
userspace.
Original-patch-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220616180623.1358843-1-namhyung@kernel.org
Diffstat (limited to 'arch/x86/events/perf_event.h')
0 files changed, 0 insertions, 0 deletions