diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2024-08-20 08:45:03 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2024-08-28 18:07:20 -0300 |
| commit | 1a5474a779798f6ba9d798469326ebfa6b4a8fae (patch) | |
| tree | c53775462e378cd1bf679a9b30f9b931bd75b275 /tools/perf/util/machine.c | |
| parent | 0fe2b18ddc40bf8fbcd96dab651822dbadc1cd85 (diff) | |
| download | lwn-1a5474a779798f6ba9d798469326ebfa6b4a8fae.tar.gz lwn-1a5474a779798f6ba9d798469326ebfa6b4a8fae.zip | |
perf tools: Print lost samples due to BPF filter
Print the actual dropped sample count in the event stat.
$ sudo perf record -o- -e cycles --filter 'period < 10000' \
-e instructions --filter 'ip > 0x8000000000000000' perf test -w noploop | \
perf report --stat -i-
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.058 MB - ]
Aggregated stats:
TOTAL events: 469
MMAP events: 268 (57.1%)
COMM events: 2 ( 0.4%)
EXIT events: 1 ( 0.2%)
SAMPLE events: 16 ( 3.4%)
MMAP2 events: 22 ( 4.7%)
LOST_SAMPLES events: 2 ( 0.4%)
KSYMBOL events: 89 (19.0%)
BPF_EVENT events: 39 ( 8.3%)
ATTR events: 2 ( 0.4%)
FINISHED_ROUND events: 1 ( 0.2%)
ID_INDEX events: 1 ( 0.2%)
THREAD_MAP events: 1 ( 0.2%)
CPU_MAP events: 1 ( 0.2%)
EVENT_UPDATE events: 2 ( 0.4%)
TIME_CONV events: 1 ( 0.2%)
FEATURE events: 20 ( 4.3%)
FINISHED_INIT events: 1 ( 0.2%)
cycles stats:
SAMPLE events: 2
LOST_SAMPLES (BPF) events: 4010
instructions stats:
SAMPLE events: 14
LOST_SAMPLES (BPF) events: 3990
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240820154504.128923-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/machine.c')
| -rw-r--r-- | tools/perf/util/machine.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index cd79a830abae..5783b96fb988 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -642,8 +642,9 @@ int machine__process_lost_event(struct machine *machine __maybe_unused, int machine__process_lost_samples_event(struct machine *machine __maybe_unused, union perf_event *event, struct perf_sample *sample) { - dump_printf(": id:%" PRIu64 ": lost samples :%" PRI_lu64 "\n", - sample->id, event->lost_samples.lost); + dump_printf(": id:%" PRIu64 ": lost samples :%" PRI_lu64 "%s\n", + sample->id, event->lost_samples.lost, + event->header.misc & PERF_RECORD_MISC_LOST_SAMPLES_BPF ? " (BPF)" : ""); return 0; } |