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authorNamhyung Kim <namhyung@kernel.org>2023-03-15 02:42:31 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2023-03-15 17:08:35 +0300
commit27c6f2455b29f27c8daf209ec8bdf0ac2c567b74 (patch)
tree71fd2e97d118f4868283d30c72c2c4ec39318273 /tools/lib
parentd180aa56b50dd243dec89b24d23e0a59c3f0c0eb (diff)
downloadlinux-27c6f2455b29f27c8daf209ec8bdf0ac2c567b74.tar.xz
perf record: Record dropped sample count
When it uses bpf filters, event might drop some samples. It'd be nice if it can report how many samples it lost. As LOST_SAMPLES event can carry the similar information, let's use it for bpf filters. To indicate it's from BPF filters, add a new misc flag for that and do not display cpu load warnings. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Hao Luo <haoluo@google.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: James Clark <james.clark@arm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Song Liu <song@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20230314234237.3008956-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/perf/include/perf/event.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h
index ad47d7b31046..51b9338f4c11 100644
--- a/tools/lib/perf/include/perf/event.h
+++ b/tools/lib/perf/include/perf/event.h
@@ -70,6 +70,8 @@ struct perf_record_lost {
__u64 lost;
};
+#define PERF_RECORD_MISC_LOST_SAMPLES_BPF (1 << 15)
+
struct perf_record_lost_samples {
struct perf_event_header header;
__u64 lost;