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| author | Namhyung Kim <namhyung@kernel.org> | 2023-03-14 16:42:31 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-03-15 11:08:35 -0300 |
| commit | 27c6f2455b29f27c8daf209ec8bdf0ac2c567b74 (patch) | |
| tree | 71fd2e97d118f4868283d30c72c2c4ec39318273 /tools/perf/util/bpf-filter.c | |
| parent | d180aa56b50dd243dec89b24d23e0a59c3f0c0eb (diff) | |
| download | linux-stable-27c6f2455b29f27c8daf209ec8bdf0ac2c567b74.tar.gz linux-stable-27c6f2455b29f27c8daf209ec8bdf0ac2c567b74.tar.bz2 linux-stable-27c6f2455b29f27c8daf209ec8bdf0ac2c567b74.zip | |
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/perf/util/bpf-filter.c')
| -rw-r--r-- | tools/perf/util/bpf-filter.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/util/bpf-filter.c b/tools/perf/util/bpf-filter.c index f20e1bc03778..7bd6f2e41513 100644 --- a/tools/perf/util/bpf-filter.c +++ b/tools/perf/util/bpf-filter.c @@ -69,6 +69,13 @@ int perf_bpf_filter__destroy(struct evsel *evsel) return 0; } +u64 perf_bpf_filter__lost_count(struct evsel *evsel) +{ + struct sample_filter_bpf *skel = evsel->bpf_skel; + + return skel ? skel->bss->dropped : 0; +} + struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(unsigned long sample_flags, enum perf_bpf_filter_op op, unsigned long val) |