perf bpf-filter: Support separate lost counts for each filter

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As the BPF filter is shared between other processes, it should have its
own counter for each invocation.  Add a new array map (lost_count) to
save the count using the same index as the filter.  It should clear the
count before running the filter.

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>
Cc: Stephane Eranian <eranian@google.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20240703223035.2024586-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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This commit is contained in:

Namhyung Kim 2024-07-03 15:30:32 -07:00 • committed by Arnaldo Carvalho de Melo

parent 0715f65e94

commit 1ec6fd34e0

2 changed files with 48 additions and 4 deletions

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37

tools/perf/util/bpf-filter.c

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15

tools/perf/util/bpf_skel/sample_filter.bpf.c

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