perf bpf-filter: Split per-task filter use case

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If the target is a list of tasks, it can use a shared hash map for
filter expressions.  The key of the filter map is an integer index like
in an array.  A separate pid_hash map is added to get the index for the
filter map using the tgid.

For system-wide mode including per-cpu or per-user targets are handled
by the single entry map like before.

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/20240703223035.2024586-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

...

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

parent 966854e72f

commit eb1693b115

3 changed files with 168 additions and 40 deletions

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186

tools/perf/util/bpf-filter.c

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1

tools/perf/util/bpf_skel/sample-filter.h

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21

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

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