perf stat: Introduce ':b' modifier

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Introduce 'b' modifier to event parser, which means use BPF program to
manage this event. This is the same as --bpf-counters option, but only
applies to this event. For example,

  perf stat -e cycles:b,cs               # use bpf for cycles, but not cs
  perf stat -e cycles,cs --bpf-counters  # use bpf for both cycles and cs

Suggested-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Song Liu <song@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/r/20210425214333.1090950-5-song@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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This commit is contained in:

Song Liu 2021-04-25 14:43:32 -07:00 • committed by Arnaldo Carvalho de Melo

parent 112cb56164

commit 01bd8efcec

4 changed files with 10 additions and 3 deletions

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2

tools/perf/util/bpf_counter.c

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1

tools/perf/util/evsel.h

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8

tools/perf/util/parse-events.c

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tools/perf/util/parse-events.l

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