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perf stat: Introduce bpf_counter_ops->disable()

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Introduce bpf_counter_ops->disable(), which is used stop counting the
event.

Committer notes:

Added a dummy bpf_counter__disable() to the python binding to avoid
having 'perf test python' failing.

bpf_counter isn't supported in the python binding.

Signed-off-by: Song Liu <song@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: kernel-team@fb.com
Link: https://lore.kernel.org/r/20210425214333.1090950-6-song@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Song Liu
2021-04-25 14:43:33 -07:00
committed by Arnaldo Carvalho de Melo
parent 01bd8efcec
commit 5508c9dae2
4 changed files with 43 additions and 0 deletions
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6
tools/perf/util/python.c
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@@ -90,6 +90,7 @@ int metricgroup__copy_metric_events(struct evlist *evlist, struct cgroup *cgrp,
*/
void bpf_counter__destroy(struct evsel *evsel);
int bpf_counter__install_pe(struct evsel *evsel, int cpu, int fd);
int bpf_counter__disable(struct evsel *evsel);
void bpf_counter__destroy(struct evsel *evsel __maybe_unused)
{
@@ -100,6 +101,11 @@ int bpf_counter__install_pe(struct evsel *evsel __maybe_unused, int cpu __maybe_
return 0;
}
int bpf_counter__disable(struct evsel *evsel __maybe_unused)
{
return 0;
}
/*
* Support debug printing even though util/debug.c is not linked. That means
* implementing 'verbose' and 'eprintf'.