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perf streams: Get the evsel_streams by evsel_idx

Browse source 
In previous patch, we have created evsel_streams array.

This patch returns the specified evsel_streams according to the
evsel_idx.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20201009022845.13141-3-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2020-10-09 10:28:40 +08:00 committed by Arnaldo Carvalho de Melo
parent 480accbb17
commit dd1d841810
2 changed files with 16 additions and 0 deletions
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13
tools/perf/util/stream.c
View file

@ -162,3 +162,16 @@ struct evlist_streams *evlist__create_streams(struct evlist *evlist,
return els;
}
struct evsel_streams *evsel_streams__entry(struct evlist_streams *els,
int evsel_idx)
{
struct evsel_streams *es = els->ev_streams;
for (int i = 0; i < els->nr_evsel; i++) {
if (es[i].evsel_idx == evsel_idx)
return &es[i];
}
return NULL;
}

3
tools/perf/util/stream.h
View file

@ -27,4 +27,7 @@ void evlist_streams__delete(struct evlist_streams *els);
struct evlist_streams *evlist__create_streams(struct evlist *evlist,
int nr_streams_max);
struct evsel_streams *evsel_streams__entry(struct evlist_streams *els,
int evsel_idx);
#endif /* __PERF_STREAM_H */