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| author |   Jin Yao <yao.jin@linux.intel.com> | 2020-10-09 10:28:42 +0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-10-14 13:32:36 -0300 |
| commit | fa79aa6485816b86f37205fd5659616d64f8be7f (patch) | |
| tree | 644f6007f5388991544e9d602774e56c66e231ed /tools/perf | |
| parent | perf streams: Compare two streams (diff) | |
| download | wireguard-linux-fa79aa6485816b86f37205fd5659616d64f8be7f.tar.xz wireguard-linux-fa79aa6485816b86f37205fd5659616d64f8be7f.zip | |
perf streams: Link stream pair
In previous patch, we have created an evsel_streams for one event, and
top N hottest streams will be saved in a stream array in evsel_streams.
This patch compares total streams among two evsel_streams.
Once two streams are fully matched, they will be linked as a pair. From
the pair, we can know which streams are matched.
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20201009022845.13141-5-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/stream.c | 40 | ||||
| -rw-r--r-- | tools/perf/util/stream.h | 4 |
2 files changed, 44 insertions, 0 deletions
diff --git a/tools/perf/util/stream.c b/tools/perf/util/stream.c index e1c7d6c6126b..0d6a7452320a 100644 --- a/tools/perf/util/stream.c +++ b/tools/perf/util/stream.c @@ -175,3 +175,43 @@ struct evsel_streams *evsel_streams__entry(struct evlist_streams *els, return NULL; } + +static struct stream *stream__callchain_match(struct stream *base_stream, + struct evsel_streams *es_pair) +{ + for (int i = 0; i < es_pair->nr_streams; i++) { + struct stream *pair_stream = &es_pair->streams[i]; + + if (callchain_cnode_matched(base_stream->cnode, + pair_stream->cnode)) { + return pair_stream; + } + } + + return NULL; +} + +static struct stream *stream__match(struct stream *base_stream, + struct evsel_streams *es_pair) +{ + return stream__callchain_match(base_stream, es_pair); +} + +static void stream__link(struct stream *base_stream, struct stream *pair_stream) +{ + base_stream->pair_cnode = pair_stream->cnode; + pair_stream->pair_cnode = base_stream->cnode; +} + +void evsel_streams__match(struct evsel_streams *es_base, + struct evsel_streams *es_pair) +{ + for (int i = 0; i < es_base->nr_streams; i++) { + struct stream *base_stream = &es_base->streams[i]; + struct stream *pair_stream; + + pair_stream = stream__match(base_stream, es_pair); + if (pair_stream) + stream__link(base_stream, pair_stream); + } +} diff --git a/tools/perf/util/stream.h b/tools/perf/util/stream.h index f01335677479..cb131f41f5b1 100644 --- a/tools/perf/util/stream.h +++ b/tools/perf/util/stream.h @@ -6,6 +6,7 @@ struct stream { struct callchain_node *cnode; + struct callchain_node *pair_cnode; }; struct evsel_streams { @@ -30,4 +31,7 @@ struct evlist_streams *evlist__create_streams(struct evlist *evlist, struct evsel_streams *evsel_streams__entry(struct evlist_streams *els, int evsel_idx); +void evsel_streams__match(struct evsel_streams *es_base, + struct evsel_streams *es_pair); + #endif /* __PERF_STREAM_H */ |