Messages in this thread Patch in this message | | | From | Jin Yao <> | Subject | [PATCH v4 4/7] perf util: Link stream pair | Date | Tue, 26 May 2020 14:09:17 +0800 |
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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> --- tools/perf/util/stream.c | 53 ++++++++++++++++++++++++++++++++++++++++ tools/perf/util/stream.h | 4 +++ 2 files changed, 57 insertions(+)
diff --git a/tools/perf/util/stream.c b/tools/perf/util/stream.c index 7f538d1085ef..76896a790798 100644 --- a/tools/perf/util/stream.c +++ b/tools/perf/util/stream.c @@ -161,3 +161,56 @@ struct evsel_streams *evsel_streams_get(struct evsel_streams *es, 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, + enum stream_type stream_type) +{ + if (stream_type == STREAM_CALLCHAIN) + return stream_callchain_match(base_stream, es_pair); + + return NULL; +} + +static void stream_link(struct stream *base_stream, struct stream *pair_stream, + enum stream_type stream_type) +{ + if (stream_type == STREAM_CALLCHAIN) { + base_stream->pair_cnode = pair_stream->cnode; + pair_stream->pair_cnode = base_stream->cnode; + } +} + +void match_evsel_streams(struct evsel_streams *es_base, + struct evsel_streams *es_pair) +{ + if (es_base->stream_type != es_pair->stream_type) + return; + + 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, + es_base->stream_type); + if (pair_stream) { + stream_link(base_stream, pair_stream, + es_base->stream_type); + } + } +} diff --git a/tools/perf/util/stream.h b/tools/perf/util/stream.h index 705aa7cde3de..53f34e63f8fb 100644 --- a/tools/perf/util/stream.h +++ b/tools/perf/util/stream.h @@ -11,6 +11,7 @@ enum stream_type { struct stream { struct callchain_node *cnode; + struct callchain_node *pair_cnode; }; struct evsel_streams { @@ -30,4 +31,7 @@ struct evsel_streams *perf_evlist__create_streams(struct evlist *evlist, struct evsel_streams *evsel_streams_get(struct evsel_streams *es, int nr_evsel, int evsel_idx); +void match_evsel_streams(struct evsel_streams *es_base, + struct evsel_streams *es_pair); + #endif /* __PERF_STREAM_H */ -- 2.17.1
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