lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 25 Aug 2020 07:35:10 +0800 From: Jin Yao <yao.jin@...ux.intel.com> To: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com, alexander.shishkin@...ux.intel.com Cc: Linux-kernel@...r.kernel.org, ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com, Jin Yao <yao.jin@...ux.intel.com> Subject: [PATCH v4 4/7] perf util: 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@...ux.intel.com> --- v4: - New patch in v4. 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
Powered by blists - more mailing lists