Commit e2bdbe80 authored May 21, 2018 by Jin Yao Committed by Arnaldo Carvalho de Melo May 21, 2018

perf evlist: Introduce force_leader() method



For non-explicit group (e.g. those created with -e '{eventA,eventB}'),
'perf report' supports a option '--group' which can enable group output.

We also need to support 'perf annotate' with the same '--group'.

Create a new function perf_evlist__force_leader() which contains common
code to force setting the group leader.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1526914666-31839-2-git-send-email-yao.jin@linux.intel.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 2996123e

tools/perf/util/evlist.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -1795,3 +1795,18 @@ bool perf_evlist__exclude_kernel(struct perf_evlist *evlist)

		return true;
		}

		/*
		* Events in data file are not collect in groups, but we still want
		* the group display. Set the artificial group and set the leader's
		* forced_leader flag to notify the display code.
		*/
		void perf_evlist__force_leader(struct perf_evlist *evlist)
		{
		if (!evlist->nr_groups) {
		struct perf_evsel *leader = perf_evlist__first(evlist);

		perf_evlist__set_leader(evlist);
		leader->forced_leader = true;
		}
		}

tools/perf/util/evlist.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -309,4 +309,7 @@ struct perf_evsel perf_evlist__event2evsel(struct perf_evlist evlist,
		union perf_event *event);

		bool perf_evlist__exclude_kernel(struct perf_evlist *evlist);

		void perf_evlist__force_leader(struct perf_evlist *evlist);

		#endif /* __PERF_EVLIST_H */

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