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Commit e2bdbe80 authored by Jin Yao's avatar Jin Yao Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarJin Yao <yao.jin@linux.intel.com>
Tested-by: default avatarArnaldo 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 2996123e

tools/perf/util/evlist.c

+15 −0
Original line number Original line Diff line number Diff line
@@ -1795,3 +1795,18 @@ bool perf_evlist__exclude_kernel(struct perf_evlist *evlist) 




	return true;

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

					    union perf_event *event);





bool perf_evlist__exclude_kernel(struct perf_evlist *evlist);

bool perf_evlist__exclude_kernel(struct perf_evlist *evlist);



void perf_evlist__force_leader(struct perf_evlist *evlist);



#endif /* __PERF_EVLIST_H */
 
#endif /* __PERF_EVLIST_H */