From: Namhyung Kim <namhyung.kim@lge.com>

Like group_stats in hist_entry, total periods information also need
to be known to the leader.

Cc: Stephane Eranian <eranian@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/hist.c |   25 +++++++++++++++++++++++++
 tools/perf/util/hist.h |    1 +
 2 files changed, 26 insertions(+)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index a8f4c56261a0..5ae71429ba53 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -427,6 +427,28 @@ static void hist_entry__add_group_stat(struct perf_evsel *evsel,
 		hist_entry__add_stat(&iter->stat, &he->stat);
 }
 
+static void hists__add_group_stat(struct hists *hists)
+{
+	struct perf_evsel *evsel = hists_2_evsel(hists);
+	struct perf_evsel *leader = evsel->leader;
+	struct hists *leader_hists;
+
+	if (perf_evsel__is_group_leader(evsel))
+		return;
+
+	leader_hists = &leader->hists;
+
+	if (!leader_hists->group_stats) {
+		leader_hists->group_stats = calloc(leader->nr_children,
+						sizeof(struct events_stats));
+		if (!leader_hists->group_stats)
+			return;
+	}
+
+	memcpy(&leader_hists->group_stats[evsel->group_idx],
+	       &hists->stats, sizeof(struct events_stats));
+}
+
 /*
  * collapse the histogram
  */
@@ -546,6 +568,9 @@ static void __hists__collapse_resort(struct hists *hists, bool threaded)
 			hists__apply_filters(hists, n);
 		}
 	}
+
+	if (symbol_conf.report_group)
+		hists__add_group_stat(hists);
 }
 
 void hists__collapse_resort(struct hists *hists)
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 8594459594d9..5f81ee723c77 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -66,6 +66,7 @@ struct hists {
 	const char		*symbol_filter_str;
 	pthread_mutex_t		lock;
 	struct events_stats	stats;
+	struct events_stats	*group_stats;
 	u64			event_stream;
 	u16			col_len[HISTC_NR_COLS];
 };
-- 
1.7.10.4