6 files changed, 25 insertions, 1 deletions

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index dc8aee97a488..eddd5ebcd690 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -117,6 +117,9 @@ void __perf_evlist__set_leader(struct list_head *list)
         struct perf_evsel *evsel, *leader;
 
         leader = list_entry(list->next, struct perf_evsel, node);
+        evsel = list_entry(list->prev, struct perf_evsel, node);
+
+        leader->nr_members = evsel->idx - leader->idx + 1;
 
         list_for_each_entry(evsel, list, node) {
                 if (evsel != leader)
@@ -126,8 +129,10 @@ void __perf_evlist__set_leader(struct list_head *list)
 
 void perf_evlist__set_leader(struct perf_evlist *evlist)
 {
-        if (evlist->nr_entries)
+        if (evlist->nr_entries) {
+                evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0;
                 __perf_evlist__set_leader(&evlist->entries);
+        }
 }
 
 int perf_evlist__add_default(struct perf_evlist *evlist)
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 457e2350d21d..73579a25a93e 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -21,6 +21,7 @@ struct perf_evlist {
         struct list_head entries;
         struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
         int              nr_entries;
+        int              nr_groups;
         int              nr_fds;
         int              nr_mmaps;
         int              mmap_len;
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index cbf42322a27e..c9031ebf196e 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -74,6 +74,7 @@ struct perf_evsel {
         bool                    needs_swap;
         /* parse modifier helper */
         int                     exclude_GH;
+        int                     nr_members;
         struct perf_evsel       *leader;
         char                    *group_name;
 };
@@ -259,4 +260,9 @@ bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
 int perf_evsel__open_strerror(struct perf_evsel *evsel,
                               struct perf_target *target,
                               int err, char *msg, size_t size);
+
+static inline int perf_evsel__group_idx(struct perf_evsel *evsel)
+{
+        return evsel->idx - evsel->leader->idx;
+}
 #endif /* __PERF_EVSEL_H */
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 02f6421f03a0..4e0f5c2a9fda 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -884,6 +884,7 @@ int parse_events(struct perf_evlist *evlist, const char *str)
         if (!ret) {
                 int entries = data.idx - evlist->nr_entries;
                 perf_evlist__splice_list_tail(evlist, &data.list, entries);
+                evlist->nr_groups += data.nr_groups;
                 return 0;
         }
 
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 2cd2c42a69c5..8a4859315fd9 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -64,6 +64,7 @@ struct parse_events_term {
 struct parse_events_evlist {
         struct list_head list;
         int idx;
+        int nr_groups;
 };
 
 struct parse_events_terms {
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 9d43c86176ff..4de2fdca98c8 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -23,6 +23,14 @@ do { \
                 YYABORT; \
 } while (0)
 
+static inc_group_count(struct list_head *list,
+                       struct parse_events_evlist *data)
+{
+        /* Count groups only have more than 1 members */
+        if (!list_is_last(list->next, list))
+                data->nr_groups++;
+}
+
 %}
 
 %token PE_START_EVENTS PE_START_TERMS
@@ -123,6 +131,7 @@ PE_NAME '{' events '}'
 {
         struct list_head *list = $3;
 
+        inc_group_count(list, _data);
         parse_events__set_leader($1, list);
         $$ = list;
 }
@@ -131,6 +140,7 @@ PE_NAME '{' events '}'
 {
         struct list_head *list = $2;
 
+        inc_group_count(list, _data);
         parse_events__set_leader(NULL, list);
         $$ = list;
 }