There's no need to iterate the whole list of groups,
when adding new events. The currently created group
is the one we want to add.

Signed-off-by: Jiri Olsa <[email protected]>
---
 tools/perf/util/metricgroup.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 8cbcc5e05fef..66f25362702d 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -811,17 +811,19 @@ static int metricgroup__add_metric(const char *metric, 
bool metric_no_group,
        if (ret)
                return ret;
 
-       list_for_each_entry(eg, group_list, nd) {
-               if (events->len > 0)
-                       strbuf_addf(events, ",");
+       if (events->len > 0)
+               strbuf_addf(events, ",");
 
-               if (eg->has_constraint) {
-                       metricgroup__add_metric_non_group(events,
-                                                         &eg->pctx);
-               } else {
-                       metricgroup__add_metric_weak_group(events,
-                                                          &eg->pctx);
-               }
+       /*
+        * Even if we add multiple groups through the runtime
+        * param, they share same events.
+        */
+       if (eg->has_constraint) {
+               metricgroup__add_metric_non_group(events,
+                                                 &eg->pctx);
+       } else {
+               metricgroup__add_metric_weak_group(events,
+                                                  &eg->pctx);
        }
        return 0;
 }
-- 
2.25.4

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