perf metric: Make compute_single function more precise

So far compute_single function relies on the fact, that there's only
single metric defined within evlist in all tests. In following patch we
will add test for metric group, so we need to be able to compute metric
by given name.

Adding the name argument to compute_single and iterating evlist and
evsel's expression to find the given metric.

Signed-off-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: John Garry <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Michael Petlan <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Clarke <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

1 files changed, 13 insertions, 9 deletions

diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c
index d7cc3bf64854..ea09628b9377 100644
--- a/tools/perf/tests/parse-metric.c
+++ b/tools/perf/tests/parse-metric.c
@@ -108,17 +108,21 @@ static void load_runtime_stat(struct runtime_stat *st, struct evlist *evlist,
 }
 
 static double compute_single(struct rblist *metric_events, struct evlist *evlist,
-			     struct runtime_stat *st)
+			     struct runtime_stat *st, const char *name)
 {
-	struct evsel *evsel = evlist__first(evlist);
+	struct metric_expr *mexp;
 	struct metric_event *me;
+	struct evsel *evsel;
 
-	me = metricgroup__lookup(metric_events, evsel, false);
-	if (me != NULL) {
-		struct metric_expr *mexp;
-
-		mexp = list_first_entry(&me->head, struct metric_expr, nd);
-		return test_generic_metric(mexp, 0, st);
+	evlist__for_each_entry(evlist, evsel) {
+		me = metricgroup__lookup(metric_events, evsel, false);
+		if (me != NULL) {
+			list_for_each_entry (mexp, &me->head, nd) {
+				if (strcmp(mexp->metric_name, name))
+					continue;
+				return test_generic_metric(mexp, 0, st);
+			}
+		}
 	}
 	return 0.;
 }
@@ -162,7 +166,7 @@ static int compute_metric(const char *name, struct value *vals, double *ratio)
 	load_runtime_stat(&st, evlist, vals);
 
 	/* And execute the metric */
-	*ratio = compute_single(&metric_events, evlist, &st);
+	*ratio = compute_single(&metric_events, evlist, &st, name);
 
 	/* ... clenup. */
 	metricgroup__rblist_exit(&metric_events);