From c7bcaf433a7e4de4f6eee77264e719792e7c14bd Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Sun, 19 Jul 2020 20:13:17 +0200
Subject: [PATCH 124/201] perf metric: Make compute_single function more
 precise

mainline inclusion
from mainline-v5.9-rc1
commit b81ef466ace6bf9bfd7e63a4c2bc89721ee0d495
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8C0CX

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b81ef466ace6bf9bfd7e63a4c2bc89721ee0d495

----------------------------------------------------------------------

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 <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200719181320.785305-17-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: hongrongxuan <hongrongxuan@huawei.com>

  Conflicts:
	tools/perf/tests/parse-metric.c
---
 tools/perf/tests/parse-metric.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c
index fde9129eb3be..f8c58f7f8e55 100644
--- a/tools/perf/tests/parse-metric.c
+++ b/tools/perf/tests/parse-metric.c
@@ -106,17 +106,21 @@ static void load_runtime_stat(struct runtime_stat *st, struct perf_evlist *evlis
 }
 
 static double compute_single(struct rblist *metric_events, struct perf_evlist *evlist,
-			     struct runtime_stat *st)
+			     struct runtime_stat *st, const char *name)
 {
-	struct perf_evsel *evsel = perf_evlist__first(evlist);
+	struct metric_expr *mexp;
 	struct metric_event *me;
+	struct perf_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.;
 }
@@ -160,7 +164,7 @@ 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);
-- 
2.27.0