linux-kernel - [PATCH v2 2/2] perf test: Add test case for group members

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Message-Id: <20200525065559.6422-2-yao.jin@linux.intel.com>
Date:   Mon, 25 May 2020 14:55:59 +0800
From:   Jin Yao <yao.jin@...ux.intel.com>
To:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com
Cc:     Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com,
        Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH v2 2/2] perf test: Add test case for group members

The evlist may consist of some event + group combinations.

For example, perf stat -e "A,{B,C},D".

This patch testes the event in evlist to see if it has the
correct leader and correct nr_members.

Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
 tools/perf/tests/parse-events.c | 35 ++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index 895188b63f96..d584b77c878d 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -1386,6 +1386,34 @@ static int test__sym_event_dc(struct evlist *evlist)
 	return 0;
 }
 
+static int test__mixed_group(struct evlist *evlist)
+{
+	struct evsel *evsel, *leader;
+
+	TEST_ASSERT_VAL("wrong number of entries", 4 == evlist->core.nr_entries);
+
+	/* cycles - leader is also itself */
+	evsel = leader = evlist__first(evlist);
+	TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+	TEST_ASSERT_VAL("wrong nr_members", 0 == evsel->core.nr_members);
+
+	/* {cache-misses,branch-misses} - leader is cache-misses */
+	evsel = leader = evsel__next(evsel);
+	TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+	TEST_ASSERT_VAL("wrong nr_members", 2 == evsel->core.nr_members);
+
+	evsel = evsel__next(evsel);
+	TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+	TEST_ASSERT_VAL("wrong nr_members", 0 == evsel->core.nr_members);
+
+	/* instructions - leader is also itself */
+	evsel = leader = evlist__first(evlist);
+	TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+	TEST_ASSERT_VAL("wrong nr_members", 0 == evsel->core.nr_members);
+
+	return 0;
+}
+
 static int count_tracepoints(void)
 {
 	struct dirent *events_ent;
@@ -1737,7 +1765,12 @@ static struct evlist_test test__events[] = {
 		.name  = "cycles:k",
 		.check = test__sym_event_dc,
 		.id    = 55,
-	}
+	},
+	{
+		.name  = "cycles,{cache-misses,branch-misses},instructions",
+		.check = test__mixed_group,
+		.id    = 56,
+	},
 };
 
 static struct evlist_test test__events_pmu[] = {
-- 
2.17.1