linux-kernel - [PATCH 2/2] perf tests: Fix Track with sched

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Date:   Tue, 12 Jul 2022 14:28:24 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] perf tests: Fix Track with sched_switch test for hybrid case

If cpu_core PMU event fails to parse, try also cpu_atom PMU event when
parsing cycles event.

Fixes: 43eb05d06679 ("perf tests: Support 'Track with sched_switch' test for hybrid")
Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/tests/switch-tracking.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index 0c0c2328bf4e..6f53bee33f7c 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -324,6 +324,7 @@ static int process_events(struct evlist *evlist,
 static int test__switch_tracking(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
 {
 	const char *sched_switch = "sched:sched_switch";
+	const char *cycles = "cycles:u";
 	struct switch_tracking switch_tracking = { .tids = NULL, };
 	struct record_opts opts = {
 		.mmap_pages	     = UINT_MAX,
@@ -372,12 +373,19 @@ static int test__switch_tracking(struct test_suite *test __maybe_unused, int sub
 	cpu_clocks_evsel = evlist__last(evlist);
 
 	/* Second event */
-	if (perf_pmu__has_hybrid())
-		err = parse_events(evlist, "cpu_core/cycles/u", NULL);
-	else
-		err = parse_events(evlist, "cycles:u", NULL);
+	if (perf_pmu__has_hybrid()) {
+		cycles = "cpu_core/cycles/u";
+		err = parse_events(evlist, cycles, NULL);
+		if (err) {
+			cycles = "cpu_atom/cycles/u";
+			pr_debug("Trying %s\n", cycles);
+			err = parse_events(evlist, cycles, NULL);
+		}
+	} else {
+		err = parse_events(evlist, cycles, NULL);
+	}
 	if (err) {
-		pr_debug("Failed to parse event cycles:u\n");
+		pr_debug("Failed to parse event %s\n", cycles);
 		goto out_err;
 	}
 
-- 
2.25.1