linux-kernel - [PATCH v2 4/4] perf tests: Fix 'Convert perf time to TSC' on core-only system

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Date:   Thu,  8 Jul 2021 09:37:01 +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 4/4] perf tests: Fix 'Convert perf time to TSC' on core-only system

If the atom CPUs are offlined, the 'cpu_atom' is not valid.
We don't need the test case for 'cpu_atom'.

Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
 tools/perf/tests/perf-time-to-tsc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/perf-time-to-tsc.c b/tools/perf/tests/perf-time-to-tsc.c
index 85d75b9b25a1..7c56bc1f4cff 100644
--- a/tools/perf/tests/perf-time-to-tsc.c
+++ b/tools/perf/tests/perf-time-to-tsc.c
@@ -21,6 +21,7 @@
 #include "mmap.h"
 #include "tests.h"
 #include "pmu.h"
+#include "pmu-hybrid.h"
 
 #define CHECK__(x) {				\
 	while ((x) < 0) {			\
@@ -93,7 +94,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
 	 * For hybrid "cycles:u", it creates two events.
 	 * Init the second evsel here.
 	 */
-	if (perf_pmu__has_hybrid()) {
+	if (perf_pmu__has_hybrid() && perf_pmu__hybrid_mounted("cpu_atom")) {
 		evsel = evsel__next(evsel);
 		evsel->core.attr.comm = 1;
 		evsel->core.attr.disabled = 1;
-- 
2.17.1