[PATCH 5.15 101/244] perf tests: Fix Track with sched_switch test for hybrid case

Greg Kroah-Hartman
2022-08-23T10:04:32Z

From: Adrian Hunter <adrian.hunter@intel.com>

commit 1da1d60774014137d776d0400fdf2f1779d8d4d5 upstream.

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

Fixes: 43eb05d066795bdf ("perf tests: Support 'Track with sched_switch' test for hybrid")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20220809080702.6921-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/perf/tests/switch-tracking.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)

--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -324,6 +324,7 @@ out_free_nodes:
int test__switch_tracking(struct test *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 @@ int test__switch_tracking(struct test *t
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;
}