[PATCH v6 7/7] perf test: Add a test for default perf stat command

James Clark
2024-09-03T10:22:16Z

Test that one cycles event is opened for each core PMU when "perf stat"
is run without arguments.

The event line can either be output as "pmu/cycles/" or just "cycles" if
there is only one PMU. Include 2 spaces for padding in the one PMU case
to avoid matching when the word cycles is included in metric
descriptions.

Signed-off-by: James Clark <james.clark@linaro.org>
---
tools/perf/tests/shell/stat.sh | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)

diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
index 525d0c44fdc6..5a2ca2bcf94d 100755
--- a/tools/perf/tests/shell/stat.sh
+++ b/tools/perf/tests/shell/stat.sh
@@ -148,6 +148,30 @@ test_cputype() {
echo "cputype test [Success]"
}

+test_hybrid() {
+ # Test the default stat command on hybrid devices opens one cycles event for
+ # each CPU type.
+ echo "hybrid test"
+
+ # Count the number of core PMUs, assume minimum of 1
+ pmus=$(ls /sys/bus/event_source/devices/*/cpus 2>/dev/null | wc -l)
+ if [ "$pmus" -lt 1 ]
+ then
+ pmus=1
+ fi
+
+ # Run default Perf stat
+ cycles_events=$(perf stat -- true 2>&1 | grep -E "/cycles/| cycles " | wc -l)
+
+ if [ "$pmus" -ne "$cycles_events" ]
+ then
+ echo "hybrid test [Found $pmus PMUs but $cycles_events cycles events. Failed]"
+ err=1
+ return
+ fi
+ echo "hybrid test [Success]"
+}
+
test_default_stat
test_stat_record_report
test_stat_record_script
@@ -155,4 +179,5 @@ test_stat_repeat_weak_groups
test_topdown_groups
test_topdown_weak_groups
test_cputype
+test_hybrid
exit $err
--
2.34.1