[PATCH v5 7/7] perf test: Add a test for default perf stat command
From: James Clark <james.clark@linaro.org>
Date: 2024-08-28 14:09:52
Also in:
linux-perf-users, lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
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 | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
index 525d0c44fdc6..24ace1de71cc 100755
--- a/tools/perf/tests/shell/stat.sh
+++ b/tools/perf/tests/shell/stat.sh@@ -148,6 +148,26 @@ 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 + pmus=$(ls /sys/bus/event_source/devices/*/cpus 2>/dev/null | wc -l) + + # Run default Perf stat + cycles_events=$(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 +175,5 @@ test_stat_repeat_weak_groups test_topdown_groups test_topdown_weak_groups test_cputype +test_hybrid exit $err
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2.34.1