This is a note to let you know that I've just added the patch titled
perf test stat: Avoid hybrid assumption when virtualized
to the 6.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-test-stat-avoid-hybrid-assumption-when-virtuali.patch
and it can be found in the queue-6.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2ef3fddfbff1d4ed42845dd62378c8cc75893b67
Author: Ian Rogers <irogers@xxxxxxxxxx>
Date: Thu Dec 12 09:33:54 2024 -0800
perf test stat: Avoid hybrid assumption when virtualized
[ Upstream commit f9c506fb69bdcfb9d7138281378129ff037f2aa1 ]
The cycles event will fallback to task-clock in the hybrid test when
running virtualized. Change the test to not fail for this.
Fixes: 65d11821910bd910 ("perf test: Add a test for default perf stat command")
Reviewed-by: James Clark <james.clark@xxxxxxxxxx>
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241212173354.9860-1-irogers@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
index 7a8adf81e4b39..68323d636fb77 100755
--- a/tools/perf/tests/shell/stat.sh
+++ b/tools/perf/tests/shell/stat.sh
@@ -187,7 +187,11 @@ test_hybrid() {
# Run default Perf stat
cycles_events=$(perf stat -- true 2>&1 | grep -E "/cycles/[uH]*| cycles[:uH]* " -c)
- if [ "$pmus" -ne "$cycles_events" ]
+ # The expectation is that default output will have a cycles events on each
+ # hybrid PMU. In situations with no cycles PMU events, like virtualized, this
+ # can fall back to task-clock and so the end count may be 0. Fail if neither
+ # condition holds.
+ if [ "$pmus" -ne "$cycles_events" ] && [ "0" -ne "$cycles_events" ]
then
echo "hybrid test [Found $pmus PMUs but $cycles_events cycles events. Failed]"
err=1
