linux-kernel - [PATCH v1] perf tests sched: Avoid error in cleanup on loaded machines

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Message-ID: <20260122175337.591403-1-irogers@google.com>
Date: Thu, 22 Jan 2026 09:53:37 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	James Clark <james.clark@...aro.org>, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: [PATCH v1] perf tests sched: Avoid error in cleanup on loaded machines

The stop_noploops function will kill the noploop processes that are
running for 10 seconds. On a loaded machine they may have already
terminated meaning the kill will return an error of no such
process. This doesn't matter and so ignore the error to avoid the test
terminating in the cleanup.

Fixes: 0e22c5ca44e6 ("perf test: Add sched latency and script shell tests")
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/tests/shell/sched.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/sched.sh b/tools/perf/tests/shell/sched.sh
index b9b81eaf856e..b9637069adb1 100755
--- a/tools/perf/tests/shell/sched.sh
+++ b/tools/perf/tests/shell/sched.sh
@@ -53,7 +53,7 @@ start_noploops() {
 }
 
 cleanup_noploops() {
-  kill "$PID1" "$PID2"
+  kill "$PID1" "$PID2" || true
 }
 
 test_sched_record() {
-- 
2.52.0.457.g6b5491de43-goog