[PATCH v2] perf test: Fix perf test case 84 on s390
From: Thomas Richter
Date: Fri Oct 18 2024 - 04:17:49 EST
Perf test case 84 'perf pipe recording and injection test'
sometime fails on s390, especially on z/VM virtual machines.
This is caused by a very short run time of workload
# perf test -w noploop
which runs for 1 second. Occasionally this is not long
enough and the perf report has no samples for symbol noploop.
Fix this and enlarge the runtime for the perf work load
to 3 seconds. This ensures the symbol noploop is always
present. Since only s390 is affected, make this loop
architecture dependend.
Output before:
Inject -b build-ids test
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.195 MB - ]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.277 MB - ]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.195 MB - ]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.160 MB
/tmp/perf.data.ELzRdq (4031 samples) ]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.195 MB - ]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.195 MB - ]
Inject -b build-ids test [Success]
Inject --buildid-all build-ids test
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.195 MB - ]
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.014 MB - ]
Inject --buildid-all build-ids test [Failed - cannot find
noploop function in pipe #2]
Output after:
Successful execution for over 10 times in a loop.
Signed-off-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Reviewed-by: Sumanth Korikkar <sumanthk@xxxxxxxxxxxxx>
Suggested-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
tools/perf/tests/shell/pipe_test.sh | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/perf/tests/shell/pipe_test.sh b/tools/perf/tests/shell/pipe_test.sh
index d4c8005ce9b9..e459aa99a951 100755
--- a/tools/perf/tests/shell/pipe_test.sh
+++ b/tools/perf/tests/shell/pipe_test.sh
@@ -13,6 +13,7 @@ skip_test_missing_symbol ${sym}
data=$(mktemp /tmp/perf.data.XXXXXX)
data2=$(mktemp /tmp/perf.data2.XXXXXX)
prog="perf test -w noploop"
+[ "$(uname -m)" = "s390x" ] && prog="$prog 3"
err=0
set -e
--
2.47.0