linux-kernel - [PATCH v3] perf test: Add ARM SPE system wide test

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Date:   Fri,  1 Jul 2022 16:09:32 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        linux-perf-users@...r.kernel.org,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        German Gomez <german.gomez@....com>,
        Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v3] perf test: Add ARM SPE system wide test

In the past it had a problem not setting the pid/tid on the sample
correctly when system-wide mode is used.  Although it's fixed now it'd
be nice if we have a test case for it.

Cc: German Gomez <german.gomez@....com>
Cc: Leo Yan <leo.yan@...aro.org>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
* skip if system-wide record was failed
* use dummy event for testing

 tools/perf/tests/shell/test_arm_spe.sh | 30 +++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/tools/perf/tests/shell/test_arm_spe.sh b/tools/perf/tests/shell/test_arm_spe.sh
index e59044edc406..0d47479adba8 100755
--- a/tools/perf/tests/shell/test_arm_spe.sh
+++ b/tools/perf/tests/shell/test_arm_spe.sh
@@ -23,17 +23,20 @@ glb_err=0
 cleanup_files()
 {
 	rm -f ${perfdata}
+	rm -f ${perfdata}.old
 	exit $glb_err
 }
 
 trap cleanup_files exit term int
 
 arm_spe_report() {
-	if [ $2 != 0 ]; then
+	if [ $2 = 0 ]; then
+		echo "$1: PASS"
+	elif [ $2 = 2 ]; then
+		echo "$1: SKIPPED"
+	else
 		echo "$1: FAIL"
 		glb_err=$2
-	else
-		echo "$1: PASS"
 	fi
 }
 
@@ -85,5 +88,26 @@ arm_spe_snapshot_test() {
 	arm_spe_report "SPE snapshot testing" $err
 }
 
+arm_spe_system_wide_test() {
+	echo "Recording trace with system-wide mode $perfdata"
+
+	perf record -o - -e dummy -a -B true > /dev/null 2>&1
+	if [ $? != 0 ]; then
+		arm_spe_report "SPE system-wide testing" 2
+		return
+	fi
+
+	perf record -o ${perfdata} -e arm_spe// -a --no-bpf-event \
+		-- dd if=/dev/zero of=/dev/null count=100000 > /dev/null 2>&1
+
+	perf_script_samples dd &&
+	perf_report_samples dd
+
+	err=$?
+	arm_spe_report "SPE system-wide testing" $err
+}
+
 arm_spe_snapshot_test
+arm_spe_system_wide_test
+
 exit $glb_err
-- 
2.37.0.rc0.161.g10f37bed90-goog