Re: [PATCH] perf test: Add ARM SPE system wide test

[German Gomez]

Thanks for the patch, Namhyung

On 15/06/2022 20:07, Namhyung Kim wrote:
> 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@xxxxxxx>
> Cc: Leo Yan <leo.yan@xxxxxxxxxx>
> Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
> ---
>  tools/perf/tests/shell/test_arm_spe.sh | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
>
> diff --git a/tools/perf/tests/shell/test_arm_spe.sh b/tools/perf/tests/shell/test_arm_spe.sh
> index e59044edc406..b9c588ae393b 100755
> --- a/tools/perf/tests/shell/test_arm_spe.sh
> +++ b/tools/perf/tests/shell/test_arm_spe.sh
> @@ -23,6 +23,7 @@ glb_err=0
>  cleanup_files()
>  {
>  	rm -f ${perfdata}
> +	rm -f ${perfdata}.old
>  	exit $glb_err
>  }
>  
> @@ -85,5 +86,19 @@ 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 ${perfdata} -e arm_spe// -a \
> +		-- dd if=/dev/zero of=/dev/null count=100000 > /dev/null 2>&1
> +

Should we skip if we don't have privileges for CPU tracing? (attached diff)

German

> +	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
diff --git a/tools/perf/tests/shell/test_arm_spe.sh b/tools/perf/tests/shell/test_arm_spe.sh
index b9c588ae3..962841a51 100755
--- a/tools/perf/tests/shell/test_arm_spe.sh
+++ b/tools/perf/tests/shell/test_arm_spe.sh
@@ -30,11 +30,13 @@ cleanup_files()
 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
 }
 
@@ -91,6 +93,11 @@ arm_spe_system_wide_test() {
 	perf record -o ${perfdata} -e arm_spe// -a \
 		-- dd if=/dev/zero of=/dev/null count=100000 > /dev/null 2>&1
 
+	if [ $? != 0 ]; then
+		arm_spe_report "SPE system-wide testing" 2
+		return
+	fi
+
 	perf_script_samples dd &&
 	perf_report_samples dd