Re: [RFC PATCH v17 8/8] perf test: Add test for Intel TPEBS counting mode

Namhyung Kim
2024-07-18T05:43:00Z

Hello,

On Fri, Jul 12, 2024 at 03:09:30PM -0400, weilin.wang@intel.com wrote:
> From: Weilin Wang <weilin.wang@intel.com>
>
> Intel TPEBS sampling mode is supported through perf record. The counting mode
> code uses perf record to capture retire_latency value and use it in metric
> calculation. This test checks the counting mode code on Intel platforms.
>
> Signed-off-by: Weilin Wang <weilin.wang@intel.com>
> ---
> .../perf/tests/shell/test_stat_intel_tpebs.sh | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
> create mode 100755 tools/perf/tests/shell/test_stat_intel_tpebs.sh
>
> diff --git a/tools/perf/tests/shell/test_stat_intel_tpebs.sh b/tools/perf/tests/shell/test_stat_intel_tpebs.sh
> new file mode 100755
> index 000000000000..773fcc5c35d6
> --- /dev/null
> +++ b/tools/perf/tests/shell/test_stat_intel_tpebs.sh
> @@ -0,0 +1,19 @@
> +#!/bin/bash
> +# test Intel TPEBS counting mode
> +# SPDX-License-Identifier: GPL-2.0
> +
> +set -e
> +grep -q GenuineIntel /proc/cpuinfo || { echo Skipping non-Intel; exit 0; }

You should exit with 2 when skipping the test.

Thanks,
Namhyung

> +
> +# Use this event for testing because it should exist in all platforms
> +event=cache-misses:R
> +
> +# Without this cmd option, default value or zero is returned
> +echo "Testing without --record-tpebs"
> +result=$(perf stat -e "$event" true 2>&1)
> +[[ "$result" =~ $event ]] || exit 1
> +
> +# In platforms that do not support TPEBS, it should execute without error.
> +echo "Testing with --record-tpebs"
> +result=$(perf stat -e "$event" --record-tpebs -a sleep 0.01 2>&1)
> +[[ "$result" =~ "perf record" && "$result" =~ $event ]] || exit 1
> --
> 2.43.0
>