linux-kernel - Re: [PATCH v1] perf test: Be more tolerant of metricgroup failures

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Date: Thu, 4 Apr 2024 11:08:31 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Adrian Hunter <adrian.hunter@...el.com>, Athira Rajeev <atrajeev@...ux.vnet.ibm.com>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] perf test: Be more tolerant of metricgroup failures

Hi Ian,

On Wed, Apr 3, 2024 at 9:48 AM Ian Rogers <irogers@...gle.com> wrote:
>
> Previously "set -e" meant any non-zero exit code from perf stat would
> cause a test failure. As a non-zero exit happens when there aren't
> sufficient permissions, check for this case and make the exit code
> 2/skip for it.
>
> Signed-off-by: Ian Rogers <irogers@...gle.com>

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung


> ---
>  .../perf/tests/shell/stat_all_metricgroups.sh | 28 +++++++++++++++----
>  1 file changed, 22 insertions(+), 6 deletions(-)
>
> diff --git a/tools/perf/tests/shell/stat_all_metricgroups.sh b/tools/perf/tests/shell/stat_all_metricgroups.sh
> index 55ef9c9ded2d..d6db192b9f18 100755
> --- a/tools/perf/tests/shell/stat_all_metricgroups.sh
> +++ b/tools/perf/tests/shell/stat_all_metricgroups.sh
> @@ -1,9 +1,7 @@
> -#!/bin/sh
> +#!/bin/bash
>  # perf all metricgroups test
>  # SPDX-License-Identifier: GPL-2.0
>
> -set -e
> -
>  ParanoidAndNotRoot()
>  {
>    [ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ]
> @@ -14,11 +12,29 @@ if ParanoidAndNotRoot 0
>  then
>    system_wide_flag=""
>  fi
> -
> +err=0
>  for m in $(perf list --raw-dump metricgroups)
>  do
>    echo "Testing $m"
> -  perf stat -M "$m" $system_wide_flag sleep 0.01
> +  result=$(perf stat -M "$m" $system_wide_flag sleep 0.01 2>&1)
> +  result_err=$?
> +  if [[ $result_err -gt 0 ]]
> +  then
> +    if [[ "$result" =~ \
> +          "Access to performance monitoring and observability operations is limited" ]]
> +    then
> +      echo "Permission failure"
> +      echo $result
> +      if [[ $err -eq 0 ]]
> +      then
> +        err=2 # Skip
> +      fi
> +    else
> +      echo "Metric group $m failed"
> +      echo $result
> +      err=1 # Fail
> +    fi
> +  fi
>  done
>
> -exit 0
> +exit $err
> --
> 2.44.0.478.gd926399ef9-goog
>