linux-kernel - Re: [PATCH v2 2/3] perf test: Add verbose skip output for bpf counters

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Date:   Tue, 22 Jun 2021 15:05:21 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Song Liu <songliubraving@...com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        bpf@...r.kernel.org
Subject: Re: [PATCH v2 2/3] perf test: Add verbose skip output for bpf
 counters

Em Mon, Jun 21, 2021 at 02:56:47PM -0700, Ian Rogers escreveu:
> Provide additional context for when the stat bpf counters test skips.

Ditto
 
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
>  tools/perf/tests/shell/stat_bpf_counters.sh | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/tests/shell/stat_bpf_counters.sh b/tools/perf/tests/shell/stat_bpf_counters.sh
> index 22eb31e48ca7..85eb689fe202 100755
> --- a/tools/perf/tests/shell/stat_bpf_counters.sh
> +++ b/tools/perf/tests/shell/stat_bpf_counters.sh
> @@ -22,7 +22,13 @@ compare_number()
>  }
>  
>  # skip if --bpf-counters is not supported
> -perf stat --bpf-counters true > /dev/null 2>&1 || exit 2
> +if ! perf stat --bpf-counters true > /dev/null 2>&1; then
> +	if [ "$1" == "-v" ]; then
> +		echo "Skipping: --bpf-counters not supported"
> +		perf --no-pager stat --bpf-counters true || true
> +	fi
> +	exit 2
> +fi
>  
>  base_cycles=$(perf stat --no-big-num -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}')
>  bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}')
> -- 
> 2.32.0.288.g62a8d224e6-goog
> 

-- 

- Arnaldo