linux-kernel - Re: [PATCH RESEND 2/2] perf test: Update branch sample parttern for cs-etm

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Message-ID: <20201110180829.GF3429138@xps15>
Date:   Tue, 10 Nov 2020 11:08:29 -0700
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Leo Yan <leo.yan@...aro.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Suzuki Poulouse <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        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>,
        Jin Yao <yao.jin@...ux.intel.com>,
        linux-kernel@...r.kernel.org,
        Coresight ML <coresight@...ts.linaro.org>
Subject: Re: [PATCH RESEND 2/2] perf test: Update branch sample parttern for
 cs-etm

On Tue, Nov 10, 2020 at 02:34:17PM +0800, Leo Yan wrote:
> Since the commit 943b69ac1884 ("perf parse-events: Set exclude_guest=1
> for user-space counting"), 'exclude_guest=1' is set for user-space
> counting; and the branch sample's modifier has been altered, the sample
> event name has been changed from "branches:u:" to "branches:uH:", which
> gives out info for "user-space and host counting".
> 
> But the cs-etm testing's regular expression cannot match the updated
> branch sample event and leads to test failure.
> 
> This patch updates the branch sample parttern by using a more flexible

s/parttern/pattern

> expression '.*' to match branch sample's modifiers, so that allows the
> testing to work as expected.
> 
> Fixes: 943b69ac1884 ("perf parse-events: Set exclude_guest=1 for user-space counting")
> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
>  tools/perf/tests/shell/test_arm_coresight.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Here too I would CC stable.  With the above:

Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>

> 
> diff --git a/tools/perf/tests/shell/test_arm_coresight.sh b/tools/perf/tests/shell/test_arm_coresight.sh
> index 59d847d4981d..18fde2f179cd 100755
> --- a/tools/perf/tests/shell/test_arm_coresight.sh
> +++ b/tools/perf/tests/shell/test_arm_coresight.sh
> @@ -44,7 +44,7 @@ perf_script_branch_samples() {
>  	#   touch  6512          1         branches:u:      ffffb22082e0 strcmp+0xa0 (/lib/aarch64-linux-gnu/ld-2.27.so)
>  	#   touch  6512          1         branches:u:      ffffb2208320 strcmp+0xe0 (/lib/aarch64-linux-gnu/ld-2.27.so)
>  	perf script -F,-time -i ${perfdata} | \
> -		egrep " +$1 +[0-9]+ .* +branches:([u|k]:)? +"
> +		egrep " +$1 +[0-9]+ .* +branches:(.*:)? +"
>  }
>  
>  perf_report_branch_samples() {
> -- 
> 2.17.1
>