linux-kernel - Re: [PATCH] perf tests: Fix coresight `perf test` failure.

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Date:   Thu, 28 Apr 2022 17:14:09 +0100
From:   James Clark <james.clark@....com>
To:     Jeremy Linton <jeremy.linton@....com>,
        linux-perf-users@...r.kernel.org,
        "acme@...nel.org" <acme@...nel.org>
Cc:     peterz@...radead.org, mingo@...hat.com, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, irogers@...gle.com, leo.yan@...aro.org,
        linux-kernel@...r.kernel.org, Leo Yan <leo.yan@...aro.org>
Subject: Re: [PATCH] perf tests: Fix coresight `perf test` failure.



On 28/04/2022 16:19, Jeremy Linton wrote:
> Currently the `perf test` always fails the coresight test like:
> 
> 89: Check Arm CoreSight trace data recording and synthesized samples: FAILED!
> 
> That is because the test_arm_coresight.sh is attempting to SIGINT the
> parent but is using $$ rather than $PPID and it sigint's itself when
> run under the perf test framework. Since this is done in a trap clause
> it ends up returning a non zero return. Since $PPID is a bash ism and
> not all distros are linking /bin/sh to bash, the alternative
> parent pid lookups are uglier than just dropping the kill, and its
> not strictly needed, lets pick the simple solution and drop the sigint.
> 
> Fixes: 133fe2e617e4 ("perf tests: Improve temp file cleanup in test_arm_coresight.sh")
> Cc: James Clark <james.clark@....com>
> Signed-off-by: Jeremy Linton <jeremy.linton@....com>
> ---
>  tools/perf/tests/shell/test_arm_coresight.sh | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/tools/perf/tests/shell/test_arm_coresight.sh b/tools/perf/tests/shell/test_arm_coresight.sh
> index 6de53b7ef5ff..e4cb4f1806ff 100755
> --- a/tools/perf/tests/shell/test_arm_coresight.sh
> +++ b/tools/perf/tests/shell/test_arm_coresight.sh
> @@ -29,7 +29,6 @@ cleanup_files()
>  	rm -f ${file}
>  	rm -f "${perfdata}.old"
>  	trap - exit term int
> -	kill -2 $$
>  	exit $glb_err
>  }
>  

Reviewed-by: James Clark <james.clark@....com>