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

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Date:   Wed, 11 Nov 2020 11:04:56 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Mathieu Poirier <mathieu.poirier@...aro.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 03:19:29PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Nov 10, 2020 at 11:08:29AM -0700, Mathieu Poirier escreveu:
> > 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
> 
> I'll fix it and add stable@ to the CC list, thanks

Thanks, Arnaldo and Mathieu.

Will take care for sending stable list in next time.

> > > 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
> > > 
> 
> -- 
> 
> - Arnaldo