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Message-ID: <CA+G9fYsNCqKOAt1EdzvgDibpGnWVZum2RPJZe5CU8Ao-eYGyYA@mail.gmail.com>
Date: Thu, 23 Jul 2020 20:39:12 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: open list <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Guenter Roeck <linux@...ck-us.net>,
Shuah Khan <shuah@...nel.org>, patches@...nelci.org,
Ben Hutchings <ben.hutchings@...ethink.co.uk>,
lkft-triage@...ts.linaro.org,
linux- stable <stable@...r.kernel.org>,
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>,
jolsa@...hat.com, Namhyung Kim <namhyung@...nel.org>,
Leo Yan <leo.yan@...aro.org>,
Basil Eljuse <Basil.Eljuse@....com>
Subject: Re: [PATCH 5.7 000/243] 5.7.10-rc2 review
On Wed, 22 Jul 2020 at 18:19, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> >
> > Results from Linaro’s test farm.
> > Regressions detected on arm and arm64 (Juno-r2)
> > We are bisecting this problem and get back to you soon.
> >
> > perf test cases failed
> > perf:
> > * Track-with-sched_switch
> > * perf_record_test
> > * perf_report_test
> >
> > Bad case:
> > [ perf record: Woken up 1 times to write data ]
> > [ perf record: Captured and wrote 0.002 MB perf-lava-test.data ]
> >
> > when it was pass it prints number of samples like below,
> > Good case:
> > [ perf record: Woken up 1 times to write data ]
> > [ perf record: Captured and wrote 0.004 MB perf-lava-test.data (46 samples) ]
> >
> > steps to reproduce:
> > # perf record -e cycles -o perf-lava-test.data ls -a 2>&1 | tee perf-record.log
> >
> > Link to full test:
> > https://qa-reports.linaro.org/lkft/linux-stable-rc-5.7-oe/build/v5.7.9-244-g7d2e5723ce4a/testrun/2969482/suite/perf/test/perf_record_test/log
> >
> > test case:
> > https://github.com/Linaro/test-definitions/blob/master/automated/linux/perf/perf.sh
>
> Any hint by bisection as to what this problem is caused by?
Not yet found the bad commit.
We are working on it.
- Naresh
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