linux-kernel - Re: [PATCH 0/3] perf test: Extend branch stack sampling test for arm64 BRBE

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Message-ID: <6baf0f01-a333-4bca-b39d-d01f8624e170@linaro.org>
Date: Wed, 1 Oct 2025 14:49:08 +0100
From: James Clark <james.clark@...aro.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
 Anshuman Khandual <anshuman.khandual@....com>,
 "Rob Herring (Arm)" <robh@...nel.org>,
 Adam Young <admiyo@...amperecomputing.com>, Will Deacon <will@...nel.org>,
 German Gomez <german.gomez@....com>, linux-perf-users@...r.kernel.org,
 linux-kernel@...r.kernel.org, Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCH 0/3] perf test: Extend branch stack sampling test for
 arm64 BRBE



On 18/08/2025 10:38 pm, Ian Rogers wrote:
> On Wed, Aug 13, 2025 at 6:39 AM James Clark <james.clark@...aro.org> wrote:
>>
>> Refactor and add some extra tests for all platforms which were useful
>> when developing and testing the BRBE (Branch Buffer Extension) driver
>> [1]. Then lastly extend the test for new features which are BRBE
>> specific.
>>
>> Tested on the Arm FVP RevC model [2] and Intel Raptor Lake.
>>
>> [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=58074a0fce66
>> [2]: https://developer.arm.com/Tools%20and%20Software/Fixed%20Virtual%20Platforms
>>
>> Signed-off-by: James Clark <james.clark@...aro.org>
> 
> Reviewed-by: Ian Rogers <irogers@...gle.com>
> 
> Thanks,
> Ian
> 

Hi Arnaldo,

If you have a chance can you take this one please. It still applies 
cleanly to perf-tools-next.

Thanks
James

>> ---
>> James Clark (3):
>>        perf test: Refactor brstack test
>>        perf test: Add syscall and address tests to brstack test
>>        perf test: Extend branch stack sampling test for Arm64 BRBE
>>
>>   tools/perf/tests/builtin-test.c        |   1 +
>>   tools/perf/tests/shell/test_brstack.sh | 106 ++++++++++++++++++++++++++++++---
>>   tools/perf/tests/tests.h               |   1 +
>>   tools/perf/tests/workloads/Build       |   2 +
>>   tools/perf/tests/workloads/traploop.c  |  31 ++++++++++
>>   5 files changed, 132 insertions(+), 9 deletions(-)
>> ---
>> base-commit: 6235ce77749f45cac27f630337e2fdf04e8a6c73
>> change-id: 20250811-james-brbe-test-f5a20dffd734
>>
>> Best regards,
>> --
>> James Clark <james.clark@...aro.org>
>>