perf test: Extend branch stack sampling test for arm64 BRBE

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

Posted by James Clark 1 month, 3 weeks ago

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@linaro.org>
---
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@linaro.org>

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

Posted by Ian Rogers 1 month, 2 weeks ago

On Wed, Aug 13, 2025 at 6:39 AM James Clark <james.clark@linaro.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@linaro.org>

Reviewed-by: Ian Rogers <irogers@google.com>

Thanks,
Ian

> ---
> 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@linaro.org>
>

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

Posted by James Clark 3 days, 3 hours ago


On 18/08/2025 10:38 pm, Ian Rogers wrote:
> On Wed, Aug 13, 2025 at 6:39 AM James Clark <james.clark@linaro.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@linaro.org>
> 
> Reviewed-by: Ian Rogers <irogers@google.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@linaro.org>
>>

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

Posted by Arnaldo Carvalho de Melo 2 days, 22 hours ago

On Wed, Oct 01, 2025 at 02:49:08PM +0100, James Clark wrote:
> On 18/08/2025 10:38 pm, Ian Rogers wrote:
> > On Wed, Aug 13, 2025 at 6:39 AM James Clark <james.clark@linaro.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@linaro.org>

> > Reviewed-by: Ian Rogers <irogers@google.com>

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

Thanks, applied to perf-tools-next,

- Arnaldo