Re: [PATCH v2 0/3] perf arm-spe: Add snapshot mode support

[Arnaldo Carvalho de Melo <acme@kernel.org>]

Em Thu, Nov 11, 2021 at 04:46:21PM +0800, Leo Yan escreveu:
> Hi Arnaldo,
> 
> On Tue, Nov 09, 2021 at 04:30:06PM +0000, German Gomez wrote:
> > This patchset adds snapshot mode support for arm-spe.
> > 
> >   - [PATCH 1/3] implements the minimal callbacks to support recording in
> >     snapshot mode.
> >   - [PATCH 2/3] implements the find_snapshot callback in order to handle
> >     wrap-arounds in the AUX buffer.
> >   - [PATCH 3/3] adds a test for spe snapshot mode.
> 
> I have verified this patch set on Hisilicon D06 board, please consider
> to pick up:
> 
> root@ubuntu:/home/leoy/linux/tools/perf# ./perf test -v 85
> 85: Check Arm SPE trace data recording and synthesized samples      :
> --- start ---
> test child forked, pid 17083
> Recording trace with snapshot mode /tmp/__perf_test.perf.data.MI2iX
> Looking at perf.data file for dumping samples:
> Looking at perf.data file for reporting samples:
> SPE snapshot testing: PASS
> test child finished with 0
> ---- end ----
> Check Arm SPE trace data recording and synthesized samples: Ok
> 
> BTW, you could see German has another patch set for enabling pid/tid
> for Arm SPE tracing [1].  I confirmed that the pid/tid patch set and
> current patch set have no conflit, and don't need worry the dependency
> between these two patch sets (so you could apply two patch sets in any
> ordering).

Thanks for the clarifications, applied, its out in my tmp.perf/core
branch, that still needs some fixes for buiding on arm related to a
recent patchset for 'perf test' from Ian Rogers, as soon as that is
fixed it will be set in stone in perf/core.

- Arnaldo