linux-kernel - Re: [PATCH v13 03/16] perf record: Introduce thread specific data array

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Message-ID: <YgaUA4O2wvFFeeQJ@kernel.org>
Date:   Fri, 11 Feb 2022 13:51:15 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Alexander Antonov <alexander.antonov@...ux.intel.com>,
        Alexei Budankov <abudankov@...wei.com>,
        Riccardo Mancini <rickyman7@...il.com>
Subject: Re: [PATCH v13 03/16] perf record: Introduce thread specific data
 array

Em Mon, Jan 31, 2022 at 07:21:11PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Mon, Jan 31, 2022 at 06:39:39PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Some changes to reduce patch size, I have them in my local tree, will
> > publish later.
> 
> Its in perf/threaded at:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git
> 
> Will continue tomorrow, testing it and checking the speedups on my
> 5950x, I think the things I found so far can be fixed in follow up
> patches, to make progress and have this merged sooner.
> 
> I'll try and add committer notes with the test for some 'perf bench'
> workload without/with parallel recording, something I missed in your
> patch descriptions.

Didn't manage to do that, but my considerations are minor at this point
and plenty of informed people acked, reviewed, tested, so I'm not going
to be the one to prevent this from going upstream.

If we find problems (oh well), we'll fix it and progress.

Thank you, Alexei Budankov, Jiri, Namhyung and Riccardo for working on
making perf scale at the record phase for so long,

I'm pushing this to perf/core, that should get into 5.18.

Also, as a heads up, I'll change 'perf/core' to 'perf/next', to align
with the kool kids out there,

Thanks,

- Arnaldo