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

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Message-ID: <YgaUWoQ+LRrDaAAP@kernel.org>
Date:   Fri, 11 Feb 2022 13:52:42 -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 Fri, Feb 11, 2022 at 01:51:16PM -0300, Arnaldo Carvalho de Melo escreveu:
> 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,

Something I forgot to add: the current codebase, with this patchset,
passes 'perf test' and 'make -C tools/perf build-test' and also all the
container build tests on a myriad of distros.

- Arnaldo