RE: [PATCH 1/3] perf bench futex: benchmark only online CPUs

James Yang
2017-11-24T21:30:30Z

> -----Original Message-----
> From: Arnaldo Carvalho de Melo [mailto:acme@kernel.org]
> Sent: Friday, November 24, 2017 1:09 PM
> To: Davidlohr Bueso <dave@stgolabs.net>
> Cc: James Yang <James.Yang@arm.com>; Kim Phillips <Kim.Phillips@arm.com>;
> Peter Zijlstra <peterz@infradead.org>; Ingo Molnar <mingo@redhat.com>;
> Alexander Shishkin <alexander.shishkin@linux.intel.com>; Jiri Olsa
> <jolsa@redhat.com>; Namhyung Kim <namhyung@kernel.org>; Thomas Gleixner
> <tglx@linutronix.de>; Darren Hart <dvhart@infradead.org>; Colin Ian King
> <colin.king@canonical.com>; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH 1/3] perf bench futex: benchmark only online CPUs
>
> I try not to ask too much from people, i.e. their work already improves
> the current situation, for their use case, so could be applied, but
> yeah, it would be better, if James (or somebody else) is willing to try
> and use the perf cpumap infrastructure to reduce the bloat and actually
> validate even more it, James?
>
> - Arnaldo

Sorry for the delayed response. We are on holiday.

These patches were written over a year ago. I did not send it to lkml.

I did not continue development because I remember seeing an equivalent fix in another patch or a newer kernel than the one against which I wrote the patch.

I am busy with other things at this time, so if Kim (or someone else) wants to rewrite the patch to use cpumap, he should do it because I don't have the time to do it.
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