linux-kernel - Re: Tests for cpusets and cgroup performance measurement

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Message-ID: <AANLkTimRqvy4JseWka9HfwvmirbUxcTEBy5OTg4UiQiZ@mail.gmail.com>
Date:	Thu, 24 Mar 2011 14:16:27 -0700
From:	Paul Menage <menage@...gle.com>
To:	Jaswinder Singh <jaswinderlinux@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Li Zefan <lizf@...fujitsu.com>,
	containers@...ts.linux-foundation.org
Subject: Re: Tests for cpusets and cgroup performance measurement

On Tue, Mar 22, 2011 at 10:42 PM, Jaswinder Singh
<jaswinderlinux@...il.com> wrote:
> "Jobs on larger NUMA systems may see a performance boost if jobs can be
> intelligently assigned to specific CPUs. Jobs may perform better if
> striped across physical processors, or contained within the fewest
> number of memory controllers."
>
> I am curious and want to try some simple tests so that I can see the
> performance improvement by using cpusets on my PCs.
>
> Can you suggest some tests so that I can study them.

Not particularly - I've never been involved in optimizing apps on
large NUMA systems. Our uses of NUMA at Google have all involved
faked-NUMA nodes, assigning nodes to jobs to provide crude memory
limits.

I suspect that there aren't very many "simple" tests out there. Google
search for [hpc numa tuning] turns up a few likely pages that might
have pointers to suitable applications.

Paul
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