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

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Message-ID: <AANLkTikHqJR=JgZzKc1G-m8z82hBFmD-w1bLn5aENTcr@mail.gmail.com>
Date:	Mon, 21 Mar 2011 10:33:08 -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 Mon, Mar 21, 2011 at 3:42 AM, Jaswinder Singh
<jaswinderlinux@...il.com> wrote:
>
> Can you please suggest some simple tests to measure the performance
> enhancement by using cpusets/cgroups.

The cgroups framework is simply a way of grouping processes together
and allowing subsystems (memory, CPU, disk I/O, etc) to associate
state objects with each group. Generally this is for improving
isolation rather than improving performance - sticking extra machinery
and scheduling in will typically reduce overall throughput, but make
it more practical to share resources safely between multiple groups of
processes.

Your question is pretty open-ended - what's your ultimate goal? You
should probably be focusing on some particular problem that you're
trying to measure/improve via resource isolation/scheduling.

Paul
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