linux-kernel - Re: [PATCH 3/9] Include nice values in cpuacct

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Message-ID: <4E776D31.9090008@parallels.com>
Date:	Mon, 19 Sep 2011 13:26:25 -0300
From:	Glauber Costa <glommer@...allels.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	<linux-kernel@...r.kernel.org>, <xemul@...allels.com>,
	<paul@...lmenage.org>, <lizf@...fujitsu.com>,
	<daniel.lezcano@...e.fr>, <jbottomley@...allels.com>
Subject: Re: [PATCH 3/9] Include nice values in cpuacct

On 09/19/2011 01:19 PM, Peter Zijlstra wrote:
> On Wed, 2011-09-14 at 17:04 -0300, Glauber Costa wrote:
>> Besides user and system.
>
>
> Why!?
Because this is the whole purpose of this series. Think that in a 
reasonable use case, each cgroup will be tied to a container system. 
Each of them wants to have its own statistics, in /proc/stat. The best 
way I thought of doing it was to piggyback into cpuacct, instead of 
coming up with a 124th accounting mechanism just for that.

I also used it do demonstrate how can we easily implement a new feature 
found in hypervisors out of it, but this is really just the cherry on top.
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