linux-kernel - Re: [PATCH] sched: cpu accounting controller (V2)

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Message-ID: <47512E8D.6090805@linux.vnet.ibm.com>
Date:	Sat, 01 Dec 2007 15:21:09 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Paul Menage <menage@...gle.com>
CC:	vatsa@...ux.vnet.ibm.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	dhaval@...ux.vnet.ibm.com, containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, skumar@...ux.vnet.ibm.com,
	torvalds@...ux-foundation.org, mingo@...e.hu
Subject: Re: [PATCH] sched: cpu accounting controller (V2)

Paul Menage wrote:
> Hi Vatsa,
> 
> Thanks, this looks pretty good.
> 
> On Nov 30, 2007 4:42 AM, Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com> wrote:
>>         - Removed load average information. I felt it needs more thought (esp
>>           to deal with SMP and virtualized platforms) and can be added for
>>           2.6.25 after more discussions.
> 
> The "load" value was never a load average, it was just a count of the
> % cpu time used in the previous fixed window of time, updated at the
> end of each window.
> 
> Maybe we can instead do something based tracking the length of the run
> queue for the cgroup?
> 
> Paul

Length of the runqueue gives no idea of the weight of the tasks on the
runqueue. I still prefer to have a top'ish view of the load on the
system. The load average can be extracted using container group statistics.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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