linux-kernel - Re: [PATCH] sched: revert load_balance

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Message-Id: <1204269065.6143.20.camel@homer.simson.net>
Date:	Fri, 29 Feb 2008 08:11:05 +0100
From:	Mike Galbraith <efault@....de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sched: revert load_balance_monitor()


On Thu, 2008-02-28 at 17:13 +0100, Mike Galbraith wrote:
> On Thu, 2008-02-28 at 14:26 +0100, Ingo Molnar wrote: 
> 
> > Mike, could you check whether today's sched-devel.git (which includes 
> > the full revert) works well for you? (with group scheduler enabled)
> 
> No, it's fairly lurchy with three root chew-max and one user chew-max
> running.  Moving the mouse around while they're running, I can see/feel
> the load, and max latency for the user chew-max quickly shoots to
> >500ms.

fair-group: single RQ approach was responsible for the lurchiness.  In
testing with that commit reverted, I've hit a couple anomalies.  Details
and mondo data sent offline.

	-Mike

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