linux-kernel - Re: [PATCH v4] sched: automated per session task groups

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Message-Id: <1291184173.7466.147.camel@marge.simson.net>
Date:	Wed, 01 Dec 2010 07:16:13 +0100
From:	Mike Galbraith <efault@....de>
To:	Paul Turner <pjt@...gle.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] sched: automated per session task groups

On Tue, 2010-11-30 at 19:39 -0800, Paul Turner wrote:
> On 11/28/10 06:24, Mike Galbraith wrote:
> >
> > Something else is seriously wrong though.  36.1 with attached (plus
> > sched, cgroup: Fixup broken cgroup movement) works a treat, whereas
> > 37.git and tip with fixlet below both suck rocks.  With a make -j40
> > running, wakeup-latency is showing latencies of>100ms, amarok skips,
> > mouse lurches badly.. generally horrid.  Something went south.
> 
> I'm looking at this.
> 
> The share:share ratios looked good in static testing, but perhaps we 
> need a little more wake-up boost to improve interactivity.

Yeah, feels like a wakeup issue.  I too did a (brief) static test, and
that looked ok.

	-Mike

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