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Message-Id: <1206512326.21146.0.camel@marge.simson.net>
Date:	Wed, 26 Mar 2008 07:18:46 +0100
From:	Mike Galbraith <efault@....de>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Manfred Spraul <manfred@...orfullife.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	paulmck@...ux.vnet.ibm.com, Nadia Derbey <Nadia.Derbey@...l.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: Scalability requirements for sysv ipc


On Tue, 2008-03-25 at 17:13 +0100, Peter Zijlstra wrote:

> > ...and I verified it via :-/ echo 7 > sched_features in latest.  That
> > only bought me roughly half though, so there's a part three in there
> > somewhere.
> 
> Ouch, I guess hrtimers are just way expensive on some hardware... 

It takes a large bite out of my P4 as well.

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