linux-kernel - Re: sched: context tracking demolishes pipe-test

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Date:	Mon, 01 Jul 2013 11:20:32 +0200
From:	Mike Galbraith <bitbucket@...ine.de>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: sched: context tracking demolishes pipe-test

On Mon, 2013-07-01 at 11:12 +0200, Mike Galbraith wrote: 
> On Mon, 2013-07-01 at 10:06 +0200, Peter Zijlstra wrote:
> 
> > So aside from the context tracking stuff, there's still a regression
> > we might want to look at. That's still a ~10% drop against 2.6.32 for
> > TCP_RR and few percents for tbench.
> 
> Yeah, known, and some of it's ours.

(btw tbench has a ~5% phase-of-moon jitter, you can pretty much
disregard that one)

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