linux-kernel - Re: AIM7 40% regression with 2.6.26-rc1

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Message-ID: <alpine.LFD.1.10.0805072115190.3024@woody.linux-foundation.org>
Date:	Wed, 7 May 2008 21:17:14 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
cc:	Andi Kleen <andi@...stfloor.org>, Matthew Wilcox <matthew@....cx>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Alexander Viro <viro@....linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: AIM7 40% regression with 2.6.26-rc1



On Thu, 8 May 2008, Zhang, Yanmin wrote:
> 
> On Wed, 2008-05-07 at 20:29 -0700, Linus Torvalds wrote:
> > 
> > That said, "idle 0%" is easy when you spin. Do you also have actual 
> > performance numbers?
>
> Yes. My conclusion is based on the actual number. cpu idle 0% is just
> a behavior it should be.

Thanks, that's all I wanted to verify.

I'll leave this overnight, and see if somebody has come up with some smart 
and wonderful patch. And if not, I think I'll apply mine as "known to fix 
a regression", and we can perhaps then improve on things further from 
there.

		Linus
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