linux-kernel - Re: hackbench regression with kernel 2.6.32-rc1

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Message-Id: <1255334731.7282.3.camel@marge.simson.net>
Date:	Mon, 12 Oct 2009 10:05:31 +0200
From:	Mike Galbraith <efault@....de>
To:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: hackbench regression with kernel 2.6.32-rc1

On Mon, 2009-10-12 at 15:05 +0800, Zhang, Yanmin wrote:

> The good news is only tbench has about 6% regression on Nehalem machines.
> Other regressions such like hackbench/aim7/volanoMark is not clear/big on
> Nehalem. But reverting the original 2 patches don't fix the tbench regression
> on Nehalem machines.

Could be NO_NEXT_BUDDY.  NEXT_BUDDY is pretty important for scaling.

	-Mike

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