linux-kernel - Re: volano ~30% regression with 2.6.33-rc1 & -rc2

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Message-ID: <20100104044024.5390ff1c@infradead.org>
Date:	Mon, 4 Jan 2010 04:40:24 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Mike Galbraith <efault@....de>,
	Peter Zijlstra <peterz@...radead.org>,
	lkml <linux-kernel@...r.kernel.org>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Subject: Re: volano ~30% regression with 2.6.33-rc1 & -rc2

On Mon, 04 Jan 2010 16:15:58 +0800
Lin Ming <ming.m.lin@...el.com> wrote:

> Mike & Peter,
> 
> Compared with 2.6.32, volano has ~30% regression with 2.6.33-rc1 &
> -rc2. Testing machine: Tigerton Xeon, 16cpus(4P/4Core), 16G memory

did this show up only on this cpu?
(since this is a multi-core-without-shared-cache cpu, it could be that
we get the topology wrong and think cores share cache where they don't)


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
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