Date: Mon, 30 Nov 2009 12:58:12 +0200
From: Gleb Natapov <gleb@redhat.com>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>, kvm@vger.kernel.org,
       linux-mm@kvack.org, linux-kernel@vger.kernel.org, avi@redhat.com,
       mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com, riel@redhat.com
Subject: Re: [PATCH v2 10/12] Maintain preemptability count even for
 !CONFIG_PREEMPT kernels
Message-ID: <20091130105812.GG30150@redhat.com>
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 <20091123155851.GU2999@redhat.com>
 <alpine.DEB.2.00.0911231128190.785@router.home>
 <20091124071250.GC2999@redhat.com>
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On Mon, Nov 30, 2009 at 12:56:12PM +0200, Gleb Natapov wrote:
> On Tue, Nov 24, 2009 at 09:14:03AM -0600, Christoph Lameter wrote:
> > On Tue, 24 Nov 2009, Gleb Natapov wrote:
> > 
> > > On Mon, Nov 23, 2009 at 11:30:02AM -0600, Christoph Lameter wrote:
> > > > This adds significant overhead for the !PREEMPT case adding lots of code
> > > > in critical paths all over the place.
> > > I want to measure it. Can you suggest benchmarks to try?
> > 
> > AIM9 (reaim9)?
> Below are results for kernel 2.6.32-rc8 with and without the patch (only
> this single patch is applied).
> 
Forgot to tell. The results are average between 5 different runs.

--
			Gleb.
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