From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: Re: Xen spinlock questions
Date: Wed, 06 Aug 2008 13:21:53 -0700
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To: Jan Beulich <jbeulich@novell.com>
Cc: xen-devel@lists.xensource.com, Keir Fraser <keir.fraser@eu.citrix.com>
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Jan Beulich wrote:
>> In my tests, I only see it fall into the slow path a couple of thousand 
>> times per cpu for a kernbench run.
>>     
>
> Hmm, that's different then for me. Actually, I see a significant spike at
> modpost stage 2, when all the .ko-s get linked. The (spinlock) interrupt
> rate gets up to between 1,000 and 2,000 per CPU and second.
>   

BTW, how much contention for CPUs was there?

    J