>>> Jeremy Fitzhardinge <jeremy@xxxxxxxx> 06.08.08 22:21 >>>
>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?
In Xen or the kernel? So far these are all Dom0-only measurements, so
in Xen there should be no contention.
To answer your other mail's question: It's defconfig builds I'm using.
Jan
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