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List:       linux-mm
Subject:    Re: Fastpath prototype?
From:       Andi Kleen <ak () suse ! de>
Date:       2008-02-13 11:38:19
Message-ID: 47B2D6AB.1020408 () suse ! de
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Christoph Lameter wrote:
> Here is a patch to remove the pcp lists (just in case someone wants to toy 
> around with these things too). It hits tbench/SLUB badly because that 
> relies heavily on effective caching by the page allocator
> 
> tbench/SLUB:  726.25 MB/sec
> 
> Even adding the fast path prototype (covers only slab allocs >=4K 
> allocs) yields only 1825.68 MB/sec

So why is the new fast path slower than the old one? Because it is not
NUMA aware?

-Andi

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