Re: [PATCH V2 -tip] lib,x86_64: improve the performance of memcpy()for unaligned copy

From: H. Peter Anvin
Date: Wed Oct 13 2010 - 17:32:24 EST


On 10/08/2010 02:02 AM, Miao Xie wrote:
> On Fri, 8 Oct 2010 15:42:45 +0800, Ma, Ling wrote:
>> Could you please give us full address for each comparison result,we will do some tests on my machine.
>> For unaligned cases older cpus will crossing cache line and slow down caused by load and store, but for nhm, no necessary to care about it.
>> By the way in kernel 64bit mode, our access mode should be around 8byte aligned.
>
> Would you need my benchmark tool? I think it is helpful for your test.
>

If you could post the benchmark tool that would be great.

-hpa
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