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

Miao Xie
2010-10-18T03:12:43Z

On Wed, 13 Oct 2010 14:31:47 -0700, H. Peter Anvin wrote:
> 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.

The following is the URL of the benchmark tool that I have posted.
http://marc.info/?l=linux-kernel&m=128652854608425&q=p3

Thanks
Miao