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    SubjectRE: [PATCH V2 -tip] lib,x86_64: improve the performance of memcpy() for unaligned copy
    Sure, I will post benchmark tool and benchmark on Atom 64bit soon.

    Thanks
    Ling

    -----Original Message-----
    From: H. Peter Anvin [mailto:hpa@zytor.com]
    Sent: Thursday, October 14, 2010 5:32 AM
    To: miaox@cn.fujitsu.com
    Cc: Ma, Ling; Ingo Molnar; Andi Kleen; Thomas Gleixner; Zhao, Yakui; Linux Kernel
    Subject: Re: [PATCH V2 -tip] lib,x86_64: improve the performance of memcpy() for unaligned copy

    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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