Messages in this thread | | | From | "Ma, Ling" <> | Date | Thu, 14 Oct 2010 09:14:23 +0800 | Subject | RE: [PATCH V2 -tip] lib,x86_64: improve the performance of memcpy() for unaligned copy |
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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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