Messages in this thread | | | Date | Wed, 8 Sep 2010 15:05:19 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH V2 1/3] lib: introduce some memory copy macros and functions |
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On Wed, 08 Sep 2010 20:57:07 +0800 Miao Xie <miaox@cn.fujitsu.com> wrote:
> On Wed, 8 Sep 2010 14:19:25 +0200 (cest), Andi Kleen wrote: > > > >> According to the data, the length of the most copies is>=128. > > > > Thanks for the data. Large is easier to optimize than small, that's > > good. > > > > Could you also measure how many memsets need the backwards copy? > > (should be easy to add) > > I think memset doesn't need the backwards copy.
I meant for memmove of course. Obviously memset doesn't need a backwards copy. That was just the only thing the script didn't measure because the original version didn't have memmove support.
Your whole thread was about making memmove faster, right?
-Andi -- ak@linux.intel.com -- Speaking for myself only.
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