Messages in this thread |  | | | From | Andi Kleen <> | | Subject | Re: [PATCH RFC] [x86] Optimize copy-page by reducing impact from HW prefetch | | Date | Wed, 22 Jun 2011 13:05:41 -0700 |
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ling.ma@intel.com writes: > impact(DCU prefetcher), and simplify original code. > The performance is improved about 15% on core2, 36% on snb respectively. > (We use our micro-benchmark, and will do further test according to your requirment)
This doesn't make a lot of sense because neither Core-2 nor SNB use the code path you patched. They all use the rep ; movs path
-Andi
-- ak@linux.intel.com -- Speaking for myself only
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