Re: [PATCH RFC] [x86] Optimize copy-page by reducing impact from HW prefetch

From: Andi Kleen
Date: Wed Jun 22 2011 - 16:07:32 EST 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


ak@xxxxxxxxxxxxxxx -- Speaking for myself only
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