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

[Andi Kleen]

ling.ma@xxxxxxxxx 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@xxxxxxxxxxxxxxx -- Speaking for myself only
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