RE: [Xen-devel] [PATCH] x86: add SSE-based copy_page()

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

>>> Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> 12.11.08 15:51 >>>
>I assume the 12% faster is on a benchmark...

It's the win for an application doing nothing but dirtying private mappings
of a file. That seemed like the least overhead test that wouldn't require any
special testing code in kernel or hypervisor.

>Have you measured how much faster the copy_page_sse2
>routine (standalond) is than the memcpy?  Is it a
>factor of 2?

No, I didn't.

Jan


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