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

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

>>> Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> 13.01.09 00:29 >>>
>I'm guessing the gcc optimizer for the memcpy code was tuned
>for an Intel pipeline... Jan, were you measuring on an
>AMD processor?

Oh, actually my previous reply was without pushing my thinking fully back
to what I was doing (and measuring) back then. I really measured on quad
core Xeons, as what I was looking at were the highmem helpers. Pretty
likely this almost exclusively covered the cold cache (all levels) case, but I
also think this is the most likely scenario.

Jan


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