Cached file read performance
Attilio Rao
attilio at freebsd.org
Sat Dec 23 09:07:33 PST 2006
2006/12/23, David Xu <davidxu at freebsd.org>:
> On Saturday 23 December 2006 03:29, Alexander Leidinger wrote:
>
> > I want to point out http://www.freebsd.org/projects/ideas/#p-memcpy
> > here. Just in case someone wants to play around a little bit.
> >
> > Bye,
> > Alexander.
>
> I have read the code, if a buffer is not aligned at 16 bytes boundary,
> it will not use FPU to copy data, but user buffer is not always 16 bytes
> aligned.
If the buffer is not aligned, speedup improvement is so small to be near at 0%.
Attilio
--
Peace can only be achieved by understanding - A. Einstein
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