Messages in this thread |  | | From | Chris Evans <> | Subject | Re: MMX performance.... | Date | Thu, 6 Feb 1997 20:45:13 +0000 |
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On 6 Feb 1997, Robert Krawitz wrote:
> The Pentium memcpy() patch, BTW, has a lot of overhead of its own; it > dumps and restores the FPU state (when it's in use it dumps the > registers; when not, it dumps just the rest of the state). That's why > it's configured to operate only when the amount of data to be copied > is large. The overhead is well worth it, though, since memory > bandwidth on write is used so much more efficiently.
Is the Pentium memcpy patch in 2.1.x yet? If not, why not? Such a low level change should go into the development kernels as early as possible, surely...
Actually it's about time I started using development kernels on my personal box. I like to always run with the memcpy patch though. Is there at least a 2.1.x patch for it?
Chris.
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