Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: [Linux-fbdev-devel] Re: fbcon slowness [was NTP on 2.4.2?] | From | (Eric W. Biederman) | Date | 04 Apr 2001 01:50:41 -0600 |
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Alan Cox <alan@lxorguk.ukuu.org.uk> writes:
> > > The MMX memcpy for CyrixIII and Athlon boxes is something like twice the > > > speed of rep movs. On most pentium II/III boxes the fast paths for rep movs > > > and for MMX are the same speed > > > > As long as you are copying in real memory. So the PCI bus or the host bridge > > implementation may be the actual limit. > > The CyrixIII sits on the same host bridges as the intel processors
I don't know if it applies to this case but one thing I have seen make a noticeable difference is whether or not write-combining is enabled. If we have only be enabling MTRR's for intel this could do account for it.
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