Re: Intel vs AMD x86-64

Albert Cahalan
2004-02-24T17:52:11Z

On Tue, 2004-02-24 at 12:34, Dave Jones wrote:
> On Tue, Feb 24, 2004 at 10:11:22AM -0500, Albert Cahalan wrote:
>
> > > so this isn't possible. The amd64 GART driver goes to great
> > > lengths to make sure it does update the northbridges on every
> > > CPU whenever something changes.
> >
> > Of course. That's the easy way; you won't need
> > to worry about memory interleave or out-of-bounds
> > prefetch if you keep everything coherent.
> >
> > I'm just saying it would be neat, and potentially
> > useful, to intentionally violate this. Of greatest
> > interest would be the 2-way Opteron boards that
> > only have RAM connected to the CPU closest to PCI.
> > The sidecar CPU :-) could be ignored.
>
> Why on earth would you want to do that ?
> It wouldn't buy you anything at all other than a world of pain.

faster IO-MMU operations