Re: Intel vs AMD x86-64

[Albert Cahalan]

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


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