Messages in this thread | | | Subject | Re: Intel vs AMD x86-64 | From | Albert Cahalan <> | Date | 24 Feb 2004 10:29:07 -0500 |
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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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