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Technology Stocks : Advanced Micro Devices - Moderated (AMD) -- Ignore unavailable to you. Want to Upgrade?

To: dale_laroy who wrote (69620)	1/31/2002 1:09:30 PM
From: Tenchusatsu	Read Replies (1) \| Respond to of 275872

Dale, thanks for the brief explanation of PMMU. Guess combjelly was right; I didn't know something so prevalent today used to have a special name. <Directory based cache coherency is probably a reasonable description of what I was talking about.> The problem with directory-based coherency is that it's awfully difficult to implement. I can't imagine it being used in anything other than large mainframe-type systems, the true NUMA-style machines where accessing memory on a remote node is much slower than accessing a local node. AMD's approach wouldn't require directory-based coherency, since a remote access isn't that much longer than a local one. Tenchusatsu