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To: Dan3 who wrote (140399)7/29/2001 6:36:10 PM
From: Tenchusatsu  Read Replies (2) | Respond to of 186894
 
Dan, <But putting even two chips on such a bus results in contention for the memory bus.>

Absolutely false. It doesn't matter whether you have a single multiprocessor bus or two P2P processor interfaces. They're all going to access one memory bus anyway, at least on Intel's and AMD's dual-CPU chipsets.

<It's a simple bus that doesn't scale well for multiprocessor applications, but it does make it easy to add additional processors, however fast any incremental benefit may fade.>

The performance scaling is almost double when you go from one to two processors on the Foster bus. That's good enough to match the scalability of the EV6 bus architecture. As for going past 2-way, well AMD isn't there yet so your point is moot.

<Xeon is also limited to caching 12 locations for any given offset.>

Please explain. I can't tell whether you are talking about the cache, the TLB, or something else.

Tenchusatsu