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

To: Ali Chen who wrote (41533)	5/29/2001 1:17:09 PM
From: milo_morai	Read Replies (1) \| Respond to of 275872

Ali, are you LONG AMD like your profile states? Just curious. M.

To: Ali Chen who wrote (41533)	5/29/2001 7:06:36 PM
From: pgerassi	Respond to of 275872

Dear Ali: You can see this effect when looking at history of Alpha based systems. The shared bus systems simply do not scale well. P2P systems scale much better. Most large servers are of ccNUMA types where they are more like P2P systems than shared bus systems. I read somewhere that the ideal way to spread CPUs in a 8 way P3 box is to install them in pairs, one to each of the two FSBs. In shared bus systems the 2nd CPU adds around 50% or so, the third CPU about 33%, and the last about 15%(of the single CPU perf). This is typical and changes depending on application type. DB serving shows less than these especially when the bus is near saturation with just one. Pete