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To: Tony Viola who wrote (81402)5/24/1999 12:14:00 AM
From: kash johal  Respond to of 186894
 
Tony,

Re: "What issues? Multiple CPU systems have been around since the 80's. There is no mystery about them. IBM has SMPs up to 12 way, Sun to 64, Intel to 8 (actually 9,000 way in the Sandia system). You design it, debug it, and ship it (MP), period. Overhead lost due to MP factors, about 25%."

For a lot of engineering stuff we do the software is not multi-threaded and so multiple CPU's buy you nothing. And we don't run additional apps when a task is running. So we don't run a spice simulation and a sunthesis run concurrently. The CPU's are just not fast enough.

I agree with your comments about using multiple processors for transaction processing where the individual tasks are small and I can see how multiple CPU's give you an almost linear performance advantage.

Best regards,

Kash



To: Tony Viola who wrote (81402)5/24/1999 12:43:00 AM
From: Scumbria  Read Replies (1) | Respond to of 186894
 
Tony,

Sorry, but I'll put the extra money into an extra CPU or two, rather than a chiller, every time.

Could you also say:
"Sorry, but I'll put the extra money into an extra x86 CPU or two, rather than a Merced, every time. " ?

Scumbria


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