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To: Ali Chen who wrote (119157)	11/24/2000 11:39:47 PM
From: Dan3	Read Replies (1) \| Respond to of 186894

Re: Although there are multiprocessor P-III and Xeons, there is not a single SPECfp score reported in the SPEC publications. I think it's because the L2's must maintain coherency, which greatly reduces their effectiveness in multiprocessor systems (for a given, single, thread). Any single threaded benchmark would perform better on an otherwise identical uniprocessor vs. multiprocessor system. Sledgehammer wouldn't suffer this performance hit if the L2 was shared between the two cores. Check out slide 15 in this presentation and see if you think that might be an explanation: cs.washington.edu Regards, Dan