Author: Slater Wold
Date: 01:40:19 04/14/02
Go up one level in this thread
On April 13, 2002 at 04:25:20, Bernhard Bauer wrote: >On April 12, 2002 at 18:33:16, Gian-Carlo Pascutto wrote: > >>On April 12, 2002 at 18:31:09, Gian-Carlo Pascutto wrote: >> >>>On April 12, 2002 at 18:07:26, bob o wrote: >>> >>>>2.I read somewhere that a 2 CPU machine would give an 80% increase in NPS. Does >>>>this mean that there are diminishing returns with each extra CPU? >>> >>>Yes. >>> >>>What's even more worrying is that the latest public SMP Fritz >>>(Deep Fritz) only had an increase of 30% with an extra CPU, >>>not 80%. >> >>Little correction: what I was talking about wasn't pure NPS, since >>that doesn't say anything in a parallel search, but the speedup. >> >>You can use a 1000-way system, get 1000 times the NPS and not go >>a single precent faster. >> >>-- >>GCP > >That's right. 8 CPU's give about 8-times the nps of a single CPU system. >Bernhard Hell no that isn't right. There is at LEAST a 30% penalty for SMP on an 8-way box.
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