Author: Slater Wold
Date: 03:18:46 04/14/02
Go up one level in this thread
On April 14, 2002 at 04:48:01, Uri Blass wrote: >On April 14, 2002 at 04:40:19, Slater Wold wrote: > >>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. > >30% panelty is about speed and not anout np's. > >Uri If there is a 30% penalty, um, then, you're going to have 30% less NPS.
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