Author: Vincent Diepeveen
Date: 10:10:23 09/03/03
Go up one level in this thread
On September 03, 2003 at 11:52:01, Robert Hyatt wrote: >On September 03, 2003 at 02:24:00, Gian-Carlo Pascutto wrote: > >>On September 02, 2003 at 22:34:49, Robert Hyatt wrote: >> >>>>Been working a year fulltime now :) >>>> >>> >>>So? It took you over a year to get your parallel search working. It took >>>me weeks. >>> >>>:) >> >>In all fairness, he did a full DTS implementation, including rewriting the >>program to a nonrecursive search, while you took an easy way out. > >_I_ did the _original_ DTS implementation, don't forget. It didn't take >me years. I started to work on it in March of 1987 and I finished my Ph.D. >completely in August of 1988, which included months of testing to produce the >data. > > >> >>Diep's parallel performance does seem to be better than what you and I are >>getting. >> >>I wouldn't make that design decision for the common 2 or 4 way machines >>you are most likely to end up working with, but given that he's now >>working with 512, I'm sure it has payed off handsomely in the meantime. >> >>Likewise, optimizing a program for Opteron NUMA is a whole different animal >>than optimizing it for a 512 CPU NUMA Sun Altix. >> >>I agree optimizing Crafty for the Opteron won't take an entire rewrite, >>but please don't go claiming that 'NUMA-Crafty' will run well on any NUMA >>machine. > >It _will_ "run on any NUMA machine." If you want to say it won't run well >with 512 cpus, I agree. But then again, it won't run well on 512 CPUS if >the machine is pure SMP either. The issues are different. > >However, Crafty _does_ have some stuff to make it run reasonably well on 32 >cpu boxes. I've already done that. Ok here my statement. Crafty won't run well on 16 processors of P7 from the TERAS supercomputer. It will be a horror & co show i am sure of it. > > > >> >>-- >>GCP
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