Author: Robert Hyatt
Date: 10:45:51 09/03/03
Go up one level in this thread
On September 03, 2003 at 13:10:23, Vincent Diepeveen wrote: >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. "I am sure of it." "I can proof that ruffian is just a copy of shredder". "I am sure that the pentium doesn't cache above 200mb or so." "I can proof that you can't get a decent speedup on a cluster with 100mbit ethernet." "I can proof that crafty gets a 1.0 speedup on my dual AMD" (no speedup at all.) "I can proof that I get a speedup of > 2.0 on a dual processor machine." Your statements stand for themselves. All are wrong. All are _obviously_ wrong. > >> >> >> >>> >>>-- >>>GCP
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