Author: Robert Hyatt
Date: 17:42:44 12/28/03
Go up one level in this thread
On December 28, 2003 at 16:07:38, Vincent Diepeveen wrote: >On December 27, 2003 at 19:00:30, Daniel Clausen wrote: > >>On December 27, 2003 at 14:05:23, Robert Hyatt wrote: >> >>>On December 27, 2003 at 12:36:32, Mridul Muralidharan wrote: >>> >>>>On December 27, 2003 at 09:04:05, Sune Fischer wrote: >>>> >>>>>On December 27, 2003 at 04:58:51, Mridul Muralidharan wrote: >>>>> >>>>>>4) Even with a 1:10 or 1:8 advantage crafty only barely manages to catch up or >>>>>>beat these top order programs - so not much of a chance if they show up with the >>>>>>above mentioned machines. >>>>> >>>>>I believe you are jumping to conclusions with "not much of a chance.." :) >>>>> >>>>>Crafty seems to be more than just barely holding on, it seems to be winning >>>>>these matches at 8-10x speed advantage. >>>>>That would mean Crafty still has chances even with "only" a 4x speed advantage. >>>>> >>>>>I'm not saying it would be a favorite but it's enough of a lottery to say that >>>>>there are chances, and who knows what kind of hardware Bob could get his hands >>>>>on ;) >>>>> >>>>>-S. >>>>>>Mridul >>>> >>>>True - a good opening line which is favourale to crafty - and it could win even >>>>with a 1 : 2 disadvantage :) >>>>But it should be a good line - and this is like a jackpot - we cant count on >>>>this ;) >>>>On a even position - with lots of possibilities (not one of those dead drawn >>>>boring opening lines) - it would be tougher. >>>>If 1:8 just barely helps - then 1:4 is going to be a real challenge - also note >>>>- it is going to be lower than 1:4 - not even 1:4 >>>> >>>>Mridul >>> >>>That's wrong. Pick your current box. I can _certainly_ find something that >>>will be 4x faster than any box that showed up at the WCCC this year. And that >>>is the reference point for this "test"... "would crafty be competitive." >> >>If they knew you'd show up they would also have got different hardware. :-D >> >>Sargon > >Not really, they all laugh loud. I had 250Ghz to my avail and got a good speedup >at it (after some minor startup trouble first few rounds). Right now i'm >calculating how much. It's already at > 100 right now. But the worst case being >i guess now 80-100 speedup out of 460. > >The problem for Bob is he has a big mouth about big machines, but he knows very >little about it. Actually, diep runs on most of those boxes and on all shared >memory machines. > >Crafty however will already not work at a 4 processor node when latency is 2 >microseconds to each node. > >Now let's discuss the 1Phz machine which he plans to get which is 4 times faster >than the 512 processor origin i ran at :) Vincent, you can _never_ follow a conversation here, for reasons I really can't possibly seem to understand. First, we were talking about _commercial_ programs and whether Crafty would have a chance against them. _nobody_ gives a flip about Diep, and I certainly have good enough chances against your program that I don't give it any serious thought. But back to the topic. The original question was "would Crafty be competitive against the top programs at the WCCC?" Based on Omid's very lame "if they thought they had a chance to win, they would come." Who here would consider your program to be in _that_ conversation? You are _not_ in "the top commercial programs". You are not in "the top programs". So who cares what you think here? I could _definitely_ have shown up with 4x+ faster hardware than any commercial program used, with no problem at all... And for those that don't use SMP search, it would have been far faster than even 4x. > >Note the fastest machine i can imagine which Bob could arrange where crafty runs >fine at is a 4 processor Opteron 2.0Ghz Or a Cray T932, which I have run on... Or an 8-way opteron where it runs like a screaming bat. Or even a 16-way opteron. Or a 16/32-way alpha that I have also used in the past... And there are some interesting Itanium boxes around as well... > >This is a great machine, but of course way slower than what some will show up >with at Tel Aviv. If you are talking about your machine, it really doesn't matter. It is a classic "quantity" vs "quality" issue. You have none of the latter, so having a lot of the former really won't help much... > >Best regards, >Vincent
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