Author: Robert Hyatt
Date: 15:29:46 05/27/99
Go up one level in this thread
On May 27, 1999 at 08:46:16, Dave Gomboc wrote: >On May 27, 1999 at 08:02:59, Robert Hyatt wrote: > >>On May 27, 1999 at 03:06:39, Jouni Uski wrote: >> >>>On May 27, 1999 at 03:02:37, Ed Schröder wrote: >>> >>>>On May 27, 1999 at 02:50:08, Marcus Kaestner wrote: >>>> >>>>> >>>>>>Who cares, it will be a great show anyway. >>>>>> >>>>>>Ed Schroder >>>>> >>>>>ed, you´re right. >>>> >>>>And I expect that some of so called big-names will have a very hard >>>>time as anything can happen in this super strong tournament. IMO there >>>>are 7-10 programs who can win this tournament. >>>> >>>>When I voted on CCC that was difficult. In the end I picked: Chess Tiger, >>>>Rebel (why not), Dark Thought, Conners and Zugzwang but I could have add >>>>many more. >>>> >>> >>>Never heard about Chessbase engines: Fritz,Hiarcs,Junior + multiple prosessors? >>> >>>Jouni >> >>It is not very 'clear' but the famous 'grapevine' would say these parallel >>engines are not very effective. And this can also be predicted because of the >>machines they are using. IE who would use a dual-cpu machine when quads are >>readily available... _unless_ you are doing something pretty ugly in the >>parallel search world: splitting only at the root. Just idle speculation since >>we won't ever hear of any 'good' algorithm of course. But I have heard that >>at least one of those is only getting 1.3X faster with 2 processors. And I once >>had a program like that (Cray Blitz, 1983) as we only had 2 weeks to do a >>parallel search and that was the only practical way to pull it off.) >> >>So running on a dual PII/550 will act like running on a single processor @ >>550*1.3mhz, which is a bit faster than Ed's hardware, but not a lot... > >It was reported that Junior is running on a quad, getting a speedup of about 3. >This doesn't sound much different from Crafty... > >Dave I wasn't specifically mentioning Junior. The 'grapevine' is anonymous so I can't say more. Perhaps one day these guys will report their results with some tests that show how they are doing... In parallel programming, rumors abound. Results are often less spectacular when scrutinized. But until you have something to scrutinize.... :)
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