Author: Robert Hyatt
Date: 15:27:39 05/27/99
Go up one level in this thread
On May 27, 1999 at 13:18:25, Vincent Lejeune wrote: >On May 27, 1999 at 08:52:03, blass uri 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. >> >>How much faster does crafty get with 2 processors? >> >>Is there an overlapping when both processors analyze the same position in >>different move order without knowing it? >> >>Do the 2 processors work all the time or maybe in part of the time >>one processor must wait? >> >>Uri > >I heard numbers like : > >1.9x with 2 processors >3.5x with 4 processors >12x with 16 processors > >But Bob will clarify these number later for us ... Those are close for Cray Blitz. I have not yet gone quite that far in Crafty, because debugging Cray Blitz took 15 months _full time_. One day I may dive in again, but at present, am happy with 3.2X with 4 (unknown with 16 so far).
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.