Author: Amir Ban
Date: 16:43:27 07/07/03
Go up one level in this thread
On July 07, 2003 at 12:15:08, Uri Blass wrote: >On July 07, 2003 at 10:38:13, Louis Fagliano wrote: > >>On July 06, 2003 at 04:46:28, Thoralf Karlsson wrote: >> >>>Five months ago Shredder 7.0 appeared on the first >>>place of the SSDF Rating list after a rating increase >>>of more than 40 points. Now Stefan Meyer-Kahlen and >>>Sandro Necchi can be proud of another 40 points, which >>>places them 48 points ahead of the nearest competitor! >>> >>>After 465 games Shredder 7.04 UCI Athlon 1200 MHz, played >>>under the Classic Shredder-interface, has a rating of 2810! >>>Congratulations! >>> >>>We have started to play with Deep Junior 8.0, on a single >>>Athlon 1200 MHz, and will present the result on next >>>rating list, which will appear in August or September. >>> >>>Thoralf Karlsson >> >>Why not Junior 8 on a single Athlon 1200 MHz? Deep Junior 8 on a single >>processor runs more slowly than Junior 8. If you are going to use Deep Junior 8 >>at all, use it on multi processors or don't use it at all and use Junior 8. > >Are you sure about it? > >see http://www.talkchess.com/forums/1/message.html?304955 > >What is the reason for using more than one thread for a single processor >machine? > >Is it a bug? > >In that case it is hard to imagine that a programmer who develops a special >version for one cpu is going to use 2 cpu's by accident so the only possible >reason that I can think about is that chessbase simply put the wrong file in >Junior8 and instead of using a file of Junior8 used a file of Deep Junior8 but >in this case it is easy to fix it. > >The fact that chessbase probably did not fix it(otherwise mike byrne could use >Junior8 and not Deep Junior8 in his tournament) suggest that it is not the >reason so what is the reason? > > >A possible reason that I can imagine is that chessbase know that people use >duals and may want to test Junior8 against other programs in a dual. >In other words the reason is cheating the customers to think that Junior is >better than it's real level. > >Fortunately posters like Mike byrne noticed the problem but Mike did not notice >the problem in the first game and there may be other people who did not notice >the problem and I wonder how many people ordered Junior8 based on reading >results like mike byrne's results or hearing results of their friends without >knowing that Junior8 is using more than one cpu. > >Maybe Amir Ban can explain better what happened. > Junior8 does not have SMP code and can't use more than one processor at a time. Amir
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