Author: Peter Skinner
Date: 11:56:12 07/16/03
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On July 16, 2003 at 14:39:11, Keith Ian Price wrote: >On July 15, 2003 at 07:55:56, Pavel Blokhine wrote: > >>I am downloading Shredder 7.04 from chessbase but I am having problme with it. >>It has an erratic kN/s and often showss 100 kN/s, 70 and then jumps to 1000, >>then goes back to 16 kN/s.I have dual xeon 3.06 ghz so I know i should never get >>those 16 kN/s even in endgames. So why isn't the the kN/s more steady even at >>the beginning of the game? Also, when I am downloading it, it's not showing >>immediately in my C:\program files\chessbase\engines. > > >I have noticed the same, and with Shredder 7, as well. Also, if I limit it to >one thread, the average kNs drops from 750 to 450, but the search reaches on >average 1/2 ply deeper. I am wondering if the SMP implementation is hosed in >Shredder, or is there no correlation betweem ply and kNs in normal SMP? > >kp I have noticed the same. For some reason the node counter seems messed up when using two threads. I don't notice a difference in play with two processors over one, it doesn't seem to scale well. For the most part, I have noticed little to no speed up using two processors with _any_ program from Chessbase (ie. Fritz, Junior, Shredder). The only one that I do notice the speed up is the version of Crafty that is on their site. Other than that, I would have to say that the smp support from Chessbase is horrible at best. I am sticking to a single from now on. I will use my dual for my graphic processing.
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