Author: Gregory Owett
Date: 07:02:59 11/06/05
Go up one level in this thread
On November 06, 2005 at 09:40:13, Bryan Hofmann wrote: >On November 06, 2005 at 09:03:04, Andreas Guettinger wrote: > >>On November 06, 2005 at 07:48:20, Bryan Hofmann wrote: >> >>>On November 06, 2005 at 07:29:56, Gregory Owett wrote: >>> >>>>On November 06, 2005 at 07:13:26, Bryan Hofmann wrote: >>>> >>>>>On November 05, 2005 at 08:47:34, Gregory Owett wrote: >>>>> >>>>>>When Crafty plays vs another engine, in adjustment "ponder=off", it is pondering >>>>>>and the taskmrg indicates 99% to Crafty and 0% to the other. Even if its >>>>>>adversary plays, the indicator gives him 50% and 50% to the other engine, >>>>>>whereas Crafty should have 0%. Does it profit from the time of reflection of >>>>>>the other engine? If not, why it does not release the processor? >>>>>> >>>>>>Gregory >>>>> >>>>>If you are using a version prior to 19.16 then you will see this behavior. In >>>>>version prior to 19.16 Crafty does not release the parallel CPUs, even tho it is >>>>>not using them (pondering/thinking). >>>>> >>>>> >>>>>Bryan >>>> >>>>That explains all. I used the version 19.11 SE. >>>>It is one of the best, isn't it? Is there a better according to you? >>>> >>>>Thanks. >>>> >>>>Gregory >>> >>> >>>I just did some checking, version 19.16 and higher will terminate the additional >>>threads only when the game has ended. It will still hold on to the additional >>>threads during the game even though it is not think/pondering the move. So the >>>issue described still exists in all SMP version of Crafty. >>> >>> >>>Bryan >> >>I don't see the problem there. Crafty could hold 100 threads and still use 0% of >>CPU time. It dosen't need to release the threads when the opponent is thinking. >> >>regards >>Andy > >If you have a dual core and wanted to run a match with with SMP engines with >pondering off it would be a issue. Crafty even with ponder off will keep CPUs 1 >busy, only CPU 0 would be free for the other engine. > > >Bryan It's what it arrived to me during a game, Crafty against Zappa. Gregory
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