Author: Bryan Hofmann
Date: 06:40:13 11/06/05
Go up one level in this thread
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
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