Author: Gregory Owett
Date: 09:28:37 11/02/05
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On November 02, 2005 at 11:24:10, Chessfun wrote: >On November 02, 2005 at 10:57:35, Gregory Owett wrote: > >>Recently, I launched two tournaments (ponder off) with the same participants, on >>two different machines. Here results: >> >>On P4 2.2 T=15'+5" : >> >>1. Fruit 2.2.1 KS104 7,5 / 10 >>2. Shredder 9 UCI 5,5 >>3. Shredder 7.04 CLm1 5 25,00 >>4. Fruit 2.2.1 Uri 5 23,00 >>5. Shredder 8 CLD 3,5 17,25 >>6. Fruit 2.2.1 3,5 16,50 >> >> >>On AMD x2 dual core 4800+ T=15'+5" : >> >>1. Shredder 8 CLD 6,5 / 10 >>2. Fruit 2.2.1 Uri 6 >>3. Fruit 2.2.1 KS104 5 25,75 >>4. Fruit 2.2.1 5 24,25 >>5. Shredder 9 UCI 4,5 >>6. Shredder 7.04 CLm1 3 >> >> >>The success of Shredder 8 CLD (UCI) on the dual core machine, confirms what the >>task manager indicated, i.e. which Shredder 8 CLD, in spite of it is >>single-threaded engine, used 99% of the two processors, while all the others >>used 50%, in other words, only one processor. >> > >Well both Shredder 7 and 8 were SMP capable. So you must edit engine parameters >and tell it to use only one thread. > >>(Native engines, as F8, J9, H9, CT15 etc...use 99% too.) >None of those in single versions are SMP capable so I would say on a dual that >is impossible. > >>Peter Kasinski thinks that Windows task manager is confused and carryforwards >>incorrectly. > >I have run every engine and observed task manager and it seems to switch all >correctly I've seen no odd behavior at all. > >Sarah. The goal, it is rather than the engines use two processors instead of one! But by editing the parameters, for example for Shredder, there is no possibility of choosing one or two processors to be used. Try to charge a native (as Fritz for ex.),and looks at task manager what it indicates when the engine thinks. Gregory.
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