Author: Gregory Owett
Date: 10:09:51 11/02/05
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On November 02, 2005 at 12:37:09, Chessfun wrote: >On November 02, 2005 at 12:28:37, Gregory Owett wrote: > >>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. > >Of course there is. Open the engine parameters and change threads from 2 to 1 >it's there believe me I've done it. > >Sarah. Indeed, you are right with regard to Shredder, it exists the possibility of choosing the number of treads, but I do not see for the others engines. It may be, that the choice is done automatically. Gregory
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