Author: James T. Walker
Date: 12:27:56 11/02/05
Go up one level in this thread
On November 02, 2005 at 13:17:13, Gregory Owett wrote: >On November 02, 2005 at 12:45:14, James T. Walker wrote: > >>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. >> >>Yes Sarah I just started a match between Fruit and Shredder 8 in Chessbase GUI. >>I left pondering on and left Shredder at 2 threads. It seems that sometimes >>Fruit gets 50% and sometimes it's fighting Shredder for cpu time and only gets >>25%. Also sometimes it's inbetween 25%-50% for Fruit. So It's only fair to set >>Shredder to 1 thread in this case. >>Jim > >In this case, ponder off is essential, I believe. > >Gregory Hello Gregory, I don't do "ponder off" testing. I prefer to run programs in their natural settings. I realize some people do the ponder off and that's their perogative. It provides information of a different nature than what I'm interested in. When I solve my connection problem between my two computers I will be able to play the Deep programs on the dual core vs the single cpu programs on a separate computer. It's the only way I test programs. Jim
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