Author: Gregory Owett
Date: 08:45:57 11/02/05
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On November 02, 2005 at 11:12:38, Uri Blass 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. > >results may be because of luck so they do not prove nothing. >The way to check it is to look at the number of nps. > >I am also not sure if Shredder is a single threaded engine. > >Shredder9 is only for single processor but I remember that at some point of time >there was no deep shredder and shredder was SMP capable. > >> >>(Native engines, as F8, J9, H9, CT15 etc...use 99% too.) > >No by definition they cannot do it because they were not programmed to do it. > >Hiarcs and tiger always supported only a single processor so claiming that they >use more than 50% cannot be correct. > >Uri It is precisely where there is a "mystery", why task manager indicates 99%, whereas these engines supported only a single processor, as you say. Gregory
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