Author: Jason Kent
Date: 16:12:03 11/27/04
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On November 27, 2004 at 18:05:07, Barry Culp wrote: >I know there was a long thread earlier on hyperthreading and engines that >support multiple processors. I ran some tests from the Chessbase Testsets folder >using the Marathon base test 1622 ECM, game #208 (solution ..Nxh7). My system is >a P4 3.6ghz with 2gb RAM. All tests used Shredder 8, 1gb hash, default engine >options except learning disabled and style=aggressive. I ran each test twice to >see if results were consistent. > >Test 1 - Hyperthreading disabled in BIOS - Shredder threads = 1 > time 11:53 ply 18/50 nodes 303621 > time 11:39 ply 18/50 nodes 303621 > >Test 2 - Hyperthreading enabled in BIOS - Shredder threads = 2 > time 10:45 ply 18/43 nodes 335338 > time 11:08 ply 18/46 nodes 345877 > >Test 3 - Hyperthreading enabled in BIOS - Shredder threads = 1 > time 11:27 ply 18/50 nodes 303621 > time 11:35 ply 18/50 nodes 303621 > >I was thinking off turning hyperthreading OFF on my system but after these tests >I dont think I will :) > >Barry It would be interesting to see how a program like ruffian would do since it is designed for only one processor.
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