Author: Joachim Rang
Date: 06:48:45 11/28/04
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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 Well, that's one position and not even the right parameter tested. Take the whole test and solve it with your three configurations and compare numbers of solution and solution found. regards Joachim
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