Author: Barry Culp
Date: 15:05:07 11/27/04
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
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