Author: Robert Hyatt
Date: 21:19:09 03/07/02
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On March 07, 2002 at 23:56:46, Nolan Denson wrote: >Ok the Bios update that i was hoping for did not have the enable for Hyper >Threading ... I was hoping to run some test to get some bench mark results. I >told my motherboard company about the new bios that was suppose to have the >feature didn't ... then i was told ( not sure if this was a blow off or not) >that my motherboard automatically does hyper threading. > >So what I am wondering do any of you know of a program thats around i can test >this feature. > >Also if there isn't a program around chess or utility, I was wondering to get >Crafty to see 4 cpu's via Hyper Threading what is the main part of its code do >you think i will have to modify .. or for Dr Hyatt (Is it even possible for me >to get crafty to take advantage of this feature with out having to do a complete >rewrite). > >I did some simple things to my crafty.rc file but it didn't help. > >smpmt 4 >smproot >smpgroup 4 > >Anyone that know of a program I can test ... drop a post ... > >Thanks I have not followed the hyper-threading stuff from Intel, although I will try to look at it tomorrow. I originally thought it was just multiple threads within a single CPU, so that when one thread blocked on a memory reference, another thread could execute during that wait time. For Crafty, that won't be anywhere _near_ the same as using 4 separate CPUs, each of which can read/write memory independently. I would not look for this to produce any significant speedup for programs that have a lot of memory accesses, like a chess engine. I would expect it to work better for the case where you have one thread that does a lot of memory reads/writes, and another thread that simply sits in cache and computes like mad...
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