Author: Robert Hyatt
Date: 11:21:08 05/24/04
Go up one level in this thread
On May 24, 2004 at 12:56:48, Joshua Shriver wrote: > >>> >>> I really hope you can participate. This may be offtopic. But *are* there quad >>>and 8 CPU opteron machines? >> >>Yes. I used a quad opteron 2.2ghz in the last CCT event. And I ran on an 8-way >>but could not get dedicated access for the event so I went with the quad... >> > >By 8-way do you mean a single motherboard with 8 CPU's or an 4 or 8 node cluster >with single or dual CPU's? I mean 8 CPUs with shared memory in the usual AMD NUMA configuration. IE just like the 4 cpu machine I used in CCT. "cluster crafty" will probably come late this summer. It is an official project of mine now... > >Man I wish I had one of those quad opterons.. or even a single :) >Wonderful machine... yes they are. Check out the CCT6 log files for some amazing numbers. IE in the game against Junior I was seeing 16-18 ply searches most every time... > >Dr. Hyatt.. > Do you have any Opteron (AMD64) enhancements in crafty? Yes. I have inlined FirstOne()/LastOne() to use the 64 bit AMD BSF/BSR instructions. There were several changes dealing with updating global shared data that were made to cut down on cache-to-cache (MOESI) transactions and overhead. There were changes made to make local data be allocated in a processor's local memory to decrease access time. Etc...
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.