Author: Robert Hyatt
Date: 08:53:57 05/18/03
Go up one level in this thread
On May 17, 2003 at 20:50:52, Aaron Gordon wrote: >On May 17, 2003 at 15:21:53, Jeremiah Penery wrote: > >>On May 16, 2003 at 07:04:02, Aaron Gordon wrote: >> >>>On May 15, 2003 at 21:35:35, Nolan Denson wrote: >>> >>>>http://www6.tomshardware.com/cpu/20030513/index.html >>> >>>Look at the seti@home benchmarks, tell me nothing looks screwy there... >>>P4-3GHz w/ the same L2 & bus/memory speed as the P4-2.8 yet it 'magically' does >>>it in half the time? Riiiggghhhtt.. :) >> >>That would probably be because of Hyperthreading. > >Seti doesn't support multiple threads, and hyperthreading won't increase >performance 100%, especially for Seti@home. For the right instruction mix it will double cpu speed. Check out Eugene's comments about running the tablebase compression utility (two copies) on a single SMT-enabled CPU. This application apparently has just the right memory reference pattern and two copies will run in the same time that one will run... That's the only example I have heard of, but I haven't done a lot of checking to see if there are others...
This page took 0.02 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.