Author: Gian-Carlo Pascutto
Date: 11:21:10 12/17/02
Go up one level in this thread
On December 17, 2002 at 13:15:36, Robert Hyatt wrote: >On December 17, 2002 at 11:58:21, Gian-Carlo Pascutto wrote: > >>On December 17, 2002 at 11:27:18, Matt Taylor wrote: >> >>>Crafty gets better results with HT, >> >>In addition to what Vincent said, the data we currently >>have is saying exactly the opposite. >> > >I don't follow. I posted the following twice already: I've done my own tests. >1 thread, SMT disabled, 24 positions, run twice, 1001.5K nps >2 threads, SMT disabled, same conditions, 1604.5K nps >3 threads, SMT enabled, same conditions, 1820.25K nps >4 threads, SMT enabled, same conditions, 1923.0K nps > >Hyperthreading took the 16.04.5K nps for two bare xeon processors and >improved that by 20%. I can certainly post the raw data if it is important. >I believe 20% is definitely better than 11%. And 20% is not something to wave >off as unimportant. I measured similar numbers for 1->2 cpus (24%). But this is only NPS increase, not the actual speedup which will be lower. -- GCP
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.