Author: Robert Hyatt
Date: 06:41:35 11/01/05
Go up one level in this thread
On November 01, 2005 at 08:44:13, Gabor Szots wrote: >Just one more thing came into my mind. I have run the Crafty bench command on >both an AMD XP 2500+ machine and the P4 3GHz machine I was talking about in the >previous thread. I don't remember the exact values but both were around 800 >kNps. Does it not show that the P4 is only 50% used? > >Gábor HyperThreading will add about 10% to crafty's NPS if you use mt=2 in your crafty.rc file. The problem is the parallel search loses 30% of one CPU typically, which makes this a net loss of performance... Don't turn it on with Crafty running. And for reference, a single 2.2ghz amd opteron is more than twice as fast as my dual 2.8ghz intel PIV xeon in terms of raw NPS, even faster when time-to-depth is measured...
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