Author: Anthony Cozzie
Date: 09:18:22 11/12/03
Go up one level in this thread
On November 12, 2003 at 11:55:20, Gian-Carlo Pascutto wrote: >On November 11, 2003 at 23:42:45, Eugene Nalimov wrote: > >>My point is: it's possible that due to the fact that quad Opteron is NUMA -- >not SMP -- system, for SMP-only program performance on quad Opteron can be >>worse than on *real* quad SMP system, even when for one CPU Opteron >>performance is much better. Itanium was used only as an example of such >>system, I never recommended rewriting any program for it. > >I don't understand how. The NUMA part is RAM. Even worst case on the Opteron >RAM is faster than Xeon SMP. So how could it ever be worse? > >-- >GCP Aaron's argument is: if a 1x opteron is faster than a 1x Xeon, a 4x opteron will be faster than a 4x Xeon. Nalimov is saying that Fritz may scale worse on the opteron due to NUMA issues. In other words, this is comparing latency with 1x opteron and NUMA opteron relative to 1x Xeon vs SMP Xeon. Off hand this seems logical to me . . . anthony
This page took 0.01 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.