Author: Robert Hyatt
Date: 10:51:02 04/28/05
Go up one level in this thread
On April 28, 2005 at 07:52:27, Vincent Diepeveen wrote: > http://www.sudhian.com/showdocs.cfm?aid=667&pid=2543 > >In world champs 2004 at quad opteron 2.0Ghz diep got about 380k nps in >openingsposition. > >529k nps at dual core dual opteron. It's just incredible. Scaling 3.92 >Quad opteron world champs 2004 scaled 3.93 > >This was a net2003 executable compiled in 32 bits. Intel c++ compiles were >slower. I think their data or test is a bit broken. I have dual PIV's here, both my xeon, and a dual 3.6 in the lab. My scaling from 1 to 2 threads (no hyper-threading turned on) is way better than 1.67X using 2 threads. For example, on my dual xeon, a quick test produced 1.51M nps using a single processor, 2.89M using both. Which is a 1.91X increase in NPS. On a 4-way 850, I have large tests that produce 2.32M for one cpu, 8.69M for four cpus, which is 3.75X faster. Comparing apples to apples, the dual 850 NPS was 4.53M, which turns into 1.95X faster. So for me, the dual xeon and the dual opteron produce almost identical NPS scaling, although the opteron is about 2x faster per cpu...
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