Author: Robert Hyatt
Date: 14:07:47 09/13/03
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On September 13, 2003 at 11:26:37, Nolan Denson wrote: >Hey Dan > >I decided to compile and give your crafty MPC a try. I am getting very good >results but have notice something strange. I am not sure if this version is >suppose to be able to take advantage of hyper threading ... but when i run the >bench test my nps are better for a dual processor instead of a quad, But a >strange things happens when actual game play starts. Using it as a Dual Xeon my >nps (I compiled for multi-thread) 1536 nps avg, as a Quad the bench test is 1200 >nps. But when actual game play starts the Dual stays about the same. But the >Quad via Hyperthreading gets like 2100 nps ... Do you think is doing this on its >own, or is this MPC Crafty Hyperthreading enable. If an one know the files that >are involve ... i can make this MPC version truly Hyperthreading ...base on the >results I am getting now .. if this is not Hyperthreading now ... i think once >it is i should get around 2500-2600 nps. Something is wrong. Do you really have SMT turned on? IE I have some dual xeons here and hyper-threading definitely kicks the NPS up. Somewhere around 30% or so, for raw NPS... My dual 2.8 gets around 2.1M nodes per second on the default setting bench command with mt=4 But be sure that on a dual with hyperthreading on, you do mt=4, _not_ mt=2.
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