July 29, 2005
12:14 p.m.
Hi,
yes, but the binaries I downloaded are for the P4 processor, so I'm not sure how much more specific I can get. I'm going to give it a try.
There is some tuning that is specific to the cache, which might change things a bit. Is it possible your test code uses NaNs at some point? That will result in a huge slowdown on the P4 with the default ATLAS binaries: http://www.mrc-cbu.cam.ac.uk/Imaging/Common/spm_intel_tune.shtml#nan_problem Matthew