[Numpy-discussion] LAPACK/BLAS for Fedora core 4 i386 ?

Matthew Brett matthew.brett at gmail.com
Fri Jul 29 12:14:21 CDT 2005


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




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