ATLAS

[Tatsuro MATSUOKA]

Micheal wrote;
Theoretically, it's suboptimal. In practice, I ran a benchmark script in octave 
with 2 versions of ATLAS: one compiled for P4 (512KB L2 cache) and one 
compiled for Centrino (2MB L2 cache). The test was run on the Centrino 
CPU. Both ATLAS versions brought big speed-up compared to the generic 
Fortran libraries, but the gain of using a Centrino-compiled ATLAS instead 
of a P4-compiled ATLAS was not that high (IIRC it was < 10%). I didn't test 
the other possibility: running the Centrino-based ATLAS on the P4 machine. 
The binary installer only provides the P4-compiled ATLAS, which probably 
provides good results on most CPU out there (P4, AMD, Centrino...) 
***************
I have a question just for my reference.
What version ATLAS did you select for ?
stable 3.6.0
develeopment(unstable) 3.7.xx

The 3.6.0 is surely stable but I feel it is too old now.
For 3.7.x, the term unstable make me anxious.

Tatsuro




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