ATLAS Pentium III Timings

From user mail, it seems that few people appreciate that there is a fairly significant gap between stable and developer performance for a variety of machines. This graph compares the performance of ATLAS 3.5.6 and 3.4.1 using double precision matrix multiply and LU factorization.

DGEMM and LU Factorization on 1 Processor of 1.0Ghz PIII (laptop)

This graph gives the same information for single precision real:

SGEMM and LU Factorization on 1 Processor of 1.0Ghz PIII (laptop)

Note that the 3.5.6 install used a CacheEdge setting of 249856. This machine (my laptop) has a 256K L2 cache.

I no longer have access to MKL to compare against. Last time I did was here.

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