Multithreaded Multiplication of Large Non-sparse, Non-square Matrices in C/C++

Question

All,

I'm looking for recommendations for C or C++ libraries (preferably open source) that use multi-threaded techniques to multiply large, non-square, (e.g. 65536xn in size where n < 65536) non-sparse matrices. Thanks.

-&&

Answer 1

Intel MKL (not open source)

AMD ACML (free, but not open source)

GOTO BLAS (free for academic use, IIRC, and you get the source, but not "open source")

ATLAS BLAS (open source)

Answer 2

The Intel Software folks seem to have a good discussion on the subject.