[Numpy-discussion] MKL and OpenBLAS
sturla.molden at gmail.com
Fri Feb 7 07:44:46 EST 2014
Thomas Unterthiner <thomas_unterthiner at web.de> wrote:
> Sorry for going a bit off-topic, but: do you have any links to the
> benchmarks? I googled around, but I haven't found anything. FWIW, on my
> own machines OpenBLAS is on par with MKL (on an i5 laptop and an older
> Xeon server) and actually slightly faster than ACML (on an FX8150) for
> my use cases (I mainly tested DGEMM/SGEMM, and a few LAPACK calls). So
> your claim is very surprising for me.
I was thinking about the benchmarks on Eigen's website, but it might be a
bit old now and possibly biased:
It uses a single thread only, but for smaller matrix sizes Eigen tends to
be the better.
Carl Kleffner alerted me to this benchmark today:
It shows superb performance and unparallelled scalability for OpenBLAS on
Opteron. MKL might be better on Intel CPUs though. ATLAS is doing quite
well too, better than I would expect, and generally better than Eigen. It
is also interesting that ACML is crap, except with a single-threaded BLAS.
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