[Numpy-discussion] Use OpenBLAS for the binary releases?
sturla at molden.no
Mon Nov 19 13:27:38 EST 2012
On 19.11.2012 18:42, Dag Sverre Seljebotn wrote:
> Even on CPUs that are not directly supported, this is at least better
> than reference BLAS.
> (On our AMD CPUs, which are too new to have a separate OpenBLAS
> implementation, the implementations for older AMD CPUs still outperform
> at least Intel MKL, because MKL does so poorly on these -- although ACML
> beats them both by a factor 2. And of course on supported CPUs
> (everything Intel and older AMD) OpenBLAS is wonderful.
I have a laptop with a quadcore AMD Phenom II, but ACML consistently
segfaults when used with MinGW (gcc or gfortran).
With another set of compilers (Microsoft C and Absoft Fortran), ACML
usually works, but sometimes decides my CPU is not supported, and just
terminates the process.
I'm not sure NumPy even builds against ACML, e.g. it has a non-standard
C interface for BLAS and LAPACK. Also, it wouldn't work with GNU
compilers on Windows. Dependency on Intel or PGI run-time DLLs would
also make it useless for the binary superpacks.
OTOH, OpenBLAS works wonderfully :)
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