[Numpy-discussion] parallel numpy (by Brian Granger) - any info?
David Cournapeau
david at ar.media.kyoto-u.ac.jp
Tue Jan 8 10:42:48 EST 2008
Matthieu Brucher wrote:
>
> MKL does the multithreading on its own for level 3 BLAS
> instructions (OpenMP). For ACML, the problem is that AMD does
> not provide a CBLAS interface and is not interested in doing
> so. With ACML, the compilation fails with the current Numpy,
> but hopefully with Scons it will work, at least for the LAPACK
> part.
>
>
> [..]
>
> That is news to me. I compile NumPy with ACML regularly. I
> haven't tried with the current trunk but it worked recently. I
> have not tried the parallel versions, though.
>
>
> Could you share with us your setup.cfg and what you did to make Numpy
> work with ACML ? Last time I tried (one month ago), I had several
> unresolved externals (and I'm sure ACML does not provide the CBLAS
> interface which is needed by Numpy).
The CBLAS is not needed by numpy, only the fortran interface is [1]. But
some functions need the CBLAS interface to be optimized, like numpy.dot.
cheers,
David
[1] actually, no blas is needed for numpy, but to be usable with scipy,
you need one. I think, without being sure, that this is so such as numpy
can be built wo any fortran compiler.
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