[Numpy-discussion] Problems building NumPy with GotoBLAS

Sturla Molden sturla at molden.no
Wed Mar 23 07:25:53 EDT 2011

Den 22.03.2011 23:18, skrev Paul Anton Letnes:
> I'm no expert, but I just pulled off the scipy+numpy+GotoBLAS2 
> installation. From what I gather, the Makefile for libgoto2 downloads 
> and compiles the generic lapack from netlib. It also wraps lapack into 
> libgoto2.so/.a <http://libgoto2.so/.a>. I believe the idea is as long 
> as the BLAS implementation is fast(TM), the lapack performance will be 
> good.

GotoBLAS replaces a few LAPACK routines where BLAS optimization is not 
sufficient. Last time I built GotoBLAS2 it came with Netlib LAPACK 
sources in the tarball.

What really matters for LAPACK performance is not even BLAS, but the 
general matrix multiply routines *GEMM in BLAS. That is why AMD has made 
a GPU version of ACML where matrix multiplication in BLAS can be 
deferred to the ATI GPU.


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