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[bug#49096] [PATCH] gnu: petsc: Link against OpenBLAS rather than LAPACK
From: |
Efraim Flashner |
Subject: |
[bug#49096] [PATCH] gnu: petsc: Link against OpenBLAS rather than LAPACK. |
Date: |
Mon, 21 Jun 2021 16:00:43 +0300 |
On Fri, Jun 18, 2021 at 06:12:04PM +0200, Ludovic Courtès wrote:
> From: Ludovic Courtès <ludovic.courtes@inria.fr>
>
> OpenBLAS performs better than LAPACK, the reference implementation.
> This is also consistent with the choice of BLAS/LAPACK implementations
> made in most other packages.
>
> * gnu/packages/maths.scm (petsc)[inputs]: Replace LAPACK by OPENBLAS.
> [arguments]: Pass "--with-openmp=1".
> ---
> gnu/packages/maths.scm | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> Hi!
>
> Usually there’s no reason to depend on the reference (“Netlib”) BLAS/LAPACK
> implementations because they perform poorly. This change is one way to
> bring consistency here.
>
> Thoughts?
>
> Ludo’.
It sounds reasonable to me.
As long as you're open to thoughts, perhaps we want to have a discussion
(in a new thread) about renaming the input labels for lapack/openblas so
it's easier to do 'guix build foo
--with-inputs=blas=openblas-tuned-for-my-machine'
>
> diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
> index a79d546abd..8d47f91310 100644
> --- a/gnu/packages/maths.scm
> +++ b/gnu/packages/maths.scm
> @@ -2417,7 +2417,7 @@ September 2004}")
> `(("python" ,python-2)))
> (inputs
> `(("gfortran" ,gfortran)
> - ("lapack" ,lapack)
> + ("openblas" ,openblas)
> ("superlu" ,superlu)
> ;; leaving out hdf5 and fftw, as petsc expects them to be built with
> mpi
> ;; leaving out opengl, as configuration seems to only be for mac
> @@ -2428,6 +2428,7 @@ September 2004}")
> #:configure-flags
> `("--with-mpi=0"
> "--with-openmp=1"
> + "--with-openblas=1"
> "--with-superlu=1")
> #:make-flags
> ;; Honor (parallel-job-count) for build. Do not use --with-make-np,
> --
> 2.32.0
>
>
>
>
--
Efraim Flashner <efraim@flashner.co.il> אפרים פלשנר
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