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Re: [Help-gsl] gsl vs. petsc

From: John Chludzinski
Subject: Re: [Help-gsl] gsl vs. petsc
Date: Wed, 9 May 2012 01:56:35 -0400

For smaller problems go with LAPACK/BLAS.  For large dense matrix problems
go with Elemental (Jack Poulson @ UTexas).  One caveat, Elemental as with
PETSc/SLEPc, is based on MPI and this relationship not transparent.  You
will need to understand MPI to effectively use Elemental and/or PETSc/SLEPc.


On Tue, May 8, 2012 at 7:58 PM, Gideon Simpson <address@hidden>wrote:

> While I've used petsc for some larger numerical linear algebra projects
> (typically on the order of 10000 degrees of freedom), I'd thought that
> smaller problems, with sizes of <= 100 degrees of freedom could be well
> handled by serial algorithms.  But petsc obviously has a much more
> extensive collection of solvers for sparse systems.  I was wondering, has
> anyone compared performance between the two libraries on smaller problems?
> -gideon

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