dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Mon, Sep 14, 2009 at 01:01:43PM +0200, Anders Logg wrote:
> On Mon, Sep 14, 2009 at 05:47:34AM -0500, Matthew Knepley wrote:
> > On Mon, Sep 14, 2009 at 4:34 AM, Anders Logg <logg@xxxxxxxxx> wrote:
> >
> >     On Mon, Sep 14, 2009 at 11:19:58AM +0200, Garth N. Wells wrote:
> >     >
> >     >
> >     > Anders Logg wrote:
> >     > > On Mon, Sep 14, 2009 at 11:15:57AM +0200, Garth N. Wells wrote:
> >     > >>
> >     > >> Anders Logg wrote:
> >     > >>> Which is the preferred parallel direct solver? MUMPS or SPOOLES?
> >     > >>>
> >     > >> Probably depends on the system, but in my experiences MUMPS has been
> >     > >> better. However, the Debian/Ubuntu PETSc packages are configured with
> >     > >> SPOOLES, but not MUMPS.
> >     > >
> >     > > ok, I'm trying out MUMPS now.
> >     > >
> >     > > Harish: Perhaps --download-mumps=yes should be added to petsc.package
> >     > > in Dorsal?
> >     >
> >     > It requires a few more flags than just '--download-mumps=yes' as you'll
> >     > soon see ;).
> >
> >     Yes...
> >
> >     So far, I've added
> >
> >      --with-parmetis=1 --with-parmetis-dir=/usr/include/parmetis
> >     --download-mumps=1
> >
> >     But PETSc is complaining about ScaLAPACK. Is it possible to use the
> >     Debian package? I'm using OpenMPI (from Debian) but
> >     libscalapack-mpi-dev seems to require mpich.
> >
> >     Which is the simplest way to get MUMPS running?
> >
> >
> > --download-scalalpack --download-blacs --download-mumps
> >
> > It is really depressing that MUMPS is built on such as crappy package. However,
> > it is the
> > best parallel direct solver, and SPOOLES is not actively supported anymore.
> >
> > Also, you can only use the packages if you buy into whatever compiler/flag/
> > package combination
> > they happened to use. One reason we need the "crazy download stuff".
> >
> >    Matt
>
> Thanks, I'll try that.
>
> I'm very happy PETSc handles this (and Hypre) for me. In an ideal
> world, there would be decent Debian packages for all this.

Works fine. Here are the flags I ended up using:

 COPTFLAGS=-O3 --with-debugging=0 --with-clanguage=cxx --with-shared=1
 --download-hypre=1 --with-parmetis=1
 --with-parmetis-dir=/usr/include/parmetis --download-scalapack=1
 --download-blacs=1 --download-mumps=1

Thanks Matt.

--
Anders

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