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Re: Slow PetscInitialize?

 

On Monday, 15 October 2012, Anders Logg wrote:

> On Sun, Oct 14, 2012 at 06:33:55PM +0100, Garth N. Wells wrote:
>
> > > for external_pkg in umfpack hypre mumps scalapack blacs ptscotch
> > > scotch metis parmetis; do
> > >     CONFOPTS="${CONFOPTS} --download-${external_pkg}=1"
> > > done
> > >
> > > Any of these that should be avoided? Any that should be added for a
> > > better PETSc build?
> > >
> >
> > You also have MPI, to which PETSc will make calls. I haven't used the
> > Ubuntu OpenMPI package for a long time because I kept finding bugs in
> > it (and it doesn't support threads), so now I just build my own MPI
> > and don't bother with the MPI package.
>
> I've been trying various options today. I had trouble getting MPICH to
> compile on my machine and building OpenMPI gives the same result as
> the Ubuntu OpenMPI.
>
> I'm not 100% sure the Ubuntu OpenMPI is not being picked up. I removed
> it first but needed to install it again since the boost package
> depends on it. Do you use the package for boost or do you install that
> locally too?
>
>
 I have almost everything installed locally to avoid pulling in unwanted
versions of MPI, BLAS and LAPACK.

Garth



> --
> Anders
>
>
>

-- 
Garth N. Wells
Department of Engineering, University of Cambridge
http://www.eng.cam.ac.uk/~gnw20

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