dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

Matthew Knepley wrote:
> On 8/27/07, Anders Logg <logg@xxxxxxxxx> wrote:
> > jesperc wrote:
> > > Hi,
> > 4. The first thing we need is to be able to communicate Mesh and
> > MeshFunction between processes. There is a sketch in
> > src/kernel/mesh/MPIMeshCommunicator.cpp (empty). One process reads the
> > mesh, partitions it and sends it to all processes. (To begin with, each
> > process will have a copy of the mesh.)
>
> I am attaching a preprint which details our current scheme for this.

Excellent, but the attachment seems to have gone missing.

/Anders


> > 5. The tricky part will be how to order degrees of freedom (class
> > DofMap). And this relates to ongoing work on merging the linear algebra
> > interfaces of DOLFIN and PyCC (Simula in-house code). We need to find
> > a design that works well for communicating both with PETSc and Epetra
> > (Trilinos).
>
> You can see how we are doing it in PETSc by looking at src/dm/mesh/sieve/Mesh.hh
> in setupField(). However, this is still not completely correct since
> it does not handle
> vector elements correctly. I am fixing this now.
>
>   Thanks,
>
>     Matt
>
> > I'm sure Garth and Martin will have further opinions.
> >
> > /Anders
> >
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