On Wed, Aug 13, 2008 at 03:09:48PM +0100, Garth N. Wells wrote: > > > Ola Skavhaug wrote: > > > > > > On Wed, Aug 13, 2008 at 2:57 PM, Johan Hoffman <[EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED]>> wrote: > > > > > > > > > > > Johan Hoffman wrote: > > >>> > > >>> Anders Logg wrote: > > >>>> On Tue, Jun 17, 2008 at 02:45:41PM +0100, Garth N. Wells wrote: > > >>>>> It would be useful to lay out a plan for tackling DofMaps. > > Getting > > >>>>> this > > >>>>> right is the key to parallel assembly, assembly optimisations and > > >>>>> applying Dirichlet boundary conditions by eliminating > > Dirichlet dofs > > >>>>> from the global system. > > >>>>> > > >>>>> I'm happy to take a look, but I'll need some time because > > I've lost > > >>>>> my > > >>>>> overview of DofMaps. If someone else is already on top of it, > > I'd be > > >>>>> happy to provide feedback. > > >>>>> > > >>>>> Garth > > >>>> I won't have time to look at it until after the summer and I > > haven't > > >>>> started. > > >>>> > > >>>> Anyway, I think we should wait until after the next release > > until we > > >>>> start messing with the dof maps. > > >>>> > > >>>> Are there any issues we need to sort out before releasing 0.8? I'm > > >>>> thinking about a new release some time this or next week. > > >>>> > > >>>> One is to fix the bug in DirichletBC, but other than that? > > >>>> > > >>> Now would be a good time for a release so I can start messing with > > >>> DofMaps. > > >>> > > >>> Garth > > >> > > >> Has anything more been done about the DofMap design? During the > > summer > > >> Niclas has extended to general elements his adaptive algorithm for > > >> distributed parallel computing, so we are now ready to start messing > > >> with > > >> the DofMaps in order to implement his algorithm in DOLFIN. > > >> > > > > > > It has been given some thought, but no changes have been made in the > > > code yet. > > > > Ok. Any threads on the list to point to where this is discussed? > > > > If you have something already, I would suggest making it > > > publicly available somewhere for feedback before starting work on > > DOLFIN. > > > > It is a refinement and generalization of the thesis work of Niclas > > Jansson > > which was discussed on the list before the summer. Is is outlined in his > > report: > > > > http://www.nada.kth.se/utbildning/grukth/exjobb/rapportlistor/2008/rapporter08/jansson_niclas_08051.pdf > > > > My announcement here was to initiate a discussion of the detailed > > implementation, and to check if other DOLFIN-people were working on > > similar stuff to avoid double/conflicting development. > > > > /Johan > > > > > > Very good. We were about to start on this task, so now a good point in > > time to join forces. > > As a starting point, it would be nice to agreeing on what data is needed > > in addition to the partitioned meshes to construct the global dofmap. > > I.e. which MeshFunctions to construct during the mesh paritioning > > process. Are you people using the same {T,S,F} input as Anders describes > > in Algorithm 5 in his paper? > > > > Which paper?
This one: http://home.simula.no/~logg/pub/papers/submitted-Log2008a.pdf -- Anders
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