On Wed, Aug 13, 2008 at 2:57 PM, Johan Hoffman <jhoffman@xxxxxxxxxx
<mailto:jhoffman@xxxxxxxxxx>> 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?
