dolfin team mailing list archive

["Johan Hoffman" <jhoffman@xxxxxxxxxx>]

>
>
> 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

>
> Garth
>
>
>> I see Anders report referenced in the code, where the mapping scheme
>> described is fairly close to what Niclas has implemented, although there
>> are some differences. We will sit down today to sum up what we think
>> needs
>> to be done, and then we can discuss this on the mailing list.
>>
>> /Johan
>>
>>
>>
>>
>>
>>
>>
>>
>
>
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