[Dune] example for mpicollectivecommunication

[Tobias Malkmus]

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Hi Aleksejs

You can use the Dune::CollectiveCommunication from
dune-common/dune/common/parallel/mpicollectivecommunication.hh.
It contains a method called sum, which does what you need.

Of cousre you will have to initialize the MPI communicator using:

MPIHelper::instance( argc, argv )

from dune-common/dune/common/parallel/mpihelper.hh at the beginning of
your main routine.

Don't forget to configure dune with parallel support(
- --enable-parallel, MPICC=/.../mpicc )


Best Tobias

On 10/01/2014 11:00 AM, Aleksejs Fomins wrote:
> Dear Dune,
> 
> I would like to sum up a variable over all processes.
> 
> Could you suggest an example program I can take inspiration from?
> 
> Thank you, Aleksejs
> 
> 
> 
> _______________________________________________ Dune mailing list 
> Dune at dune-project.org 
> http://lists.dune-project.org/mailman/listinfo/dune
> 


- -- 
Tobias Malkmus                 <tomalk at mathematik.uni-freiburg.de>

Mathematisches Institut               Tel: +49 761 203 5627
Abt. für Angewandte Mathematik        Universität Freiburg
Hermann-Herder-Str. 10
79104 Freiburg

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