[Gmsh] Gmsh API + MPI

[David Colignon]

On 07/09/11 04:24, Vijay S. Mahadevan wrote:

> Hi Christophe,
>
> On a slightly related topic: where do you use PETSc specifically inside Gmsh ? I haven't looked at the sources in a
> while but was curious. I will configure the latest source based on PETSc soon to understand the details. Any
> help/pointers will be much appreciated.

Hi Vijay,

Gmsh uses Petsc i.e. for STL remeshing , see https://geuz.org/trac/gmsh/wiki/STLRemeshing

Regards,

Dave

-- 
David Colignon, Ph.D.
Collaborateur Logistique du F.R.S.-FNRS
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>
> Thanks,
> Vijay
>
> On Aug 23, 2011 7:08 AM, "Christophe Geuzaine" <cgeuzaine at ulg.ac.be <mailto:cgeuzaine at ulg.ac.be>> wrote:
>  >
>  > On 23 Aug 2011, at 09:47, Mikhail Artemiev wrote:
>  >
>  >> Hi all!
>  >> When I run the following easiest program:
>  >>
>  >> #include <mpi.h>
>  >> #include "Gmsh.h"
>  >> int main(int argc, char **argv)
>  >> {
>  >> MPI_Init(&argc, &argv);
>  >> GmshInitialize(argc, argv);
>  >> GmshFinalize();
>  >> MPI_Finalize();
>  >> return 0;
>  >> }
>  >>
>  >> I have the following error:
>  >>
>  >> [artemiev-desktop:19676] *** An error occurred in MPI_Init
>  >> [artemiev-desktop:19676] *** on communicator MPI_COMM_WORLD
>  >> [artemiev-desktop:19676] *** MPI_ERR_OTHER: known error not in list
>  >> [artemiev-desktop:19676] *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
>  >> --------------------------------------------------------------------------
>  >> mpirun has exited due to process rank 1 with PID 19676 on
>  >> node artemiev-desktop exiting without calling "finalize". This may
>  >> have caused other processes in the application to be
>  >> terminated by signals sent by mpirun (as reported here).
>  >> --------------------------------------------------------------------------
>  >> --------------------------------------------------------------------------
>  >> Calling MPI_Init or MPI_Init_thread twice is erroneous.
>  >> --------------------------------------------------------------------------
>  >> [artemiev-desktop:19674] 1 more process has sent help message help-mpi-errors.txt / mpi_errors_are_fatal
>  >> [artemiev-desktop:19674] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages
>  >>
>  >> I thought that "GmshInitialize" call "MPI_Init". Therefore I recompiled Gmsh with -DENABLE_MPI=0 option.
>  >> But the result was the same.
>  >>
>  >> Could you give a hint about how to use Gmsh API in parallel program?
>  >
>  > Hi Mikhail - MPI_Init might also be called (indirectly) in GmshInitialize if Gmsh is compiled with PETSc support. Is
> this the case in your setup?
>  >
>  >
>  >
>  >>
>  >> Thanks
>  >> Mikhail Artemiev
>  >> _______________________________________________
>  >> gmsh mailing list
>  >> gmsh at geuz.org <mailto:gmsh at geuz.org>
>  >> http://www.geuz.org/mailman/listinfo/gmsh
>  >
>  > --
>  > Prof. Christophe Geuzaine
>  > University of Liege, Electrical Engineering and Computer Science
>  > http://www.montefiore.ulg.ac.be/~geuzaine
>  >
>  >
>  >
>  >
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>
>
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