[Gmsh] Gmsh API + MPI

[Vijay S. Mahadevan]

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.

Thanks,
Vijay
On Aug 23, 2011 7:08 AM, "Christophe Geuzaine" <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
>> 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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