My program get stuck ... Bug ?

[Wei-keng Liao]

Hi, Adrien

Please let us know what version of PnetCDF you are using? Also, version of the MPI.
Your codes look fine to me (at least for the PnetCDF part).

If the problem only happened when the number of MPI processes is larger than the number of available cores, maybe it is caused by MPI-IO. Have you seen the same problem happened to a pure MPI-IO program?

A sample MPI-IO program can be found in
https://svn.mcs.anl.gov/repos/mpi/mpich2/trunk/src/mpi/romio/test/coll_perf.c


Wei-keng

On Apr 29, 2014, at 12:35 PM, BERCHET ADRIEN wrote:

> Hi there,
> 
> I am not sure it is the good place to ask this but I don't know where I can get help about it ...
> 
> I wrote a very little code to write NetCDF files using pnetcdf. Most of the time it work well and the netcdf file is properly generated (I checked with ncdump). But sometimes, the program just get stuck and runs indefinitely (it seems to happen only when the number of MPI processes is larger than the number of available cores but I am not sure about this). The program get stuck when it calls ncmpi_put_vara_double_all().
> 
> Could someone have a look on the code and tell me what is wrong please ? I looked for a solution for hours but could not find anything.
> 
> Thank you very much !
> 
> Adrien
> -- 
> Adrien Berchet
> 
> Institut P'
> Cnrs - Université de Poitiers - Ensma
> UPR 3346
> Département D2 : Fluides, Thermique, Combustion
> Axe Hydrodynamique et Écoulements Environnementaux
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> 
> Bureau : 165
> Mail : adrien.berchet at univ-poitiers.fr
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>  
> <pnetcdf_test.cpp>