[petsc-users] [SOLVED] make test freeze

[Patrick Begou]

Hi Matthew,

Using the debuguer I finaly found the problem. It is related to MPI. In 
src/sys/objects/pinit.c line 779, petsc test the availability of 
PETSC_HAVE_MPI_INIT_THREAD and this is set to True beccause my OpenMPI version 
is compiled with  --enable-mpi-thread-multiple.
However the call to MPI_Init_thread(argc,args,MPI_THREAD_FUNNELED,&provided) 
hangs and freeze the application.

Unsetting PETSC_HAVE_MPI_INIT_THREAD in petsc solves the problem.

I remember a HPC seminar on BULLX systems where they give us some informations 
about known problems whith the MPI_Init_thread call in openMPI. May be I should 
use a more recent version of OpenMPI. This also explain why I had this problem 
with previous versions of petsc (same OpenMPI environment).
None of our codes mixes OpenMP and MPI.... so I never fall in this situation in 
production and petsc always behave fine (excepted for make test).

Is there a way to turn off PETSC_HAVE_MPI_INIT_THREAD at configure time for 
Petsc ? I've manualy removed it in the generated petscconf.h file before 
compiling Petsc in debug mode but I don't think it is the best way to to this.....

Thanks for your help in running separatly the test codes.

Patrick

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