Re: MPI Initialisation Problem

[Satish Balay <balay@xxxxxxxxxxx>]

On Sat, 16 Jun 2007, Tim Stitt wrote:

> Hi all,
> 
> I am having some difficulty getting my parallel eigensolver to run over 
> multiple processes.
> 
> When I execute my parallel code on my distributed-memory machine ( with > 1 
> processes) I keep getting the following runtime message:
> 
> mpiexec: Warning: task 0 exited before completing MPI startup.
> mpiexec: Warning: task 1 exited oddly---report bug: status 0 done 0.
> 
> MPI_Comm_Size returns 1 for #processes even though I mpiexec -n 2 or higher.
> 
> The code still runs to completion but serially.......

can you reproduce this problem with a PETSc example? If so, send us
the complete log of your build [configure.log, make_log_PETSC_ARCH]
and the log for test examples [test_log_PETSC_ARCH] to
petsc-maint@xxxxxxxxxxx

Satish
> 
> I have taken the same code and ran it on my shared-memory machine with no 
> problems and all processes getting picked up so I know it is not a coding 
> problem.....the sample ksp test codes that come with my petsc (2.3.3) 
> distribution also exhibit this problem.
> 
> So there seems to be a problem with the PETScInitialize routine with this 
> particular architecture. I have tried both pathscale and pgi compilers with 
> the same result. As far as I can see there are no noticeable warnings 
> generated during the config and make phases. Others use MPI regularly on our 
> cluster so I don't see how it could be a MPI library issue.
> 
> Any thoughts on what could be happening gratefully received.
> 
> Regards,
> 
> Tim.
> 
>