> On Tue, Dec 20, 2011 at 19:35, Max Rudolph <rudolph at berkeley.edu> wrote:
> When I run my code with the -log_summary option, it hangs indefinitely after
> displaying:
>
> ========================================================================================================================
> Average time to get PetscTime(): 9.53674e-08
> Average time for MPI_Barrier(): 0.00164938
>
> Is this a common problem, and if so, how do I fix it? This does not happen
> when I run the example programs - only my own code, so I must be at fault but
> without an error message I am not sure where to start. I am using
> petsc-3.1-p7. Thanks for your help.
>
> Are all processes calling PetscFinalize()?
>
> How did you set -log_summary? It should be provided at the time you invoke
> PetscInitialize() on all processes.
>
> Try running in a debugger, then break when it hangs and print the stack trace.
I found the problem, or at least a workaround. I have a PetscRandom and freed
it in the second to last line of my main subroutine:
...
ierr= PetscRandomCreate(PETSC_COMM_WORLD, &r);CHKERRQ(ierr);
ierr = PetscRandomSetType(r,PETSCRAND48);CHKERRQ(ierr);
...
ierr = PetscRandomDestroy( r );CHKERRQ(ierr);
ierr = PetscFinalize();
}
If I comment out the line with PetscRandomDestroy, -log_summary seems to work.
Max
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