[petsc-users] Problem running percé

[Matthew Knepley]

On Wed, Sep 4, 2019 at 8:07 PM Konstantinos Kontzialis via petsc-users <
petsc-users at mcs.anl.gov> wrote:

> Hi all,
>
> I try to run my code with petsc on Fedora. It’s a parallel CFD code and I
> write on a command line the following:
>
> mpirun -np 4 ./executable input-file
>
> but when I do that I get my code run serially but four different processes
> and not in parallel. I use MPI_Comm_rank after petscinitialize and I get 0
> for every process.
>
> Why is this happening?
>

It is likely that 'mpirun' in the your path does not match the MPI you
built PETSc with.

  Thanks,

     Matt


> Kostas



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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