Yup, that's expected. That's because of your MPI implementation. OpenMPI
does a busy wait when waiting for mpi messages. I think there's an
environment variable or something that you can set to disable that, I am no
sure. Maybe someone on the mailing list knows, or try checking the OpenMPI
documentation.

Utkarsh

On Mon, Jun 15, 2009 at 11:28 AM, Randy Heiland <[email protected]> wrote:

> When I use 'mpirun -np 2 pvserver'  on my dual core MacBook (either
> connecting to it via paraview client or standalone), it keeps one of my CPUs
> pegged at nearly 100%.  Is this to be expected?  (Just running the serial
> './pvserver' of course just generates 'Listening...Waiting for client...'
> with no CPU load).
>
> % ./pvserver --version
> ParaView3.7
>
> % ompi_info
>                Open MPI: 1.3.1
>
> thanks, Randy
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