<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Thanks Utkarsh. Just to add to this thread, I asked some of the OMPI developers and apparently it's not possible to avoid this behavior.<div><br></div><div>-Randy</div><div><br><div><div>On Jun 15, 2009, at 11:35 AM, Utkarsh Ayachit wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">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.<br> <br>Utkarsh<br><br><div class="gmail_quote">On Mon, Jun 15, 2009 at 11:28 AM, Randy Heiland <span dir="ltr"><<a href="mailto:heiland@indiana.edu">heiland@indiana.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> 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).<br> <br> % ./pvserver --version<br> ParaView3.7<br> <br> % ompi_info<br> Open MPI: 1.3.1<br> <br> thanks, Randy<br> _______________________________________________<br> Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br> <br> Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br> <br> Please keep messages on-topic and check the ParaView Wiki at: <a href="http://paraview.org/Wiki/ParaView" target="_blank">http://paraview.org/Wiki/ParaView</a><br> <br> Follow this link to subscribe/unsubscribe:<br> <a href="http://www.paraview.org/mailman/listinfo/paraview" target="_blank">http://www.paraview.org/mailman/listinfo/paraview</a><br> </blockquote></div><br></blockquote></div><br></div></body></html>