[Paraview] Experience with hanging OpenMPI

[Kevin H. Hobbs]

On 04/09/2010 02:44 PM, pat marion wrote:
> Hi, just thought I'd share this in case someone else runs into the same
> issue-
> 
> After upgrading my computer to dual quad-core intel xeons, and
> installing Ubuntu Karmic (9.10), pvserver with mpi would hang after a
> few renders.  It turns out it was this bug:
> 
> https://bugs.launchpad.net/ubuntu/+source/openmpi/+bug/504659
> https://svn.open-mpi.org/trac/ompi/ticket/2043
> 
> I removed the openmpi-bin and libopenmpi-dev packages and installed
> libmpich2-dev and mpich2.  Now everything is stable!
> 
> Pat
> 

You can work around this bug by increasing the number of fifos open mpi
uses. This avoids the race condition where all the fifos seem to be in
use. Add :

-mca btl_sm_num_fifos 16

to the mpirun command line.

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