[MPICH] VIsualization ???

[Trach-Minh Tran]

On 04/13/2007 09:26 PM, Ralph Pass wrote:
> I am trying to get a separate process (visualizer) to connect to a
> server for computation of results to be visualized).  I am tyring to
> emulate the code in Using MPI-2 (I downloaded the version yesterday).
> 
> I try to publish the name of the computation program and then accept a
> comm.
> 
> On the visualizer side I try to lookup the name.
> 
> I am using C++ on a Windows XP system.
> 
> I run the computation program (using mpiexec to start it) and it is fat
> and dumb, awaiting a connection  and then a data transfer.
> On the visualization side, when I try the lookup call [looks like: 
> MPI_Lookup_name("ImageProcessing", MPI_INFO_NULL, mMPIPortName);]
> 
> I get an error return: 536999969.  When I convert this to a string, I get:
> 
> Error message Invalid service name (see MPI_Publish_name), error stack:
> MPID_NS_Lookup(70): Lookup failed for service name ImageProcessing
> 
> 
> 
> I start the computation with mpiexec -n 4 processing
> 
> 
> and the visualizer with
> 
> mpiexec -localonly 1 visualizer
> 
> Any help or comments? (Like you need to start the two programs in the
> same mpiexec command)
> 

Which mpiexec did you use? The publish_name/lookup_name does not
work with the OSC's mpiexec. However with the MPICH2 MPD version,
it does. After setting up the MPD with "mpdboot ...", I just run

mpiexec -n 1 ./viz < /dev/null &
mpiexec -n 4 ./comp

Hope this help.

-Minh.