[MPICH] VIsualization ???

[rppass at rppass.com]

Thanks you for your efforts.

SO I take it that if I start the two jobs (computation and visualization)
with the same mpiexec command, then I can publish names?

To try to work around this, I start the computation and have it print out
its port-name (looking like tag=0 port..........)  I then enter that
port-name into the visualization program and try to connect to that
explicit port name.  This does not connect.  So I have two problems!  The
first being the name lookup and then the second, if I get the port-name
from the name lookup, using it to connect (unless the format or structure
of the port-name from the name lookup is different than that returned by
MPI_OPEN_PORT command.

Ralph


> Hi,
>  MPICH2 on windows only supports the smpd process manager. I am currently
> looking into the code to find out the extend of support available in smpd
> process manager for publishing a name (You can publish names across MPI
> processes run using the same mpiexec command using smpd. MPD allows you to
> specify the machines in the MPD ring during mpdboot time and the published
> name is published to all the machines in the MPD ring.).
>
> (Note: There is a -sethosts option in smpd which could be of help. I will
> dig into the code and let you know soon.)
>
> Regards,
> Jayesh
>
> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov
> [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of rppass at rppass.com
> Sent: Tuesday, April 17, 2007 7:25 AM
> To: Trach-Minh Tran
> Cc: Ralph Pass; mpich-discuss at mcs.anl.gov
> Subject: Re: [MPICH] VIsualization ???
>
> Naive me, I just got MPICH2 from the MPICH2 web site at Argonne.
>
> I am running on Windows XP.
>
> How do I tell the version of MPICH2 that I got?
>
> Thank you,
> Ralph Pass
>
>
>> 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.
>>
>>
>
>
>
>