[Paraview] Dual-headed output from a single GPU?

[Paul Melis]

Berk Geveci wrote:
> You shouldn't have to do anything special. I am not an OpenMPI expert
> so I can't speak to the MPI configurations. When you run pvserver with
> MPI, only the first node will listen to the server port. The others
> should wait for the first node in an MPI receive call. The fact that
> both servers are trying to listen to that port tells me that either
> ParaView is not compile with MPI or there is something wrong with the
> way you are using mpirun. To verify which one is the case, try mpirun
> -np 2 ./pvserver. If they are both trying to grab port 11111, ParaView
> is not compiled with MPI. Otherwise, something is wrong with the MPI
> line you are using.
>   
Ah, interesting detail :) 
I grabbed the precompiled version from paraview.org but now see that it
doesn't include MPI support. I'll build my own version and report back
here...

Thanks!
Paul
> Best,
> -berk
>
> On Mon, Oct 12, 2009 at 9:00 AM, Paul Melis <paul.melis at sara.nl> wrote:
>   
>> Hi,
>>
>> I'm trying to get paraview to handle rendering on a single GPU with
>> dual-monitor outputs. These outputs are run using different X screens on
>> the same X server. Using xinerama is not an option as this is a
>> preliminary test setup for driving a TPD using nodes that each drive 2
>> displays and the mullions can't be handled correctly with xinerama. The
>> goal is to run Paraview as described in
>> https://visualization.hpc.mil/wiki/Paraview_Tiled-Display_Mode.
>>
>> The problem I have is to get multiple pvservers to run on the same host.
>> I'm basically following the procedure outlined in "Multiple GPUs Per
>> Node" on http://www.itk.org/Wiki/Setting_up_a_ParaView_Server. The
>> -bynode mpirun line (supported by OpenMPI) works, but it leads to the
>> different pvserver processes trying to listen on port 11111:
>>
>> paulm at sara0143:/scratch/paulm/paraview-3.6.1-Linux-i686/bin$ mpirun
>> -bynode -np 1 ./pvserver -display :0.0 : -np 1 ./pvserver -display :0.1
>> Listen on port: 11111
>> Waiting for client...
>> Listen on port: 11111
>> ERROR: In
>> /home/kitware/ParaView-3.6/ParaView3/Servers/Common/vtkProcessModuleConnectionManager.cxx,
>> line 193
>> vtkProcessModuleConnectionManager (0x8216f60): Failed to set up server
>> socket.
>>
>> As far as I understand it this port (11111) is the "combined server"
>> port that the client connects to, but the connections among different
>> pvservers will use different (arbitrary) ports. So it seems two
>> pvservers want to play the role of combined server entry point in my
>> case. The mpirun line above is very similar to the one shown in the
>> Setting_up_a_ParaView_Server wiki page:
>>
>> mpirun -bynode -np 8 ./pvserver -display :0.0 : -np 8 ./pvserver
>> -display :0.1
>>
>> Is there some information missing on that page that is needed to get
>> this specific setup to work? I.e. something in an MPI hosts file?
>>
>> Thanks in advance,
>> Paul
>>
>>
>>
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