Thank you all for suggesting "pvbatch --mpi". At least, this returns size=2 processes, but the updated test.py (below) hangs with the following output:
$ mpirun -n 2 pvbatch --mpi test.py comm: <type 'vtkParallelMPIPython.vtkMPIController'> rank: 0 size: 2 Process 0 Why is "Process 1" not printed, and why does the program hang instead of finishing? The file test.py was simplified to: import vtk c = vtk.vtkMultiProcessController.GetGlobalController() print "comm:",type(c) rank = c.GetLocalProcessId() print "rank:",rank size = c.GetNumberOfProcesses() print "size:",size if rank == 0: print "Process 0" else: print "Process 1" c.Finalize() Thank you! Ephraim 2017-05-16 19:11 GMT+02:00 David E DeMarle <dave.dema...@kitware.com>: > Try your script within pvbatch. > > pvpython is analogous to the Qt client application, it (usually) is not > part of an MPI execution environment. Either one can connect to an MPI > parallel pvserver. > pvbatch is a python interface that is meant to be run on the server. It is > directly connected to the pvserver. > > > > > > > David E DeMarle > Kitware, Inc. > Principal Engineer > 21 Corporate Drive > Clifton Park, NY 12065-8662 > Phone: 518-881-4909 <(518)%20881-4909> > > On Tue, May 16, 2017 at 1:07 PM, Ephraim Obermaier < > ephraimoberma...@gmail.com> wrote: > >> Hello, >> I am trying to use VTK's MPI communication from pvpython, running with >> OpenMPI's mpirun. It seems like ParaView hasn't enabled the MPI >> capabilities for VTK, although it was compiled from source with >> PARAVIEW_USE_MPI=ON and correctly found the system OpenMPI-2.0.0 libraries >> and includes. >> >> I am running the short example below with the command "mpirun -n 2 >> pvpython test.py". The full output is also attached. >> In short, both MPI processes report rank=0 and size=1 and their >> controller is a vtkDummyController although I expected rank=0..1, size=2 >> and a vtkMPIController. >> >> Is it possible to determine the problem with the given information? Do I >> need extra CMake settings besides "PARAVIEW_USE_MPI=ON" to enable MPI for >> VTK? >> ParaView by itself runs fine in parallel, and I can start several >> parallel pvservers using "mpirun -n 16 pvserver". >> >> --- test.py: --- >> import vtk >> >> c = vtk.vtkMultiProcessController.GetGlobalController() >> >> print "comm:",type(c) >> rank = c.GetLocalProcessId() >> print "rank:",rank >> size = c.GetNumberOfProcesses() >> print "size:",size >> >> if rank == 0: >> ssource = vtk.vtkSphereSource() >> ssource.Update() >> print " 0 sending." >> c.Send(ssource.GetOutput(), 1, 1234) >> else: >> sphere = vtk.vtkPolyData() >> print " 1 receiving." >> c.Receive(sphere, 0, 1234) >> print sphere >> >> --- Test run: --- >> $ mpirun -n 2 pvpython test.py >> comm: <type 'vtkParallelCorePython.vtkDummyController'> >> rank: 0 >> size: 1 >> 0 sending. >> Warning: In /home/user/.local/easybuild/build/ParaView/5.3.0/foss-2016b- >> mpi/ParaView-v5.3.0/VTK/Parallel/Core/vtkDummyCommunicator.h, line 47 >> vtkDummyCommunicator (0x1ff74e0): There is no one to send to. >> [... 7 more times the same Warning...] >> >> comm: <type 'vtkParallelCorePython.vtkDummyController'> >> rank: 0 >> size: 1 >> 0 sending. >> Warning: In /home/user/.local/easybuild/build/ParaView/5.3.0/foss-2016b- >> mpi/ParaView-v5.3.0/VTK/Parallel/Core/vtkDummyCommunicator.h, line 47 >> vtkDummyCommunicator (0x22c14e0): There is no one to send to. >> [... 7 more times the same Warning...] >> --- end of output --- >> >> Thank you! >> Ephraim >> >> >> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >> Virenfrei. >> www.avast.com >> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >> <#m_2985275498583997113_m_7351775176557461903_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >> >> _______________________________________________ >> Powered by www.kitware.com >> >> Visit other Kitware open-source projects at >> http://www.kitware.com/opensource/opensource.html >> >> Please keep messages on-topic and check the ParaView Wiki at: >> http://paraview.org/Wiki/ParaView >> >> Search the list archives at: http://markmail.org/search/?q=ParaView >> >> Follow this link to subscribe/unsubscribe: >> http://public.kitware.com/mailman/listinfo/paraview >> >> >
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