Thank you, "mpirun -n 2 pvbatch --mpi --symmetric test.py" runs as expected.
But I am now using pure python with properly set library paths. It's a bit annoying that these pvbatch traps aren't documented in the vtkMPIController class reference or in http://www.paraview.org/ParaView3/Doc/Nightly/www/py-doc/. What other surprises are to be expected when I use pvbatch?? Thank you! Ephraim 2017-05-16 21:22 GMT+02:00 David E DeMarle <dave.dema...@kitware.com>: > Run with --symmetric. > > Without it, only root node reads the script and it tells the rest of the > nodes what to do via paraview's proxy mechanisms (which take effect only > for vtkSMProxy and subclasses). > With it, every node reads and executes the script and all nodes do their > own parts behind the proxies. > > > > 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 3:14 PM, Ephraim Obermaier < > ephraimoberma...@gmail.com> wrote: > >> 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/bu >>>> ild/ParaView/5.3.0/foss-2016b-mpi/ParaView-v5.3.0/VTK/Parall >>>> el/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/bu >>>> ild/ParaView/5.3.0/foss-2016b-mpi/ParaView-v5.3.0/VTK/Parall >>>> el/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_-5463582805380536858_m_880591844498205545_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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