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 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/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_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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