Volume rendering only with one core
 

Dear all,

I have a problem with paraview (binaries 3.12).
If I set "use multicore" in the settings everything speed up but if I want to make a volume rendering I get the following error:
If I just use one core (without "use multi core") its working.

Can I shor-ty@cfd:/media/SERVER/benchmark$ paraview paraview.foam
AutoMPI: SUCCESS: command is:
"/home/shor-ty/OpenFOAM/ParaView-3.12.0-Linux-x86_64/lib/paraview-3.12/mpiexec" "-np" "8" "/home/shor-ty/OpenFOAM/ParaView-3.12.0-Linux-x86_64/lib/paraview-3.12/pvserver" "--server-port=39983"
AutoMPI: starting process server
-------------- server output --------------
Waiting for client
AutoMPI: server sucessfully started.
ERROR: In /home/kitware/Dashboards/MyTests/ParaView-master/VTK/Parallel/vtkSocketCommunicator.cxx, line 766
vtkSocketCommunicator (0x301ff00): Could not receive tag. 23490


ERROR: In /home/kitware/Dashboards/MyTests/ParaView-master/VTK/Parallel/vtkSocketCommunicator.cxx, line 766
vtkSocketCommunicator (0x301ff00): Could not receive tag. 23491


ERROR: In /home/kitware/Dashboards/MyTests/ParaView-master/VTK/Parallel/vtkSocketCommunicator.cxx, line 766
vtkSocketCommunicator (0x301ff00): Could not receive tag. 23492
[code]

Does anyone know why this error occur and how I can solve it ? :)

Thanks in advance tobi

Hi Tobi,

I think there is something strange with your command... it should be something like:
not:
I've done some tests on my machine at home and it was crawling either way (1 core vs 5 cores), for volume rendering with OpenFOAM's cavity tutorial. I even tried the tutorial mentioned here: http://paraview.org/Wiki/Volume_rendering_-_Fire

• The example file is present inside the Data package provided here: http://www.paraview.org/paraview/resources/software.php
• After unpacking, it's located at "Data/disk_out_ref.ex2".

My machine has got an integrated Radeon HD 3200, so it's not a very powerful GPU, but the cavity tutorial only has got 400 cells... so something strange is going on here. But then again, I can't remember once that I managed to use volume rendering.


I did some more tests with "LIBGL_ALWAYS_INDIRECT", as explained here: http://www.cfd-online.com/Forums/ope...tml#post279104 - but it made the display unresponsive, since it seemed to have changed the rendering priorities, therefore ignoring the user-side of rendering :(

I did a bit of searching and found this thread: http://www.cfd-online.com/Forums/ope...-paraview.html - Petr seems to still have the same/similar problem, even after 1 year of trial and error.

Best regards,
Bruno

----------------------

edit: A bit more searching and I found this: http://www.cmake.org/Wiki/index.php?...ee_my_data_.3F
Which seems to indicate that parallel volume rendering only works for image data, such as this: http://www.youtube.com/watch?v=UwKFg0yOlCA


edit 2: Try using the example file group "Data/FileSeries/wavelet_..vti" present in ParaView's data package. This did a really fast volume render, as shown in attachment.
Also try "Data/iron_protein.vtk", as shown in the second image.