[Paraview] Pvbatch not performing significantly better in parallel

[Massimiliano Leoni]

Sure, I have a pressure scalar field with a contour filter, a velocity vector 
field with a clip filter and an annotated time.

Do you want me to attach any file?


In data domenica 19 aprile 2015 10:30:47, Andy Bauer ha scritto:
> Can you share your full pipeline? Using the state file it's tough to see
> exactly what's going on.
> 
> You'll need to do your own build of ParaView and enable the spatio-temporal
> plugin if you want to use that.
> 
> 
> On Sun, Apr 19, 2015 at 5:58 AM, Massimiliano Leoni <
> 
> leoni.massimiliano1 at gmail.com> wrote:
> > Hi Andy,
> > 
> > thanks for your reply. I think my cells are being correctly partitioned. I
> > attach a screenshot of the grid when I color it by vtkProcessId.
> > 
> > The spatio-temporal parallelism could do the trick, but the nightly are
> > unavailable in this moment and I can't find the plugin in my current
> > installations. I'll try again later.
> > 
> > Anyway, I think I should get at least some benefit from pure spatial
> > parallelism, which instead I am not experiencing.
> > Is there any setting I might be missing?
> > 
> > Best regards,
> > Massimiliano
> > 
> > In data sabato 18 aprile 2015 10:52:10, Andy Bauer ha scritto:
> > > Hi Massimiliano,
> > > 
> > > I don't think the XML unstructured grid reader partitions the data so
> > > all
> > > of your cells are probably just ending up on process 0.
> > > 
> > > You may want to look at ParaView's spatio-temporal parallelism (
> > > http://www.paraview.org/Wiki/Spatio-Temporal_Parallelism). Make sure to
> > 
> > use
> > 
> > > a time compartment size of 1 if you're just using the XML unstructured
> > 
> > grid
> > 
> > > reader.
> > > 
> > > Regards,
> > > Andy
> > > 
> > > On Sat, Apr 18, 2015 at 6:40 AM, Massimiliano Leoni <
> > > 
> > > leoni.massimiliano1 at gmail.com> wrote:
> > > >  Hi everybody,
> > > > 
> > > > I am trying to run pvbatch in parallel to render an animation, with a
> > 
> > very
> > 
> > > > easy script that looks like
> > > > 
> > > >    - import sys
> > > >    - from paraview.simple import *
> > > >    -
> > > >    - # read pvsm file from command line and load it
> > > >    - stateFile = sys.argv[1]
> > > >    - simulation = stateFile.split("/")[-1].split(".")[0]
> > > >    - servermanager.LoadState(stateFile)
> > > >    -
> > > >    - # set active view and render animation
> > > >    - SetActiveView(GetRenderView())
> > > >    - WriteAnimation(simulation + ".jpg",magnification=2,quality=2)
> > > > 
> > > > I compiled paraview from sources, configuring with
> > > > 
> > > > cmake -DPARAVIEW_BUILD_QT=OFF -DCMAKE_BUILD_TYPE=Release
> > > > -DBUILD_TESTING=OFF -DPARAVIEW_ENABLE_PYTHON=ON -DPARAVIEW_USE_MPI=ON
> > 
> > ..
> > 
> > > > and then building all.
> > > > 
> > > > I am doing a benchmark on 11GB of data distributed over many pvd/vtu
> > 
> > files
> > 
> > > > [written by an MPI application in parallel].
> > > > 
> > > > I copied the data to a tmpfs folder to ensure the execution is not
> > 
> > slowed
> > 
> > > > down by disk access.
> > > > 
> > > > Executing pvbatch on 1 or 16 processors doesn't really seem to change
> > > > anything.
> > > > In particular, I was expecting to see the frames appearing in blocks
> > 
> > of 16
> > 
> > > > when running with mpi on 16 procs, but they always appear one at a
> > 
> > time at
> > 
> > > > a constant pace, which makes me suspect that the other processes
> > > > aren't
> > > > really contributing to the rendering.
> > > > 
> > > > 
> > > > 
> > > > What could I be doing wrong?
> > > > Any suggestion is highly appreciated.
> > > > 
> > > > Best regards,
> > > > 
> > > > Massimiliano
> > > > 
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