Hmmm. It certainly should not be much slower. Even in the worst load balancing case, it should be at most slightly slower. I will take a look.
-berk On Mon, Apr 21, 2014 at 6:20 PM, Amir A <[email protected]> wrote: > Hi Berk: > > Thank you for your reply. I am doing the visualization on a distributed > cluster. And the StreamTracer filter is used with a point source of radius > 0.1 and 100 seeds. > > It is surprising that the streamtracer in parallel takes orders of > magnitude more time than when applied in serial. I tried to first apply D3 > filter and then the streamtracer. That helps a little bit but still the > time is prohibitively long (about an hour compared to ~5min when done in > serial). I do not know if I am missing something or this is usual. > > Here is the visualization that I want to create in parallel (I had to do > it in serial because of this problem): > https://www.dropbox.com/s/r3kkon3khjdpqs6/foam_3.png > > The original dataset is about 4GB. Here is a smaller one (~1GB) with the > state files: > https://www.dropbox.com/s/r6lh3sx2wojfva2/sample.tar.gz > > I would highly appreciate any suggestions. > -Amir > > ------------------------------ > From: [email protected] > Date: Mon, 21 Apr 2014 11:34:25 -0400 > To: [email protected] > CC: [email protected] > Subject: Re: [Paraview] Fwd: Stream Tracer Scaling > > > Actually, if the integration is fairly load balanced across partitions, > the streamline integration can scale OK. It is highly dependent on how the > seeds are distributed and if the integration ends up clustering on a few > processes. Amir: > > - How big is your seed source? Does it span multiple partitions? How many > seed points? > - Do the streamlines stay together or do the move around the domain more > independently? > > Are you running on a single machine by the way? I have been thinking > about parallelizing the streamline filter over threads, which should scale > better on a single machine. > > Best, > -berk > > > _______________________________________________ Powered by > www.kitware.comVisit 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/ParaViewFollow this link to subscribe/unsubscribe: > http://www.paraview.org/mailman/listinfo/paraview >
_______________________________________________ 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 Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
