[petsc-users] ex52_integrateElement.cu

[Blaise Bourdin]

On Mar 27, 2012, at 1:23 PM, Matthew Knepley wrote:

> On Tue, Mar 27, 2012 at 12:58 PM, David Fuentes <fuentesdt at gmail.com> wrote:
> Hi, 
> 
> I had a question about the status of example 52.
> 
> http://petsc.cs.iit.edu/petsc/petsc-dev/file/a8e2f2c19319/src/snes/examples/tutorials/ex52.c
> http://petsc.cs.iit.edu/petsc/petsc-dev/file/a8e2f2c19319/src/snes/examples/tutorials/ex52_integrateElement.cu 
> 
> Can this example be used with a DM object created from an unstructured exodusII mesh, DMMeshCreateExodus, And the FEM assembly done on GPU ?
> 
> 1) I have pushed many more tests for it now. They can be run using the Python build system
> 
>   ./config/builder2.py check src/snes/examples/tutorials/ex52.c
> 
>   in fact, you can build any set of files this way.
> 
> 2) The Exodus creation has to be converted to DMComplex from DMMesh. That should not take me very long. Blaise maintains that
>      so maybe there will be help :) You will just replace DMComplexCreateBoxMesh() with DMComplexCreateExodus(). If you request
>      it, I will bump it up the list.

DMMeshCreateExodusNG is much more flexible than DMMeshCreateExodus in that it can read meshes with multiple element types and should have a much lower memory footprint. The code should be fairly easy to read. you can email me directly if you have specific questions. I had looked at creating a DMComplex and it did not look too difficult, as long as interpolation is not needed. I have plans to write DMComplexCreateExodus, but haven't had time too so far. Updating the Vec viewers and readers may be a bit more involved. In perfect world, one would write an EXODUS viewer following the lines of the VTK and HDF5 ones. 

Blaise


> 
> Let me know if you can run the tests.
> 
>   Thanks
> 
>      Matt
>  
> Thanks,
> David
> -- 
> What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
> -- Norbert Wiener

-- 
Department of Mathematics and Center for Computation & Technology
Louisiana State University, Baton Rouge, LA 70803, USA
Tel. +1 (225) 578 1612, Fax  +1 (225) 578 4276 http://www.math.lsu.edu/~bourdin







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