Hi Angus, On Sat, Dec 27, 2008 at 4:51 AM, Angus Hendrick <[email protected]> wrote: > Hello: > > Attached is a suggested revision to the fipy/tools/inline/__init__.py file. > The change creates another way to invoke inline using an environment > variable called FIPY_INLINE, which can be set to "true" or "false". I use > fipy in a multi-core environment to run parallel jobs using ipython. I > don't know how to control sys.argv on the different engines, but they can > all see the environment variables, so this works.
This is a good idea. It makes sense that command line arguments should also be set via the environment and this is mostly the case in fipy. I'll take a look at your changes and try and include them > Also, I have noted that the pysparse solvers can sometimes produce bad > results for diffusion problems with variable properties, but the trilinos > LinearGMRESSolver has been robust and about 2-4x as fast. My experience also. I also have even better results when I employ the Trilinos preconditioners. You might note that Dominique Orban is giving pysparse a good overhaul and some of the changes that are planned involve fixing the CGS solver for one thing. > Finally, for anyone else using Trilinos 9.0.1 with Python 2.5 (or later) in > a 64-bit machine where dl.so is not built, the first try clause in the > __init__.py file for PyTrilinos needs to have the two exceptions grouped > with parenthesis, as the two exceptions are not implicitly tupled. (I sent > this to the Trilinos folks too). Thanks for the note, I've just rewritten the trilinos installation instructions so I'll include this tidbit. You might also like to note that I recently rewrote a few of the trilinos multilevel preconditioner classes in fipy to correctly set the parameters for common preconditioner types as stated in the ML manual. <http://matforge.org/fipy/browser/branches/termMultiplication/fipy/solvers/trilinos/preconditioners/multilevelDDMLPreconditioner.py> <http://matforge.org/fipy/browser/branches/termMultiplication/fipy/solvers/trilinos/preconditioners/multilevelDDPreconditioner.py> <http://matforge.org/fipy/browser/branches/termMultiplication/fipy/solvers/trilinos/preconditioners/multilevelNSSAPreconditioner.py> <http://matforge.org/fipy/browser/branches/termMultiplication/fipy/solvers/trilinos/preconditioners/multilevelSAPreconditioner.py> Cheers -- Daniel Wheeler
