[petsc-dev] Tests for DMGetInterpolation_DA_XXX_Q1

Barry Smith bsmith at mcs.anl.gov
Sun Dec 12 16:52:56 CST 2010

On Dec 1, 2010, at 8:00 AM, Dave May wrote:

> Hi Barry,
>  I have updated the DMGetInterpolation_DA_XXX_Q1() family of
> functions to enable them to
> work with DMDA's which are nested, but have general coordinates
> defined by the user.
> The original used code which would compare two floating point numbers
> with "==" and in general it
> would seg fault with 1) non-regular coordinates and 2) even with
> uniform coordinates with non constant dx,dy.dz.
> I have confirmed that the modified GetInterpolation() routines produce
> second order interpolants, but before
> pushing anything (using Jed as my proxy) I wanted to test the routines
> with some galerkin multigrid examples / tests.
> Grepping the source code I could not find any tests which use the flag
> -pc_mg_galerkin.
> Can someone advise which tests actually test the functionality of the
> interpolants constructed
> from DMGetInterpolation_DA_XXX_Q1()?

  Unlikely to be such tests, just push the stuff and let the chips fall where they May.


> Cheers,
>  Dave

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