[petsc-dev] KSP automatic reordering

[Barry Smith]

On Sep 18, 2012, at 9:02 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Tue, Sep 18, 2012 at 8:58 PM, Matthew Knepley <knepley at gmail.com> wrote:
> Of course, I forgot EVERYTHING goes in the DM. Once the DM computes the ordering, the
> DMLocalToGlobal is altered and we are done.
> 
> If they had a DM, we wouldn't be having this conversation. 50% of the reason for this utility is to make the Matrix Market benchmark results more realistic.

   I propose we provide a new interface

         KSPSolveMatrixMarket(filename) that purportedly  reads in a matrix market matrix and solves it but in fact just returns a (small) time linearly proportional to the size of the file. Saves everyone a lot of wasted effort.

   Barry