[petsc-dev] petsc-dev fails test with debugging=0

Jed Brown jed at jedbrown.org
Sun Jan 19 16:06:56 CST 2014

Andrea Lani <andrea.lani at gmail.com> writes:

> I want to use KSPGMRES

With what inside?  Jacobi?

Your outer solve was GMRES, which requires a linear preconditioner.
That implies fully converging the subdomain solver when using an
iterative method.  This is likely to be inefficient, in which case you'd
probably want to switch to FGMRES or GCR for the outer KSP.

I don't know how difficult it will be to make BJacobi support GPUs.
Could be easy, but someone has to write the code.  Karl or Dominic, have
you looked at this?
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