[petsc-users] Hypre + openMP

[Jed Brown]

Michele Rosso <mrosso at uci.edu> writes:

> Thanks Matt,
> Could you give me an example of not-native partitioning? I have a cubic
> domain and a 3D domain decomposition. I use dmda3d to create the
> partitioning.

Are you talking about geometric multigrid (AMG coursening is typically
irregular)?  Anyway, this is just math: what does it mean to have less
than one degree of freedom on a level?  Geometric MG on DMDA does have
requirements, but if you're using Hypre, I don't see why you'd care
about that.
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