Thanks Jed, That'll most likely do what I'm looking for.
John On Tue, Mar 31, 2015 at 3:47 PM, Jed Brown <[email protected]> wrote: > John Mousel <[email protected]> writes: > > > If I recall correctly, GAMG has a somewhat high setup cost and this is a > > solver I'll only be using for one single solve. It's not a physical > field, > > it's just a marker; 1 inside, 0 outside a surface described by a CAD > file. > > This marker is being propagated into the volume of an octree volumetric > > grid. I'm just taking advantage of the fact that the solution of the > > Laplace equation with constant BC's is the constant. > > Oh, I see. Enforce your boundary conditions so that the problems on > each side decouple, then use -pc_gamg_agg_nsmooths 0 (unsmoothed > aggregation). Profile and let us know if it's a bottleneck. >
