I see that ASM has a DM and can get subdomains from it. I have a DMForest and I would like an ASM that has a subdomain for each field. How might I go about doing this? (the fields are not coupled in the matrix so this would give a block diagonal matrix, and thus exact with LU sub solvers.
I am then going to want to get these separate solves to be run in parallel on a GPU (I'm talking with Sherry about getting SuperLU working on these small problems). In looking at PCApply_ASM it looks like this will take some thought. KSPSolve would need to be non-blocking, etc., or a new apply op might be needed. Thanks, Mark
