On May 1, 2012, at 7:22 PM, Dave Nystrom wrote: > > >>> 2. Is anyone on this list sufficiently familiar with agmg and the other >>> PETSc mg solvers to know how to configure the PETSc mg solvers to work more >>> like agmg? It seems that agmg gives better performance than the PETSc mg >>> solvers but I also have issues with agmg including fragility. >> >> Please send a link for information on agmg; I've never heard of that. > > http://homepages.ulb.ac.be/~ynotay/AGMG
Ok, this general approach is what the Trilinos ML solver users (which is a fairly good) and what Mark Adams is adding to PETSc in PCGAMG. You can start by ./configure PETSc with --download-ml and then run the program with -pc_type mg You can run with -ksp_view to see the number of levels etc it ended up with and http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCML.html for some options. Barry > >> Barry >> >>> >>> Thanks, >>> >>> Dave