Hello PETSc users community, Happy new year! Thank you for the community support as always.
I am using BoomerAMG for my research, and it is interfaced to my software via PETSc. I can only use options database keys as of now to tweak the settings I want for the AMG solve. I want to control the number of smoothener iterations at pre/post step for a given AMG cycle. I am looking for an options database key which helps me control this. I am not sure whether this is possible directly via the keys (Line 365: https://www.mcs.anl.gov/petsc/petsc-3.5.4/src/ksp/pc/impls/hypre/hypre.c.html). My comprehension of the current setup is that I have 1 smoothener iteration at every coarsening step. My aim is to do two pre and 2 post smoothening steps using the SSOR smoothener. BoomerAMG SOLVER PARAMETERS: Maximum number of cycles: 1 Stopping Tolerance: 0.000000e+00 Cycle type (1 = V, 2 = W, etc.): 1 Relaxation Parameters: Visiting Grid: down up coarse Number of sweeps: 1 1 1 Type 0=Jac, 3=hGS, 6=hSGS, 9=GE: 6 6 9 Point types, partial sweeps (1=C, -1=F): Pre-CG relaxation (down): 1 -1 Post-CG relaxation (up): -1 1 Coarsest grid: 0 PETSC settings I am using currently: -ksp_type preonly -pc_type hypre -pc_hypre_type boomeramg -pc_hypre_boomeramg_coarsen_type hmis -pc_hypre_boomeramg_relax_type_all symmetric-sor/jacobi -pc_hypre_boomeramg_strong_threshold 0.7 -pc_hypre_boomeramg_interp_type ext+i -pc_hypre_boomeramg_P_max 2 -pc_hypre_boomeramg_truncfactor 0.3 Thanks and Best Parv Khurana
