<div>I'm having a problem with GAMG causing a MatSetValues() is [some non-zero number] after</div><div><br></div><div>[0] PCSetUp(): Setting up new PC</div><div><br></div><div> I don't get this with either ILU or HYPRE/BoomerAMG. I've attached the output of -info. I see there is a recent change to some pre-allocation for GAMG here:</div>
<div><br></div><div><a href="http://petsc.cs.iit.edu/petsc/petsc-dev/rev/fe806009181b">http://petsc.cs.iit.edu/petsc/petsc-dev/rev/fe806009181b</a>
</div><div><br></div><div>I'm not sure if that has anything to do with it, but my blocksize is 1. I'm running with the following options.</div><div><br></div><div>-ksp_type bcgsl -pc_type gamg -pc_gamg_threshold 0.01 -mg_levels_ksp_type richardson -mg_levels_pc_type sor -mg_coarse_ksp_type richardson -mg_coarse_pc_type sor -mg_coarse_pc_sor_its 4 -pc_gamg_type agg <div>
-pc_gamg_agg_nsmooths 1 -pc_gamg_sym_graph true -info -ksp_monitor_true_residual</div></div><div><br></div><div>Thanks,</div><div>John</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><br>