petsc-3.14.6 2021-03-30

PCGAMGSetCoarseEqLim

Set maximum number of equations on coarsest grid.

#include "petscpc.h" 
#include "petscksp.h" 
PetscErrorCode PCGAMGSetCoarseEqLim(PC pc, PetscInt n)

Collective on PC

	pc	- the preconditioner context
	n	- maximum number of equations to aim for

-pc_gamg_coarse_eq_limit <limit>

Notes: For example -pc_gamg_coarse_eq_limit 1000 will stop coarsening once the coarse grid has less than 1000 unknowns.

intermediate