PCGAMGSetCoarseEqLim#
Set maximum number of equations on the coarsest grid of PCGAMG
Synopsis#
#include "petscpc.h" 
#include "petscksp.h" 
PetscErrorCode PCGAMGSetCoarseEqLim(PC pc, PetscInt n)
Collective
Input Parameters#
- pc - the preconditioner context 
- n - maximum number of equations to aim for 
Options Database Key#
- -pc_gamg_coarse_eq_limit - - set the limit
Note#
For example -pc_gamg_coarse_eq_limit 1000 will stop coarsening once the coarse grid has less than 1000 unknowns.
See Also#
the Users Manual section on PCGAMG, the Users Manual section on PCMG, KSP: Linear System Solvers, PCGAMG, PCGAMGSetProcEqLim(), PCGAMGSetRankReductionFactors(), PCGAMGSetRepartition(),
PCGAMGSetParallelCoarseGridSolve()
Level#
intermediate
Location#
Implementations#
PCGAMGSetCoarseEqLim_GAMG() in src/ksp/pc/impls/gamg/gamg.c
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