PCGAMGSetAggressiveLevels

Use aggressive coarsening on first n levels

Synopsis

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

Logically Collective

Input Parameters

• pc - the preconditioner context

• n - 0, 1 or more

Options Database Key

• -pc_gamg_aggressive_coarsening <n,default = 1> - Number of levels to square the graph on before aggregating it

See Also

KSP: Linear System Solvers, PCGAMG, PCGAMGSetThreshold(), PCGAMGMISkSetAggressive(), PCGAMGSetAggressiveSquareGraph(), PCGAMGMISkSetMinDegreeOrdering()

Level

intermediate

Location

src/ksp/pc/impls/gamg/agg.c

Implementations

PCGAMGSetAggressiveLevels_AGG() in src/ksp/pc/impls/gamg/agg.c

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