PCGAMGSetRepartition

Repartition the degrees of freedom across the processors on the coarser grids when reducing the number of MPI ranks to use

Synopsis

#include "petscpc.h" 
#include "petscksp.h" 
PetscErrorCode PCGAMGSetRepartition(PC pc, PetscBool n)

Collective

Input Parameters

• pc - the preconditioner context

• n - PETSC_TRUE or PETSC_FALSE

Options Database Key

• -pc_gamg_repartition <true,false> - turn on the repartitioning

Note

This will generally improve the loading balancing of the work on each level

See Also

KSP: Linear System Solvers, PCGAMG, PCGAMGSetProcEqLim(), PCGAMGSetRankReductionFactors()

Level

intermediate

Location

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

Implementations

PCGAMGSetRepartition_GAMG() in src/ksp/pc/impls/gamg/gamg.c

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