PCGAMGSetProcEqLim#

Set number of equations to aim for per process on the coarse grids via processor reduction in PCGAMG

Synopsis#

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

Logically Collective

Input Parameters#

  • pc - the preconditioner context

  • n - the number of equations

Options Database Key#

  • -pc_gamg_process_eq_limit - set the limit

Note#

PCGAMG will reduce the number of MPI processes used directly on the coarse grids so that there are around equations on each process that has degrees of freedom

See Also#

PCGAMG, PCGAMGSetCoarseEqLim(), PCGAMGSetRankReductionFactors(), PCGAMGSetRepartition()

Level#

intermediate

Location#

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

Implementations#

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

Edit on GitLab

Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages