PCGAMGSetCpuPinCoarseGrids#

pin the coarse grids created in PCGAMG to run only on the CPU since the problems may be too small to run efficiently on the GPUs

Synopsis#

#include "petscpc.h" 
#include "petscksp.h" 
PetscErrorCode PCGAMGSetCpuPinCoarseGrids(PC pc, PetscBool flg)

Collective

Input Parameters#

  • pc - the preconditioner context

  • flg - PETSC_TRUE to pin coarse grids to the CPU

Options Database Key#

  • -pc_gamg_cpu_pin_coarse_grids - pin the coarse grids to the CPU

See Also#

KSP: Linear System Solvers, PCGAMG, PCGAMGSetCoarseGridLayoutType(), PCGAMGSetParallelCoarseGridSolve()

Level#

intermediate

Location#

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

Implementations#

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

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