petsc-master 2020-11-24
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PCGAMGSetRankReductionFactors

Set manual schedual for process reduction on coarse grids

Synopsis

#include "petscpc.h" 
#include "petscksp.h" 
PetscErrorCode PCGAMGSetRankReductionFactors(PC pc, PetscInt v[], PetscInt n)
Collective on PC

Input Parameters

pc - the preconditioner context
v - array of reduction factors. 0 for fist value forces a reduction to one process/device on first level in Cuda
n - number of values provided in array

Options Database Key

-pc_gamg_rank_reduction_factors <factors>

See Also

PCGAMGSetProcEqLim(), PCGAMGSetCoarseEqLim()

Level

intermediate

Location

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

Implementations

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

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