PCBDDCSetCoarseningRatio

Set coarsening ratio used in the multi-level version of PCBDDC

Synopsis

#include "petscpc.h" 
PetscErrorCode PCBDDCSetCoarseningRatio(PC pc, PetscInt k)

Logically Collective

Input Parameters

• pc - the preconditioning context

• k - coarsening ratio (H/h at the coarser level)

Options Database Key

• -pc_bddc_coarsening_ratio - Set the coarsening ratio used in multi-level coarsening

Note

Approximately k subdomains at the finer level will be aggregated into a single subdomain at the coarser level

See Also

KSP: Linear System Solvers, PCBDDC, PCBDDCSetLevels()

Level

intermediate

Location

src/ksp/pc/impls/bddc/bddc.c

Implementations

PCBDDCSetCoarseningRatio_BDDC() in src/ksp/pc/impls/bddc/bddc.c

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