PCGAMGASMSetUseAggs#
Have the PCGAMG
smoother on each level use PCASM
where the aggregates defined by the coarsening process are the subdomains for the additive Schwarz preconditioner used as the smoother
Synopsis#
#include "petscpc.h"
#include "petscksp.h"
PetscErrorCode PCGAMGASMSetUseAggs(PC pc, PetscBool flg)
Collective
Input Parameters#
pc - the preconditioner context
flg -
PETSC_TRUE
to use aggregates,PETSC_FALSE
to not
Options Database Key#
-pc_gamg_asm_use_agg <true,false> - use aggregates to define the additive Schwarz subdomains
Note#
This option automatically sets the preconditioner on the levels to be PCASM
.
See Also#
the Users Manual section on PCGAMG, the Users Manual section on PCMG, KSP: Linear System Solvers, PCGAMG
, PCASM
, PCSetType
Level#
intermediate
Location#
Implementations#
PCGAMGASMSetUseAggs_GAMG() in src/ksp/pc/impls/gamg/gamg.c
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