PCPARMSSetFill#
Sets the fill-in parameters for ILUT, ILUK and ARMS preconditioners. Consider the original matrix A = [B F; E C] and the approximate version M = [LB 0; E/UB I]*[UB LB\F; 0 S].
Synopsis#
#include "petscpc.h"
PetscErrorCode PCPARMSSetFill(PC pc, PetscInt lfil0, PetscInt lfil1, PetscInt lfil2)
Collective
Input Parameters#
pc - the preconditioner context
fil0 - the level of fill-in kept in LB, UB, E/UB and LB\F
fil1 - the level of fill-in kept in S
fil2 - the level of fill-in kept in the L and U parts of the LU factorization of S
Options Database Keys#
-pc_parms_lfil_ilu_arms - set the amount of fill-in for ilut, iluk and arms
-pc_parms_lfil_schur - set the amount of fill-in for schur
-pc_parms_lfil_ilut_L_U - set the amount of fill-in for ILUT L and U
Note#
See the pARMS function parms_PCSetFill() for more information.
See Also#
Level#
intermediate
Location#
Implementations#
PCPARMSSetFill_PARMS in src/ksp/pc/impls/parms/parms.c
Index of all PC routines
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