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
lfil0 - the level of fill-in kept in LB, UB, E/UB and LB\F
lfil1 - the level of fill-in kept in S
lfil2 - 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.

Level#

intermediate

Location#

src/ksp/pc/impls/parms/parms.c

Implementations#

PCPARMSSetFill_PARMS() in src/ksp/pc/impls/parms/parms.c

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