petsc-3.4.4 2014-03-13

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 on PC

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

Notes

See the pARMS function parms_PCSetFill for more information.

See Also

PCPARMS

Level:intermediate
Location:
src/ksp/pc/impls/parms/parms.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages