PCILUSetUseDropTolerance

The preconditioner will use an ILU based on a drop tolerance.

Synopsis

#include "pc.h"  
int PCILUSetUseDropTolerance(PC pc,PetscReal dt,PetscReal dtcol,int dtcount)
Collective on PC

Input Parameters

pc - the preconditioner context
dt - the drop tolerance
dtcol - tolerance for column pivot
dtcount - the max number of nonzeros allowed in a row

Options Database Key

-pc_ilu_use_drop_tolerance <dt,dtcount> -Sets drop tolerance

Notes

This uses the iludt() code of Saad's SPARSKIT package

Keywords

PC, levels, reordering, factorization, incomplete, ILU

Level:intermediate
Location:src/sles/pc/impls/ilu/ilu.c
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