Preconditioner - ILU

Usage:

-pc_type ilu

Options:

-pc_factor_levels

levels of fill. Default = 0

-pc_factor_in_place

do factorization in place

-pc_factor_diagonal_fill

Allow fill into empty diagonal entry

-pc_factor_reuse_fill

Reuse fill ratio from previous factorization

-pc_factor_reuse_ordering

Reuse previous reordering

-pc_factor_shift_nonzero

Shift added to diagonal

-pc_factor_shift_nonzero

Shift added to diagonal. Default = 0

-pc_factor_shift_positive_definite

Manteuffel shift applied to diagonal

-pc_factor_zeropivot

Pivot is considered zero if less than ?. Default = 1e-12

-pc_factor_use_drop_tolerance

<dt,dtcol,maxrowcount>. Default = -2

-pc_factor_fill

Expected fill in factorization. Default = 1

-pc_factor_nonzeros_along_diagonal

Reorder to remove zeros from diagonal

-pc_factor_mat_ordering_type

Reorder to reduce nonzeros in ILU: (one of)
natural
nd
1wd
rcm
qmd
rowlength

-pc_factor_pivot_in_blocks

Pivot inside matrix blocks for BAIJ and SBAIJ. Default = TRUE

Info:

Back to Main Page