typedef struct {
PetscReal levels; /* ILU(levels) */
PetscReal fill; /* expected fill; nonzeros in factored matrix/nonzeros in original matrix*/
PetscReal diagonal_fill; /* force diagonal to fill in if initially not filled */
PetscReal dt; /* drop tolerance */
PetscReal dtcol; /* tolerance for pivoting */
PetscReal dtcount; /* maximum nonzeros to be allowed per row */
PetscReal damping; /* scaling of identity added to matrix to prevent zero pivots */
PetscReal damp; /* if is 1.0 and factorization fails, damp until successful */
PetscReal zeropivot; /* pivot is called zero if less than this */
PetscReal pivotinblocks; /* for BAIJ and SBAIJ matrices pivot in factorization on blocks, default 1.0
factorization may be faster if do not pivot */
} MatILUInfo;
In Fortran these are simply double precision arrays of size MAT_ILUINFO_SIZE
Notes: These are not usually directly used by users, instead use the PC type of ILU All entries are double precision.
Level:developer
Location:src/mat/../../include/petscmat.h
Index of all Mat routines
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