PCLUSetFill
Indicate the amount of fill you expect in the factored matrix, fill = number nonzeros in factor/number nonzeros in original matrix.
Synopsis
int PCLUSetFill(PC pc,double fill)
Collective on
PC
Input Parameters
pc | - the preconditioner context
|
fill | - amount of expected fill
|
Options Database Key
-pc_lu_fill <fill> -Sets fill amount
Note
For sparse matrix factorizations it is difficult to predict how
muchfill to expect. By running with the option -log_info PETSc will print
theactual amount of fill used; allowing you to set the value accurately
forfuture runs. Bt default PETSc uses a value of 5.
0
Keywords
PC, set, factorization, direct, fill
See Also
PCILUSetFill()
Location: src/pc/impls/lu/lu.c
PC Index
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