petsc-3.9.4 2018-09-11
KSPGetDiagonalScaleFix
Determines if KSP diagonally scales the system back after solving.
Synopsis
#include "petscksp.h"
PetscErrorCode KSPGetDiagonalScaleFix(KSP ksp,PetscBool *fix)
Not Collective
Input Parameter
ksp -the KSP context
Output Parameter
fix -PETSC_TRUE to scale back after the system solve, PETSC_FALSE to not
rescale (default)
Notes
Must be called after KSPSetDiagonalScale()
If PETSC_TRUE will slow things down, because it rescales the matrix before and
after each linear solve. This is intended mainly for testing to allow one
to easily get back the original system to make sure the solution computed is
accurate enough.
Keywords
set, options, prefix, database
See Also
KSPGetDiagonalScale(), KSPSetDiagonalScale(), KSPSetDiagonalScaleFix(), KSP
Level
intermediate
Location
src/ksp/ksp/interface/itfunc.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages