KSPGetDiagonalScaleFix#

Determines if KSP diagonally scales the system back after solving.

Synopsis#

#include "petscksp.h" 
#include "petscmat.h" 
PetscErrorCode KSPGetDiagonalScaleFix(KSP ksp, PetscBool *fix)

Not Collective

Input Parameter#

  • ksp - the KSP context

Output Parameter#

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.

See Also#

KSPGetDiagonalScale(), KSPSetDiagonalScale(), KSPSetDiagonalScaleFix(), KSP

Level#

intermediate

Location#

src/ksp/ksp/interface/itfunc.c


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Index of all KSP routines
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Index of all manual pages