KSPSetDiagonalScaleFix#

Tells KSP to diagonally scale the system back after solving.

Synopsis#

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

Logically Collective

Input Parameters#

Notes#

Must be called after KSPSetDiagonalScale()

Using this 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#

KSP: Linear System Solvers, KSPGetDiagonalScale(), KSPSetDiagonalScale(), KSPGetDiagonalScaleFix(), KSP

Level#

intermediate

Location#

src/ksp/ksp/interface/itfunc.c


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Index of all KSP routines
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