KSPSetDMActive#

Indicates the DM should be used to generate the linear system matrix and right hand side vector

Synopsis#

#include "petscksp.h" 
PetscErrorCode KSPSetDMActive(KSP ksp, PetscBool flg)

Logically Collective

Input Parameters#

  • ksp - the preconditioner context

  • flg - use the DM

Note#

By default KSPSetDM() sets the DM as active, call KSPSetDMActive(ksp,PETSC_FALSE); after KSPSetDM(ksp,dm) to not have the KSP object use the DM to generate the matrices.

See Also#

KSP: Linear System Solvers, KSP, DM, KSPGetDM(), KSPSetDM(), SNESSetDM(), KSPSetComputeOperators(), KSPSetComputeRHS(), KSPSetComputeInitialGuess()

Level#

intermediate

Location#

src/ksp/ksp/interface/iterativ.c

Examples#

src/dm/impls/stag/tutorials/ex4.c.html
src/dm/impls/stag/tutorials/ex8.c.html
src/ksp/ksp/tutorials/ex29.c.html
src/ksp/ksp/tutorials/ex43.c.html
src/ksp/ksp/tutorials/ex70.c.html
src/ksp/ksp/tutorials/ex73.c.html


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