KSPHPDDMSetType#

Sets the type of Krylov method used in KSPHPDDM.

Synopsis#

#include "petscksp.h" 
PetscErrorCode KSPHPDDMSetType(KSP ksp, KSPHPDDMType type)

Collective

Input Parameters#

  • ksp - iterative context

  • type - any of gmres, bgmres, cg, bcg, gcrodr, bgcrodr, bfbcg, or preonly

Notes#

Unlike KSPReset(), this function does not destroy any deflation space attached to the KSP.

As an example, in the following sequence:

     KSPHPDDMSetType(ksp, KSPGCRODR);
     KSPSolve(ksp, b, x);
     KSPHPDDMSetType(ksp, KSPGMRES);
     KSPHPDDMSetType(ksp, KSPGCRODR);
     KSPSolve(ksp, b, x);

the recycled space is reused in the second KSPSolve().

See Also#

KSP: Linear System Solvers, KSPCreate(), KSPType, KSPHPDDMType, KSPHPDDMGetType()

Level#

intermediate

Location#

src/ksp/ksp/impls/hpddm/hpddm.cxx

Examples#

src/ksp/ksp/tutorials/ex78.c

Implementations#

KSPHPDDMSetType_HPDDM() in src/ksp/ksp/impls/hpddm/hpddm.cxx


Index of all KSP routines
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Index of all manual pages