PCASMGetSubKSP#

Gets the local KSP contexts for all blocks on this processor.

Synopsis#

#include "petscpc.h" 
PetscErrorCode PCASMGetSubKSP(PC pc, PetscInt *n_local, PetscInt *first_local, KSP *ksp[])

Collective iff first_local is requested

Input Parameter#

  • pc - the preconditioner context

Output Parameters#

  • n_local - the number of blocks on this processor or NULL

  • first_local - the global number of the first block on this processor or NULL, all processors must request or all must pass NULL

  • ksp - the array of KSP contexts

Notes#

After PCASMGetSubKSP() the array of KSPs is not to be freed.

You must call KSPSetUp() before calling PCASMGetSubKSP().

Fortran Notes#

The output argument ‘ksp’ must be an array of sufficient length or PETSC_NULL_KSP. The latter can be used to learn the necessary length.

See Also#

KSP: Linear System Solvers, PCASM, PCASMSetTotalSubdomains(), PCASMSetOverlap(), PCASMCreateSubdomains2D(),

Level#

advanced

Location#

src/ksp/pc/impls/asm/asm.c

Examples#

src/ksp/ksp/tutorials/ex8.c

Implementations#

PCASMGetSubKSP_ASM() in src/ksp/pc/impls/asm/asm.c

Index of all PC routines
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Index of all manual pages