VecGetOwnershipRange#

Returns the range of indices owned by this process. The vector is laid out with the first n1 elements on the first processor, next n2 elements on the second, etc. For certain parallel layouts this range may not be well defined.

Synopsis#

#include "petscvec.h"   
PetscErrorCode VecGetOwnershipRange(Vec x, PetscInt *low, PetscInt *high)

Not Collective

Input Parameter#

  • x - the vector

Output Parameters#

  • low - the first local element, pass in NULL if not interested

  • high - one more than the last local element, pass in NULL if not interested

Note#

The high argument is one more than the last element stored locally.

Fortran Note#

PETSC_NULL_INTEGER should be used instead of NULL

See Also#

Vectors and Parallel Data, Vec, MatGetOwnershipRange(), MatGetOwnershipRanges(), VecGetOwnershipRanges()

Level#

beginner

Location#

src/vec/vec/interface/vector.c

Examples#

src/dm/tutorials/ex22.c
src/dm/tutorials/ex6.c
src/ksp/ksp/tutorials/ex10.c
src/ksp/ksp/tutorials/ex23.c
src/ksp/ksp/tutorials/ex3.c
src/ksp/ksp/tutorials/ex49.c
src/ksp/ksp/tutorials/ex5.c
src/ksp/ksp/tutorials/ex5f.F90
src/ksp/ksp/tutorials/ex71.c
src/ksp/ksp/tutorials/ex72.c
src/ksp/ksp/tutorials/ex73.c

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