VecGetOwnershipRanges#

Returns the range of indices owned by EACH processor, 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 VecGetOwnershipRanges(Vec x, const PetscInt *ranges[])

Not Collective

Input Parameter#

  • x - the vector

Output Parameter#

  • range - array of length size+1 with the start and end+1 for each process

Notes#

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

If the ranges are used after all vectors that share the ranges has been destroyed then the program will crash accessing ranges[].

Fortran Note#

You must PASS in an array of length size+1

See Also#

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

Level#

beginner

Location#

src/vec/vec/interface/vector.c

Examples#

src/tao/pde_constrained/tutorials/elliptic.c


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Index of all Vec routines
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