MatSubdomainsCreateCoalesce#

Creates index subdomains by coalescing adjacent ranks’ ownership ranges.

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatSubdomainsCreateCoalesce(Mat A, PetscInt N, PetscInt *n, IS *iss[])

Collective

Input Parameters#

  • A - the matrix to create subdomains from

  • N - requested number of subdomains

Output Parameters#

  • n - number of subdomains resulting on this rank

  • iss - IS list with indices of subdomains on this rank

Note#

The number of subdomains must be smaller than the communicator size

See Also#

Matrices, Mat, IS

Level#

advanced

Location#

src/mat/interface/matrix.c

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