PetscSFGetGraphLayout#

Get the global indices and PetscLayout that describe this star forest

Synopsis#

#include "petscsf.h"   
PetscErrorCode PetscSFGetGraphLayout(PetscSF sf, PetscLayout *layout, PetscInt *nleaves, const PetscInt *ilocal[], PetscInt *gremote[])

Collective

Input Parameter#

  • sf - star forest

Output Parameters#

  • layout - PetscLayout defining the global space for roots

  • nleaves - number of leaf vertices on the current process, each of these references a root on any process

  • ilocal - locations of leaves in leafdata buffers, or NULL for contiguous storage

  • gremote - root vertices in global numbering corresponding to leaves in ilocal

Notes#

The outputs are such that passing them as inputs to PetscSFSetGraphLayout() would lead to the same star forest. The outputs layout and gremote are freshly created each time this function is called, so they need to be freed by user and cannot be qualified as const.

See Also#

PetscSF, PetscSFSetGraphLayout(), PetscSFCreate(), PetscSFView(), PetscSFSetGraph(), PetscSFGetGraph()

Level#

intermediate

Location#

src/vec/is/sf/utils/sfutils.c

Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages