PetscSFCreateEmbeddedRootSF#

removes edges from all but the selected roots of a PetscSF, does not remap indices

Synopsis#

#include "petscsf.h" 
PetscErrorCode PetscSFCreateEmbeddedRootSF(PetscSF sf, PetscInt nselected, const PetscInt *selected, PetscSF *esf)

Collective

Input Parameters#

  • sf - original star forest

  • nselected - number of selected roots on this process

  • selected - indices of the selected roots on this process

Output Parameter#

  • esf - new star forest

Note#

To use the new PetscSF, it may be necessary to know the indices of the leaves that are still participating. This can be done by calling PetscSFGetGraph().

See Also#

PetscSF, PetscSFSetGraph(), PetscSFGetGraph()

Level#

advanced

Location#

src/vec/is/sf/interface/sf.c

Examples#

src/vec/is/sf/tutorials/ex1.c

Implementations#

PetscSFCreateEmbeddedRootSF_Alltoall in src/vec/is/sf/impls/basic/alltoall/sfalltoall.c
PetscSFCreateEmbeddedRootSF_Basic in src/vec/is/sf/impls/basic/sfbasic.c

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