petsc-master 2020-11-24
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Set a parallel star forest via global indices and a PetscLayout


#include "petscsf.h"   
PetscErrorCode PetscSFSetGraphLayout(PetscSF sf,PetscLayout layout,PetscInt nleaves,const PetscInt *ilocal,PetscCopyMode localmode,const PetscInt *iremote)

Input Arguments

sf - star forest
layout - PetscLayout defining the global space
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, pass NULL for contiguous storage
localmode - copy mode for ilocal
iremote - remote locations of root vertices for each leaf on the current process

Developers Note: Local indices which are the identity permutation in the range [0,nleaves) are discarded as they encode contiguous storage. In such case, if localmode is PETSC_OWN_POINTER, the memory is deallocated as it is not needed

See Also

PetscSFCreate(), PetscSFView(), PetscSFSetGraph(), PetscSFGetGraph()




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