PetscSF#

PETSc object for setting up and managing the communication of certain entries of arrays and Vec between MPI ranks.

Synopsis#

typedef struct _p_PetscSF *PetscSF;

PetscSF uses the concept of star forests to indicate and determine the communication patterns concisely and efficiently. A star https://en.wikipedia.org/wiki/Star_(graph_theory) forest is simply a collection of trees of height 1. The leave nodes represent “ghost locations” for the root nodes.

See Also#

PetscSFCreate(), VecScatter, VecScatterCreate()

Level#

intermediate

Location#

include/petscsftypes.h

Examples#

src/dm/tutorials/swarm_ex3.c
src/vec/is/sf/tutorials/ex2.c
src/dm/tutorials/ex25.c
src/ts/tutorials/ex30.c
src/vec/is/sf/tutorials/ex3.c
src/dm/impls/plex/tutorials/ex14.c
src/ts/tutorials/ex11.c
src/vec/is/sf/tutorials/ex1f.F90
src/ts/tutorials/ex11_sa.c
src/vec/is/sf/tutorials/ex1.c

Implementations#

_p_PetscSF in include/petsc/private/sfimpl.h
PetscSF_Allgatherv in src/vec/is/sf/impls/basic/allgatherv/sfallgatherv.h
PetscSF_Neighbor in src/vec/is/sf/impls/basic/neighbor/sfneighbor.c
PetscSF_Basic in src/vec/is/sf/impls/basic/sfbasic.h
PetscSF_Window in src/vec/is/sf/impls/window/sfwindow.c


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