petsc-3.13.6 2020-09-29
PetscSFGetRootRanks
Get root ranks and number of vertices referenced by leaves on this process
Synopsis
#include "petscsf.h"
PetscErrorCode PetscSFGetRootRanks(PetscSF sf,PetscInt *nranks,const PetscMPIInt **ranks,const PetscInt **roffset,const PetscInt **rmine,const PetscInt **rremote)
Not Collective
Input Arguments
sf -star forest
Output Arguments
| nranks | - number of ranks referenced by local part
|
| ranks | - array of ranks
|
| roffset | - offset in rmine/rremote for each rank (length nranks+1)
|
| rmine | - concatenated array holding local indices referencing each remote rank
|
| rremote | - concatenated array holding remote indices referenced for each remote rank
|
See Also
PetscSFGetLeafRanks()
Level
developer
Location
src/vec/is/sf/interface/sf.c
Examples
src/vec/is/sf/tutorials/ex1.c.html
Implementations
PetscSFGetRootRanks_Allgatherv in src/vec/is/sf/impls/basic/allgatherv/sfallgatherv.c
Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages