PetscSFGetLeafRanks

Get leaf MPI ranks referencing roots on this process

Synopsis

#include "petscsf.h" 
PetscErrorCode PetscSFGetLeafRanks(PetscSF sf, PetscMPIInt *niranks, const PetscMPIInt *iranks[], const PetscInt *ioffset[], const PetscInt *irootloc[])

Not Collective

Input Parameter

• sf - star forest

Output Parameters

• niranks - number of leaf MPI processes referencing roots on this process

• iranks - [niranks] array of MPI ranks

• ioffset - [niranks+1] offset in irootloc for each MPI process

• irootloc - [ioffset[niranks]] concatenated array holding local indices of roots referenced by each leaf MPI process

See Also

PetscSF - an alternative to low-level MPI calls for data communication, PetscSF, PetscSFGetRootRanks()

Level

developer

Location

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

Examples

src/vec/is/sf/tutorials/ex1f.F90

Implementations

PetscSFGetLeafRanks_Allgatherv() in src/vec/is/sf/impls/basic/allgatherv/sfallgatherv.c
PetscSFGetLeafRanks_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