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 Parameter

• sf - star forest

Output Parameters

• nranks - number of ranks referenced by local part

• ranks - [nranks] array of ranks

• roffset - [nranks+1] offset in rmine/rremote for each rank

• rmine - [roffset[nranks]] concatenated array holding local indices referencing each remote rank

• rremote - [roffset[nranks]] concatenated array holding remote indices referenced for each remote rank

See Also

PetscSF, PetscSFGetLeafRanks()

Level

developer

Location

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

Examples

src/vec/is/sf/tutorials/ex1f.F90
src/vec/is/sf/tutorials/ex1.c

Implementations

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

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Index of all PetscSF routines
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Index of all manual pages