ISAllGatherIndices

 Given a a set of integers on each processor, generates a large set (same on each processor) by concatenating together each processors integers

Synopsis

#include "petscsys.h" 
#include "petscis.h"  
PetscErrorCode  ISAllGatherIndices(MPI_Comm comm,PetscInt n,const PetscInt lindices[],PetscInt *outN,PetscInt *outindices[])
Collective on MPI_Comm

Input Parameter

comm - communicator to share the indices
n - local size of set
lindices - local indices

Output Parameter

outN - total number of indices
outindices - all of the integers

Notes

ISAllGatherIndices() is clearly not scalable for large index sets.

See Also

ISCreateGeneral(), ISCreateStride(), ISCreateBlock(), ISAllGather()

Level:intermediate
Location:src/vec/is/utils/iscoloring.c
Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages