#include "petscsf.h" PetscErrorCode PetscSFGatherBegin(PetscSF sf,MPI_Datatype unit,const void *leafdata,void *multirootdata)Collective
sf | - star forest | |
unit | - data type | |
leafdata | - leaf data to gather to roots |
multirootdata | - root buffer to gather into, amount of space per root is equal to its degree |