petsc-3.3-p7 2013-05-11
PetscSFGatherBegin
begin pointwise gather of all leaves into multi-roots, to be completed with PetscSFGatherEnd()
Synopsis
PetscErrorCode PetscSFGatherBegin(PetscSF sf,MPI_Datatype unit,const void *leafdata,void *multirootdata)
Collective
Input Arguments
| sf | - star forest
|
| unit | - data type
|
| leafdata | - leaf data to gather to roots
|
Output Argument
multirootdata -root buffer to gather into, amount of space per root is equal to its degree
See Also
PetscSFComputeDegreeBegin(), PetscSFScatterBegin()
Level:intermediate
Location:src/sys/sf/sf.c
Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages
Examples
src/sys/sf/examples/tutorials/ex1.c.html