VecScatterCreateToAll#
Creates a vector and a scatter context that copies all vector values to each processor
Synopsis#
#include "petscsf.h"
PetscErrorCode VecScatterCreateToAll(Vec vin, VecScatter *ctx, Vec *vout)
Collective on Vec
Input Parameter#
vin - input MPIVEC
Output Parameters#
ctx - scatter context
vout - output SEQVEC that is large enough to scatter into
Note: vout may be NULL [PETSC_NULL_VEC from fortran] if you do not need to have it created
Usage#
VecScatterCreateToAll(vin,&ctx,&vout);
// scatter as many times as you need
VecScatterBegin(ctx,vin,vout,INSERT_VALUES,SCATTER_FORWARD);
VecScatterEnd(ctx,vin,vout,INSERT_VALUES,SCATTER_FORWARD);
// destroy scatter context and local vector when no longer needed
VecScatterDestroy(&ctx);
VecDestroy(&vout);
Do NOT create a vector and then pass it in as the final argument vout! vout is created by this routine automatically (unless you pass NULL in for that argument if you do not need it).
See Also#
VecScatterCreate()
, VecScatterCreateToZero()
, VecScatterBegin()
, VecScatterEnd()
Level#
intermediate
Location#
Examples#
src/ksp/ksp/tutorials/ex43.c.html
src/ksp/ksp/tutorials/ex49.c.html
Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages