petsc-main 2021-03-04
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VecScatterRemap

Remaps the "from" and "to" indices in a vector scatter context. FOR EXPERTS ONLY!

Synopsis

#include "petscsf.h" 
PetscErrorCode  VecScatterRemap(VecScatter sf,PetscInt tomap[],PetscInt frommap[])
Collective on VecScatter

Input Parameters

sf - vector scatter context
tomap - remapping plan for "to" indices (may be NULL).
frommap - remapping plan for "from" indices (may be NULL)

Notes

In the parallel case the todata contains indices from where the data is taken (and then sent to others)! The fromdata contains indices from where the received data is finally put locally.

In the sequential case the todata contains indices from where the data is put and the fromdata contains indices from where the data is taken from. This is backwards from the paralllel case!

Level

developer

Location

src/vec/is/sf/interface/vscat.c
Index of all PetscSF routines
Table of Contents for all manual pages
Index of all manual pages