petsc-3.14.6 2021-03-30

VecCreateMPIViennaCLWithArray

Creates a parallel, array-style vector, where the user provides the viennacl vector to store the vector values.

Synopsis

#include "petscvec.h"   
PetscErrorCode  VecCreateMPIViennaCLWithArray(MPI_Comm comm,PetscInt bs,PetscInt n,PetscInt N,const ViennaCLVector *array,Vec *vv)

Collective

Input Parameters

	comm	- the MPI communicator to use
	bs	- block size, same meaning as VecSetBlockSize()
	n	- local vector length, cannot be PETSC_DECIDE
	N	- global vector length (or PETSC_DECIDE to have calculated)
	array	- the user provided GPU array to store the vector values

Output Parameter

- the vector

Notes

Use VecDuplicate() or VecDuplicateVecs() to form additional vectors of the same type as an existing vector.

If the user-provided array is NULL, then VecViennaCLPlaceArray() can be used at a later stage to SET the array for storing the vector values.

PETSc does NOT free the array when the vector is destroyed via VecDestroy(). The user should not free the array until the vector is destroyed.

Level

intermediate

Location

src/vec/vec/impls/mpi/mpiviennacl/mpiviennacl.cxx
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages