petsc-3.3-p7 2013-05-11

VecCreateSeqPThread

Creates a standard, sequential array-style vector using posix threads.

#include "petscvec.h" 
PetscErrorCode VecCreateSeqPThread(MPI_Comm comm,PetscInt n,PetscInt nthreads,PetscInt affinities[],Vec *v)

Collective on MPI_Comm

	comm	- the communicator, should be PETSC_COMM_SELF
	n	- the vector length
	nthreads	- number of threads
	affinities	- thread affinities

V -the vector

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

Use nthreads = PETSC_DECIDE for PETSc to decide the number of threads and affinities = PETSC_NULL to decide the thread affinities.

-vec_threads <nthreads> - Sets number of threads to be used for vector operations -vec_thread_affinities - Comma seperated list of thread affinities