teca_mpi_util Namespace Reference

Codes dealing with MPI. More...

Functions
TECA_EXPORT int	equipartition_communicator (MPI_Comm comm, int new_comm_size, MPI_Comm *new_comm)
TECA_EXPORT int	split_communicator (MPI_Comm comm, int group_size, MPI_Comm *new_comm)
TECA_EXPORT int	mpi_rank_0 (MPI_Comm comm)
	return non-zero if this process is MPI rank 0 More...

Detailed Description

Codes dealing with MPI.

Function Documentation

equipartition_communicator()

TECA_EXPORT int teca_mpi_util::equipartition_communicator	(	MPI_Comm	comm,
		int	new_comm_size,
		MPI_Comm *	new_comm
	)

Subset the the communicator comm into a new communicator with new_comm_size ranks. ranks are selected from comm with a uniform stride spreading them approximatelyt equally across nodes.

mpi_rank_0()

TECA_EXPORT int teca_mpi_util::mpi_rank_0

(

MPI_Comm

comm

)

return non-zero if this process is MPI rank 0

split_communicator()

TECA_EXPORT int teca_mpi_util::split_communicator	(	MPI_Comm	comm,
		int	group_size,
		MPI_Comm *	new_comm
	)

Split the communicator into a number of new communicators such that each new communicator has group_size ranks.