oops::mpi Namespace Reference

Functions
const eckit::mpi::Comm &	world ()
	Default communicator with all MPI tasks (ie MPI_COMM_WORLD) More...
const eckit::mpi::Comm &	myself ()
	Default communicator with each MPI task by itself. More...
void	gather (const eckit::mpi::Comm &comm, const std::vector< double > &send, std::vector< double > &recv, const size_t root)
void	allGather (const eckit::mpi::Comm &comm, const Eigen::VectorXd &sendbuf, std::vector< Eigen::VectorXd > &recvbuf)
template<typename SERIALIZABLE >
void	send (const eckit::mpi::Comm &comm, const SERIALIZABLE &sendobj, const int dest, const int tag)
	Extend eckit Comm for Serializable oops objects. More...
template<typename SERIALIZABLE >
void	receive (const eckit::mpi::Comm &comm, SERIALIZABLE &recvobj, const int source, const int tag)
template<typename SERIALIZABLE >
void	gather (const eckit::mpi::Comm &comm, const std::vector< SERIALIZABLE > &send, std::vector< SERIALIZABLE > &recv, const size_t root)
template<typename CIter , typename Iter >
void	allGathervUsingSerialize (const eckit::mpi::Comm &comm, CIter first, CIter last, Iter recvbuf)
	A wrapper around the MPI all gather operation for serializable types. More...

Function Documentation

allGather()

void oops::mpi::allGather	(	const eckit::mpi::Comm &	comm,
		const Eigen::VectorXd &	sendbuf,
		std::vector< Eigen::VectorXd > &	recvbuf
	)

Definition at line 58 of file oops/mpi/mpi.cc.

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allGathervUsingSerialize()

template<typename CIter , typename Iter >

void oops::mpi::allGathervUsingSerialize	(	const eckit::mpi::Comm &	comm,
		CIter	first,
		CIter	last,
		Iter	recvbuf
	)

A wrapper around the MPI all gather operation for serializable types.

The all gather operation gathers data from all tasks and delivers the combined data to all tasks. This wrapper performs that operation for collections of non-primitive types that nevertheless support the OOPS serialization interface, i.e. provide the functions

void serialize(std::vector<double> &vect) const;
void deserialize(const std::vector<double> &vect, size_t &current);

An example of such a type is util::DateTime.

Parameters

comm	Communicator.
first,last	Range of values to be delivered from this task to all other tasks.
recvbuf	Output iterator to the beginning of the range to receive the combined data from all tasks.

Definition at line 107 of file oops/mpi/mpi.h.

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gather() [1/2]

void oops::mpi::gather	(	const eckit::mpi::Comm &	comm,
		const std::vector< double > &	send,
		std::vector< double > &	recv,
		const size_t	root
	)

Definition at line 34 of file oops/mpi/mpi.cc.

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gather() [2/2]

template<typename SERIALIZABLE >

void oops::mpi::gather	(	const eckit::mpi::Comm &	comm,
		const std::vector< SERIALIZABLE > &	send,
		std::vector< SERIALIZABLE > &	recv,
		const size_t	root
	)

Definition at line 64 of file oops/mpi/mpi.h.

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myself()

const eckit::mpi::Comm & oops::mpi::myself

(

)

Default communicator with each MPI task by itself.

Definition at line 28 of file oops/mpi/mpi.cc.

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receive()

template<typename SERIALIZABLE >

void oops::mpi::receive	(	const eckit::mpi::Comm &	comm,
		SERIALIZABLE &	recvobj,
		const int	source,
		const int	tag
	)

Definition at line 46 of file oops/mpi/mpi.h.

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send()

template<typename SERIALIZABLE >

void oops::mpi::send	(	const eckit::mpi::Comm &	comm,
		const SERIALIZABLE &	sendobj,
		const int	dest,
		const int	tag
	)

Extend eckit Comm for Serializable oops objects.

Definition at line 36 of file oops/mpi/mpi.h.

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world()

const eckit::mpi::Comm & oops::mpi::world

(

)

Default communicator with all MPI tasks (ie MPI_COMM_WORLD)

Definition at line 22 of file oops/mpi/mpi.cc.

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