Basic algorithms of MPI collective operations

Functions
int	MPIB_Scatter_flat (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Scatter_flat_nb (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Gather_flat_nb (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Scatter_flat_rsend (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Gather_flat_rsend (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Gatherv_flat_sync (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int *recvcounts, int *displs, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Scatterv_flat (void *sendbuf, int *sendcounts, int *displs, MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Gatherv_flat (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int *recvcounts, int *displs, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Gatherv_flat_nb (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int *recvcounts, int *displs, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Scatterv_sorted_flat_asc (void *sendbuf, int *sendcounts, int *displs, MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Gatherv_sorted_flat_asc (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int *recvcounts, int *displs, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Scatterv_sorted_flat_dsc (void *sendbuf, int *sendcounts, int *displs, MPI_Datatype sendtype, void *recvbuf, int recvcount, MPI_Datatype recvtype, int root, MPI_Comm comm)
int	MPIB_Gatherv_sorted_flat_dsc (void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, int *recvcounts, int *displs, MPI_Datatype recvtype, int root, MPI_Comm comm)

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Detailed Description

This module provides basic, mostly flat-tree, algorithms of MPI collective operations.

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Function Documentation

int MPIB_Scatter_flat	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int	recvcount,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree scatter using blocking standard or modified p2p

int MPIB_Scatter_flat_nb	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int	recvcount,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree scatter using non-blocking standard or modified p2p

int MPIB_Gather_flat_nb	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int	recvcount,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree gather using standard or modified p2p

int MPIB_Scatter_flat_rsend	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int	recvcount,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree scatter using MPI_Rsend => eager protocol

int MPIB_Gather_flat_rsend	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int	recvcount,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree gather using MPI_Rsend => eager protocol

int MPIB_Gatherv_flat_sync	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int *	recvcounts,
		int *	displs,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree gatherv with sync, taken from OMPI trunk

int MPIB_Scatterv_flat	(	void *	sendbuf,
		int *	sendcounts,
		int *	displs,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int	recvcount,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree scatterv

int MPIB_Gatherv_flat	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int *	recvcounts,
		int *	displs,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree gatherv

int MPIB_Gatherv_flat_nb	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int *	recvcounts,
		int *	displs,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree gatherv using non-blocking standard p2p

int MPIB_Scatterv_sorted_flat_asc	(	void *	sendbuf,
		int *	sendcounts,
		int *	displs,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int	recvcount,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree scatterv with sendcounts sorted in ascending order

int MPIB_Gatherv_sorted_flat_asc	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int *	recvcounts,
		int *	displs,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree gatherv with recvcounts sorted in ascending order

int MPIB_Scatterv_sorted_flat_dsc	(	void *	sendbuf,
		int *	sendcounts,
		int *	displs,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int	recvcount,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree scatterv with sendcounts sorted in descending order

int MPIB_Gatherv_sorted_flat_dsc	(	void *	sendbuf,
		int	sendcount,
		MPI_Datatype	sendtype,
		void *	recvbuf,
		int *	recvcounts,
		int *	displs,
		MPI_Datatype	recvtype,
		int	root,
		MPI_Comm	comm
	)

Flat-tree gatherv with recvcounts sorted in descending order