Wrappers for MPI functions. More...

#include "mytype.h"

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Data Structures
struct	RankReduceDataSt
	Structure for use with MPI_MINLOC and MPI_MAXLOC operations. More...

Typedefs
typedef struct RankReduceDataSt	RankReduceData
	Structure for use with MPI_MINLOC and MPI_MAXLOC operations. More...

Functions
int	getNRanks (void)
	Return total number of processors. More...

int	getMyRank (void)
	Return local rank. More...

int	printRank (void)
	Return non-zero if printing occurs from this rank. More...

void	timestampBarrier (const char *msg)
	Print a timestamp and message when all tasks arrive. More...

void	initParallel (int argc, char **argv)
	Wrapper for MPI_Init. More...

void	destroyParallel (void)
	Wrapper for MPI_Finalize. More...

void	barrierParallel (void)
	Wrapper for MPI_Barrier(MPI_COMM_WORLD). More...

int	sendReceiveParallel (void sendBuf, int sendLen, int dest, void recvBuf, int recvLen, int source)
	Wrapper for MPI_Sendrecv. More...

void	addIntParallel (int sendBuf, int recvBuf, int count)
	Wrapper for MPI_Allreduce integer sum. More...

void	addRealParallel (real_t sendBuf, real_t recvBuf, int count)
	Wrapper for MPI_Allreduce real sum. More...

void	addDoubleParallel (double sendBuf, double recvBuf, int count)
	Wrapper for MPI_Allreduce double sum. More...

void	maxIntParallel (int sendBuf, int recvBuf, int count)
	Wrapper for MPI_Allreduce integer max. More...

void	minRankDoubleParallel (RankReduceData sendBuf, RankReduceData recvBuf, int count)
	Wrapper for MPI_Allreduce double min with rank. More...

void	maxRankDoubleParallel (RankReduceData sendBuf, RankReduceData recvBuf, int count)
	Wrapper for MPI_Allreduce double max with rank. More...

void	bcastParallel (void *buf, int len, int root)
	Wrapper for MPI_Bcast. More...

int	builtWithMpi (void)
	Return non-zero if code was built with MPI active. More...

Detailed Description

Wrappers for MPI functions.

Definition in file parallel.h.

Typedef Documentation

typedef struct RankReduceDataSt RankReduceData

Structure for use with MPI_MINLOC and MPI_MAXLOC operations.

Function Documentation

void addDoubleParallel	(	double *	sendBuf,
		double *	recvBuf,
		int	count
	)

Wrapper for MPI_Allreduce double sum.

Definition at line 133 of file parallel.c.

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void addIntParallel	(	int *	sendBuf,
		int *	recvBuf,
		int	count
	)

Wrapper for MPI_Allreduce integer sum.

Definition at line 113 of file parallel.c.

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void addRealParallel	(	real_t *	sendBuf,
		real_t *	recvBuf,
		int	count
	)

Wrapper for MPI_Allreduce real sum.

Definition at line 123 of file parallel.c.

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void barrierParallel ( void )

Wrapper for MPI_Barrier(MPI_COMM_WORLD).

Definition at line 79 of file parallel.c.

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void bcastParallel	(	void *	buf,
		int	count,
		int	root
	)

Wrapper for MPI_Bcast.

Parameters

[in] count Length of buf in bytes.

Definition at line 181 of file parallel.c.

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int builtWithMpi ( void )

Return non-zero if code was built with MPI active.

Definition at line 188 of file parallel.c.

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void destroyParallel ( void )

Wrapper for MPI_Finalize.

Definition at line 72 of file parallel.c.

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int getMyRank ( void )

Return local rank.

Definition at line 36 of file parallel.c.

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int getNRanks ( void )

Return total number of processors.

Definition at line 31 of file parallel.c.

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void initParallel	(	int *	argc,
		char ***	argv
	)

Wrapper for MPI_Init.

Definition at line 63 of file parallel.c.

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void maxIntParallel	(	int *	sendBuf,
		int *	recvBuf,
		int	count
	)

Wrapper for MPI_Allreduce integer max.

Definition at line 143 of file parallel.c.

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void maxRankDoubleParallel	(	RankReduceData *	sendBuf,
		RankReduceData *	recvBuf,
		int	count
	)

Wrapper for MPI_Allreduce double max with rank.

Definition at line 167 of file parallel.c.

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void minRankDoubleParallel	(	RankReduceData *	sendBuf,
		RankReduceData *	recvBuf,
		int	count
	)

Wrapper for MPI_Allreduce double min with rank.

Definition at line 154 of file parallel.c.

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int printRank ( void )

Return non-zero if printing occurs from this rank.

For now this is just a check for rank 0 but in principle it could be more complex. It is also possible to suppress practically all output by causing this function to return 0 for all ranks.

Definition at line 45 of file parallel.c.

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int sendReceiveParallel	(	void *	sendBuf,
		int	sendLen,
		int	dest,
		void *	recvBuf,
		int	recvLen,
		int	source
	)

Wrapper for MPI_Sendrecv.

Parameters

[in]	sendBuf	Data to send.
[in]	sendLen	Number of bytes to send.
[in]	dest	Rank in MPI_COMM_WORLD where data will be sent.
[out]	recvBuf	Received data.
[in]	recvLen	Maximum number of bytes to receive.
[in]	source	Rank in MPI_COMM_WORLD from which to receive.

Returns: Number of bytes received.

Definition at line 93 of file parallel.c.

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void timestampBarrier ( const char * msg )

Print a timestamp and message when all tasks arrive.

Definition at line 51 of file parallel.c.

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Data Structures

Typedefs

Functions

Detailed Description

Typedef Documentation

Function Documentation