Communication library which wraps MPI. More...

#include <communicator.h>

Classes
class	Base
	base case More...

Static Public Member Functions
static int	init (int pargc, char **pargv)
	initialize communicator More...

static int	finalize ()
	finalize communicator More...

static void	abort ()
	terminate communicator More...

static int	setup (int ninstance=1)
	setup communicator More...

static int	setup (const std::vector< int > &lattice_size, std::vector< int > &grid_size, int ninstance=1)

static bool	is_primary ()
	check if the present node is primary in small communicator. More...

static bool	is_primary_master ()
	check if the present node is primary in global communicator. More...

static int	self ()
	rank within small world. More...

static int	nodeid ()
	alternative name for self(). More...

static int	size ()
	size of small world. More...

static int	ipe (const int dir)
	logical coordinate of current proc. More...

static int	npe (const int dir)
	logical grid extent More...

static int	grid_rank (int rank, const int grid_coord)
	find rank number from grid coordinate. More...

static int	grid_coord (int *grid_coord, const int rank)
	find grid coordinate from rank number. More...

static int	grid_dims (int *grid_dims)
	find grid dimensions. More...

static int	sync ()
	synchronize within small world. More...

static int	sync_usleep ()
	synchronize within small world. (slow but no busy wait) More...

static int	broadcast (int count, double *data, int sender)
	broadcast array of double from sender. More...

static int	broadcast (int count, float *data, int sender)
	broadcast array of float from sender. More...

static int	broadcast (int count, int *data, int sender)
	broadcast array of integer from sender. More...

static int	broadcast (int count, string &data, int sender)
	broadcast a string from sender. count is insignificant. More...

static int	exchange (int count, double recv_buf, double send_buf, int idir, int ipm, int tag)
	receive array of double from upstream specified by idir and ipm, and send array to downstream. More...

static int	exchange (int count, float recv_buf, float send_buf, int idir, int ipm, int tag)
	receive array of float from upstream specified by idir and ipm, and send array to downstream. More...

static int	exchange (int count, int recv_buf, int send_buf, int idir, int ipm, int tag)
	receive array of int from upstream specified by idir and ipm, and send array to downstream. More...

static int	send_1to1 (int count, double recv_buf, double send_buf, int p_to, int p_from, int tag)
	send array of double from rank p_from to rank p_to. communication distinguished by tag. More...

static int	send_1to1 (int count, float recv_buf, float send_buf, int p_to, int p_from, int tag)
	send array of float from rank p_from to rank p_to. communication distinguished by tag. More...

static int	send_1to1 (int count, int recv_buf, int send_buf, int p_to, int p_from, int tag)
	send array of int from rank p_from to rank p_to. communication distinguished by tag. More...

static int	reduce_sum (int count, double recv_buf, double send_buf, int pattern=0)
	make a global sum of an array of double over the communicator. pattern specifies the dimensions to be reduced. More...

static int	reduce_sum (int count, float recv_buf, float send_buf, int pattern=0)
	make a global sum of an array of float over the communicator. pattern specifies the dimensions to be reduced. More...

static int	reduce_sum (int count, int recv_buf, int send_buf, int pattern=0)
	make a global sum of an array of int over the communicator. pattern specifies the dimensions to be reduced. More...

static int	reduce_max (int count, double recv_buf, double send_buf, int pattern=0)
	find a global maximum of an array of double over the communicator. pattern specifies the dimensions to be reduced. More...

static int	reduce_max (int count, float recv_buf, float send_buf, int pattern=0)
	find a global maximum of an array of float over the communicator. pattern specifies the dimensions to be reduced. More...

static int	reduce_max (int count, int recv_buf, int send_buf, int pattern=0)
	find a global maximum of an array of int over the communicator. pattern specifies the dimensions to be reduced. More...

static int	reduce_min (int count, double recv_buf, double send_buf, int pattern=0)
	find a global minimum of an array of double over the communicator. pattern specifies the dimensions to be reduced. More...

static int	reduce_min (int count, float recv_buf, float send_buf, int pattern=0)
	find a global minimum of an array of float over the communicator. pattern specifies the dimensions to be reduced. More...

static int	reduce_min (int count, int recv_buf, int send_buf, int pattern=0)
	find a global minimum of an array of int over the communicator. pattern specifies the dimensions to be reduced. More...

static double	reduce_sum (double)
	alternative interface to reduce_sum(). returns the global sum of a double over the whole communicator. More...

static double	reduce_max (double)
	alternative interface to reduce_max(). returns the global sum of a double over the whole communicator. More...

static double	reduce_min (double)
	alternative interface to reduce_min(). returns the global sum of a double over the whole communicator. More...

static float	reduce_sum (float)
	alternative interface to reduce_sum(). returns the global sum of a float over the whole communicator. More...

static float	reduce_max (float)
	alternative interface to reduce_max(). returns the global sum of a float over the whole communicator. More...

static float	reduce_min (float)
	alternative interface to reduce_min(). returns the global sum of a float over the whole communicator. More...

static double	get_time ()
	obtain a wall-clock time. More...

static Channel *	send_init (int count, int idir, int ipm)

static Channel *	recv_init (int count, int idir, int ipm)

static Channel *	send_init (int count, int idir, int ipm, void *buf)

static Channel *	recv_init (int count, int idir, int ipm, void *buf)

static int	status ()

Private Member Functions
	Communicator ()
	no instance at all More...

	Communicator (const Communicator &)

Communicator &	operator= (const Communicator &)

	~Communicator ()

Detailed Description

Communication library which wraps MPI.

This class provides communication library which wraps MPI (message passing interface) if the implementation file communicator_mpi.cpp is bound. For single processor environment with no MPI library, communicator_dummy.cpp should be bound instead. [28 Dec 2011 H.Matsufuru]

This class defines interface of inter-node communication routines. All methods are static, i.e. class-methods (like global). The explicit definitions are hidden in the implementation classes.

Definition at line 47 of file communicator.h.

Constructor & Destructor Documentation

Communicator::Communicator ( )

inlineprivate

no instance at all

communicator class is not indented to be instantiated. constructor, copy constroctor, assignment operator, and destructor are defined as private.

Definition at line 201 of file communicator.h.

Communicator::Communicator ( const Communicator & )

inlineprivate

Definition at line 202 of file communicator.h.

Communicator::~Communicator ( )

inlineprivate

Definition at line 205 of file communicator.h.

Member Function Documentation

void Communicator::abort ( )

static

terminate communicator

terminate communicator immediately at some erroneous situations.

Definition at line 36 of file communicator.cpp.

int Communicator::broadcast	(	int	count,
		double *	data,
		int	sender
	)

static

broadcast array of double from sender.

Definition at line 169 of file communicator.cpp.

int Communicator::broadcast	(	int	count,
		float *	data,
		int	sender
	)

static

broadcast array of float from sender.

Definition at line 175 of file communicator.cpp.

int Communicator::broadcast	(	int	count,
		int *	data,
		int	sender
	)

static

broadcast array of integer from sender.

Definition at line 181 of file communicator.cpp.

int Communicator::broadcast	(	int	count,
		string &	data,
		int	sender
	)

static

broadcast a string from sender. count is insignificant.

Definition at line 187 of file communicator.cpp.

int Communicator::exchange	(	int	count,
		double *	recv_buf,
		double *	send_buf,
		int	idir,
		int	ipm,
		int	tag
	)

static

receive array of double from upstream specified by idir and ipm, and send array to downstream.

Definition at line 200 of file communicator.cpp.

int Communicator::exchange	(	int	count,
		float *	recv_buf,
		float *	send_buf,
		int	idir,
		int	ipm,
		int	tag
	)

static

receive array of float from upstream specified by idir and ipm, and send array to downstream.

Definition at line 206 of file communicator.cpp.

int Communicator::exchange	(	int	count,
		int *	recv_buf,
		int *	send_buf,
		int	idir,
		int	ipm,
		int	tag
	)

static

receive array of int from upstream specified by idir and ipm, and send array to downstream.

Definition at line 212 of file communicator.cpp.

int Communicator::finalize ( )

static

finalize communicator

finalize communicator. terminates communication environment.

Definition at line 29 of file communicator.cpp.

double Communicator::get_time ( )

static

obtain a wall-clock time.

Definition at line 361 of file communicator.cpp.

int Communicator::grid_coord	(	int *	grid_coord,
		const int	rank
	)

static

find grid coordinate from rank number.

Definition at line 126 of file communicator.cpp.

int Communicator::grid_dims ( int * grid_dims )

static

find grid dimensions.

Definition at line 133 of file communicator.cpp.

int Communicator::grid_rank	(	int *	rank,
		const int *	grid_coord
	)

static

find rank number from grid coordinate.

Definition at line 119 of file communicator.cpp.

int Communicator::init	(	int *	pargc,
		char ***	pargv
	)

static

initialize communicator

initialize communicator.

Parameters

pargc	pointer to argc passed from main function.
pargv	pointer to argv passed from main function.

they would further be passed to communication library for hints to machine-dependent configurations.

MPI implementation of Communicator class which delegates to Communicator_impl class.

Definition at line 22 of file communicator.cpp.

int Communicator::ipe ( const int dir )

static

logical coordinate of current proc.

Definition at line 105 of file communicator.cpp.

bool Communicator::is_primary ( )

static

check if the present node is primary in small communicator.

Definition at line 60 of file communicator.cpp.

bool Communicator::is_primary_master ( )

static

check if the present node is primary in global communicator.

Definition at line 67 of file communicator.cpp.

static int Communicator::nodeid ( )

inlinestatic

alternative name for self().

Definition at line 105 of file communicator.h.

int Communicator::npe ( const int dir )

static

logical grid extent

Definition at line 112 of file communicator.cpp.

Communicator& Communicator::operator= ( const Communicator & )

private

Channel * Communicator::recv_init	(	int	count,
		int	idir,
		int	ipm
	)

static

Definition at line 382 of file communicator.cpp.

Channel * Communicator::recv_init	(	int	count,
		int	idir,
		int	ipm,
		void *	buf
	)

static

Definition at line 68 of file channel.cpp.

int Communicator::reduce_max	(	int	count,
		double *	recv_buf,
		double *	send_buf,
		int	pattern = `0`
	)

static

find a global maximum of an array of double over the communicator. pattern specifies the dimensions to be reduced.

Definition at line 263 of file communicator.cpp.

int Communicator::reduce_max	(	int	count,
		float *	recv_buf,
		float *	send_buf,
		int	pattern = `0`
	)

static

find a global maximum of an array of float over the communicator. pattern specifies the dimensions to be reduced.

Definition at line 269 of file communicator.cpp.

int Communicator::reduce_max	(	int	count,
		int *	recv_buf,
		int *	send_buf,
		int	pattern = `0`
	)

static

find a global maximum of an array of int over the communicator. pattern specifies the dimensions to be reduced.

Definition at line 275 of file communicator.cpp.

double Communicator::reduce_max ( double a )

static

alternative interface to reduce_max(). returns the global sum of a double over the whole communicator.

Definition at line 311 of file communicator.cpp.

float Communicator::reduce_max ( float a )

static

alternative interface to reduce_max(). returns the global sum of a float over the whole communicator.

Definition at line 341 of file communicator.cpp.

int Communicator::reduce_min	(	int	count,
		double *	recv_buf,
		double *	send_buf,
		int	pattern = `0`
	)

static

find a global minimum of an array of double over the communicator. pattern specifies the dimensions to be reduced.

Definition at line 282 of file communicator.cpp.

int Communicator::reduce_min	(	int	count,
		float *	recv_buf,
		float *	send_buf,
		int	pattern = `0`
	)

static

find a global minimum of an array of float over the communicator. pattern specifies the dimensions to be reduced.

Definition at line 288 of file communicator.cpp.

int Communicator::reduce_min	(	int	count,
		int *	recv_buf,
		int *	send_buf,
		int	pattern = `0`
	)

static

find a global minimum of an array of int over the communicator. pattern specifies the dimensions to be reduced.

Definition at line 294 of file communicator.cpp.

double Communicator::reduce_min ( double a )

static

alternative interface to reduce_min(). returns the global sum of a double over the whole communicator.

Definition at line 321 of file communicator.cpp.

float Communicator::reduce_min ( float a )

static

alternative interface to reduce_min(). returns the global sum of a float over the whole communicator.

Definition at line 351 of file communicator.cpp.

int Communicator::reduce_sum	(	int	count,
		double *	recv_buf,
		double *	send_buf,
		int	pattern = `0`
	)

static

make a global sum of an array of double over the communicator. pattern specifies the dimensions to be reduced.

Definition at line 244 of file communicator.cpp.

int Communicator::reduce_sum	(	int	count,
		float *	recv_buf,
		float *	send_buf,
		int	pattern = `0`
	)

static

make a global sum of an array of float over the communicator. pattern specifies the dimensions to be reduced.

Definition at line 250 of file communicator.cpp.

int Communicator::reduce_sum	(	int	count,
		int *	recv_buf,
		int *	send_buf,
		int	pattern = `0`
	)

static

make a global sum of an array of int over the communicator. pattern specifies the dimensions to be reduced.

Definition at line 256 of file communicator.cpp.

double Communicator::reduce_sum ( double a )

static

alternative interface to reduce_sum(). returns the global sum of a double over the whole communicator.

Definition at line 301 of file communicator.cpp.

float Communicator::reduce_sum ( float a )

static

alternative interface to reduce_sum(). returns the global sum of a float over the whole communicator.

Definition at line 331 of file communicator.cpp.

int Communicator::self ( )

static

rank within small world.

Definition at line 74 of file communicator.cpp.

int Communicator::send_1to1	(	int	count,
		double *	recv_buf,
		double *	send_buf,
		int	p_to,
		int	p_from,
		int	tag
	)

static

send array of double from rank p_from to rank p_to. communication distinguished by tag.

Definition at line 225 of file communicator.cpp.

int Communicator::send_1to1	(	int	count,
		float *	recv_buf,
		float *	send_buf,
		int	p_to,
		int	p_from,
		int	tag
	)

static

send array of float from rank p_from to rank p_to. communication distinguished by tag.

Definition at line 231 of file communicator.cpp.

int Communicator::send_1to1	(	int	count,
		int *	recv_buf,
		int *	send_buf,
		int	p_to,
		int	p_from,
		int	tag
	)

static

send array of int from rank p_from to rank p_to. communication distinguished by tag.

Definition at line 237 of file communicator.cpp.

Channel * Communicator::send_init	(	int	count,
		int	idir,
		int	ipm
	)

static

Definition at line 375 of file communicator.cpp.

Channel * Communicator::send_init	(	int	count,
		int	idir,
		int	ipm,
		void *	buf
	)

static

Definition at line 51 of file channel.cpp.

int Communicator::setup ( int ninstance = 1 )

static

setup communicator

setup communicator environment such as logical layout. called after the parameters are obtained.

Parameters

ninstance specifies multiplicity of trivial parallelism. (expects 1 at present).

Definition at line 43 of file communicator.cpp.

int Communicator::setup	(	const std::vector< int > &	lattice_size,
		std::vector< int > &	grid_size,
		int	ninstance = `1`
	)

static

setup communicator environment with lattice size and (hint of) grid size provided.

Parameters

grid_size may be incomplete, in that case it is determined from the total number of processes and the lattice size and overwritten.

Definition at line 50 of file communicator.cpp.

int Communicator::size ( )

static

size of small world.

Definition at line 81 of file communicator.cpp.

int Communicator::status ( )

static

Definition at line 368 of file communicator.cpp.

int Communicator::sync ( )

static

synchronize within small world.

Definition at line 140 of file communicator.cpp.

int Communicator::sync_usleep ( )

static

synchronize within small world. (slow but no busy wait)

Definition at line 147 of file communicator.cpp.

The documentation for this class was generated from the following files:

src/lib/Communicator/communicator.h
src/lib/Communicator/MPI/communicator.cpp
src/lib/Communicator/Single/channel.cpp
src/lib/Communicator/Single/communicator_single.cpp

Classes

Static Public Member Functions

Private Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation