comm_quda.h File Reference

Go to the source code of this file.

Typedefs
typedef struct MsgHandle_s	MsgHandle
typedef struct Topology_s	Topology
typedef int(*	QudaCommsMap )(const int *coords, void *fdata)

Functions
char *	comm_hostname (void)
double	comm_drand (void)
Topology *	comm_create_topology (int ndim, const int *dims, QudaCommsMap rank_from_coords, void *map_data)
void	comm_destroy_topology (Topology *topo)
int	comm_ndim (const Topology *topo)
const int *	comm_dims (const Topology *topo)
const int *	comm_coords (const Topology *topo)
const int *	comm_coords_from_rank (const Topology *topo, int rank)
int	comm_rank_from_coords (const Topology *topo, const int *coords)
int	comm_rank_displaced (const Topology *topo, const int displacement[])
void	comm_set_default_topology (Topology *topo)
Topology *	comm_default_topology (void)
int	comm_dim (int dim)
int	comm_coord (int dim)
MsgHandle *	comm_declare_send_relative (void *buffer, int dim, int dir, size_t nbytes)
MsgHandle *	comm_declare_receive_relative (void *buffer, int dim, int dir, size_t nbytes)
void	comm_finalize (void)
void	comm_dim_partitioned_set (int dim)
int	comm_dim_partitioned (int dim)
void	comm_init (int ndim, const int *dims, QudaCommsMap rank_from_coords, void *map_data)
int	comm_rank (void)
int	comm_size (void)
int	comm_gpuid (void)
MsgHandle *	comm_declare_send_displaced (void *buffer, const int displacement[], size_t nbytes)
MsgHandle *	comm_declare_receive_displaced (void *buffer, const int displacement[], size_t nbytes)
void	comm_free (MsgHandle *mh)
void	comm_start (MsgHandle *mh)
void	comm_wait (MsgHandle *mh)
int	comm_query (MsgHandle *mh)
void	comm_allreduce (double *data)
void	comm_allreduce_max (double *data)
void	comm_allreduce_array (double *data, size_t size)
void	comm_allreduce_int (int *data)
void	comm_broadcast (void *data, size_t nbytes)
void	comm_barrier (void)
void	comm_abort (int status)

Typedef Documentation

typedef struct MsgHandle_s MsgHandle

Definition at line 8 of file comm_quda.h.

typedef int(* QudaCommsMap)(const int *coords, void *fdata)

Definition at line 12 of file comm_quda.h.

typedef struct Topology_s Topology

Definition at line 9 of file comm_quda.h.

Function Documentation

void comm_abort

(

int

status

)

Definition at line 204 of file comm_mpi.cpp.

void comm_allreduce

(

double *

data

)

Definition at line 159 of file comm_mpi.cpp.

void comm_allreduce_array	(	double *	data,
		size_t	size
	)

Definition at line 175 of file comm_mpi.cpp.

void comm_allreduce_int

(

int *

data

)

Definition at line 183 of file comm_mpi.cpp.

void comm_allreduce_max

(

double *

data

)

Definition at line 167 of file comm_mpi.cpp.

void comm_barrier

(

void

)

Definition at line 198 of file comm_mpi.cpp.

void comm_broadcast	(	void *	data,
		size_t	nbytes
	)

broadcast from rank 0

Definition at line 192 of file comm_mpi.cpp.

int comm_coord

(

int

dim

)

Definition at line 219 of file comm_common.cpp.

const int* comm_coords

(

const Topology *

topo

)

Definition at line 158 of file comm_common.cpp.

const int* comm_coords_from_rank	(	const Topology *	topo,
		int	rank
	)

Definition at line 164 of file comm_common.cpp.

Topology* comm_create_topology	(	int	ndim,
		const int *	dims,
		QudaCommsMap	rank_from_coords,
		void *	map_data
	)

Definition at line 93 of file comm_common.cpp.

MsgHandle* comm_declare_receive_displaced	(	void *	buffer,
		const int	displacement[],
		size_t	nbytes
	)

Declare a message handle for receiving from a node displaced in (x,y,z,t) according to "displacement"

Definition at line 119 of file comm_mpi.cpp.

MsgHandle* comm_declare_receive_relative	(	void *	buffer,
		int	dim,
		int	dir,
		size_t	nbytes
	)

Receive from the "dir" direction in the "dim" dimension

Definition at line 241 of file comm_common.cpp.

MsgHandle* comm_declare_send_displaced	(	void *	buffer,
		const int	displacement[],
		size_t	nbytes
	)

Declare a message handle for sending to a node displaced in (x,y,z,t) according to "displacement"

Definition at line 103 of file comm_mpi.cpp.

MsgHandle* comm_declare_send_relative	(	void *	buffer,
		int	dim,
		int	dir,
		size_t	nbytes
	)

Send to the "dir" direction in the "dim" dimension

Definition at line 229 of file comm_common.cpp.

Topology* comm_default_topology

(

void

)

Definition at line 203 of file comm_common.cpp.

void comm_destroy_topology

(

Topology *

topo

)

Definition at line 138 of file comm_common.cpp.

int comm_dim

(

int

dim

)

Definition at line 212 of file comm_common.cpp.

int comm_dim_partitioned

(

int

dim

)

Definition at line 266 of file comm_common.cpp.

void comm_dim_partitioned_set

(

int

dim

)

Definition at line 260 of file comm_common.cpp.

const int* comm_dims

(

const Topology *

topo

)

Definition at line 152 of file comm_common.cpp.

double comm_drand

(

void

)

We provide our own random number generator to avoid re-seeding rand(), which might also be used by the calling application. This is a clone of rand48(), provided by stdlib.h on UNIX.

Returns

a random double in the interval [0,1)

Definition at line 81 of file comm_common.cpp.

void comm_finalize

(

void

)

Definition at line 250 of file comm_common.cpp.

void comm_free

(

MsgHandle *

mh

)

Definition at line 132 of file comm_mpi.cpp.

int comm_gpuid

(

void

)

Definition at line 94 of file comm_mpi.cpp.

char* comm_hostname

(

void

)

Definition at line 57 of file comm_common.cpp.

void comm_init	(	int	ndim,
		const int *	dims,
		QudaCommsMap	rank_from_coords,
		void *	map_data
	)

Dummy communications layer for single-GPU backend.

Definition at line 32 of file comm_mpi.cpp.

int comm_ndim

(

const Topology *

topo

)

Definition at line 146 of file comm_common.cpp.

int comm_query

(

MsgHandle *

mh

)

Definition at line 150 of file comm_mpi.cpp.

int comm_rank

(

void

)

Definition at line 82 of file comm_mpi.cpp.

int comm_rank_displaced	(	const Topology *	topo,
		const int	displacement[]
	)

Definition at line 181 of file comm_common.cpp.

int comm_rank_from_coords	(	const Topology *	topo,
		const int *	coords
	)

Definition at line 170 of file comm_common.cpp.

void comm_set_default_topology

(

Topology *

topo

)

Definition at line 197 of file comm_common.cpp.

int comm_size

(

void

)

Definition at line 88 of file comm_mpi.cpp.

void comm_start

(

MsgHandle *

mh

)

Definition at line 138 of file comm_mpi.cpp.

void comm_wait

(

MsgHandle *

mh

)

Definition at line 144 of file comm_mpi.cpp.