global_sum.h File Reference

Functions for global reduction operations across nodes. More...

#include "hr_complex.h"
#include "spinor_field.h"

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Functions
void	global_sum (double *d, int n)
	Collects sum results from the local lattices and sums over all nodes (double).
void	global_sum_int (int *d, int n)
	Collects sum results from the local lattices and sums over all nodes (integer).
void	global_max (double *d, int n)
	Finds maximum across nodes after finding the local maximum.
void	global_max_flt (float *d, int n)
void	global_min (double *d, int n)
	Finds minimum across nodes after finding the local minimum.
void	bcast (double *d, int n)
	FIXME: add docs.
void	bcast_int (int *i, int n)
	FIXME: add docs.
int	global_sum_gpu_int (int *vector, int size)
	Sums across GPU nodes after finding the local sum (integer)
float	global_sum_gpu_float (float *vector, int size)
	Sums across GPU nodes after finding the local sum (single precision reals)
double	global_sum_gpu_double (double *vector, int size)
	Sums across GPU nodes after finding the local sum (double precision reals)
hr_complex_flt	global_sum_gpu_complex_flt (hr_complex_flt *vector, int size)
	Sums across GPU nodes after finding the local sum (single precision complex)
hr_complex	global_sum_gpu_complex (hr_complex *vector, int size)
	Sums across GPU nodes after finding the local sum (double precision complex)
int	global_max_gpu_int (int *vector, int size)
	GPU max reduction (integer)
float	global_max_gpu_float (float *vector, int size)
	GPU max reduction (single precision reals)
double	global_max_gpu_double (double *vector, int size)
	Sums across GPU nodes after finding the local sum (double precision reals)

Detailed Description

Functions for global reduction operations across nodes.

Headerfile for:

• global_sum.c
• global_sum_gpu.c

Function Documentation

bcast()

void bcast	(	double *	d,
		int	n )

FIXME: add docs.

Parameters

d
n

bcast_int()

void bcast_int	(	int *	i,
		int	n )

FIXME: add docs.

Parameters

i
n

global_max()

void global_max	(	double *	d,
		int	n )

Finds maximum across nodes after finding the local maximum.

Parameters

d	Pointer that contains the local result
n	Size of the array

global_max_gpu_double()

double global_max_gpu_double	(	double *	vector,
		int	size )

Sums across GPU nodes after finding the local sum (double precision reals)

Parameters

vector	Vector with local results
size	Size of vector

Returns

double Highest double in vector

global_max_gpu_float()

float global_max_gpu_float	(	float *	vector,
		int	size )

GPU max reduction (single precision reals)

Parameters

vector	Vector with local results
size	Size of vector

Returns

float Highest float in vector

global_max_gpu_int()

int global_max_gpu_int	(	int *	vector,
		int	size )

GPU max reduction (integer)

Parameters

vector	Vector with local results
size	Size of vector

Returns

int Highest integer in vector

global_min()

void global_min	(	double *	d,
		int	n )

Finds minimum across nodes after finding the local minimum.

Parameters

d	Pointer that contains the local result
n	Size of the array

global_sum()

void global_sum	(	double *	d,
		int	n )

Collects sum results from the local lattices and sums over all nodes (double).

Parameters

d	Pointer that contains the local result
n	Size of the array

global_sum_gpu_complex()

hr_complex global_sum_gpu_complex	(	hr_complex *	vector,
		int	size )

Sums across GPU nodes after finding the local sum (double precision complex)

Parameters

vector	Vector with local results
size	Size of vector

Returns

hr_complex Result of sum

global_sum_gpu_complex_flt()

hr_complex_flt global_sum_gpu_complex_flt	(	hr_complex_flt *	vector,
		int	size )

Sums across GPU nodes after finding the local sum (single precision complex)

Parameters

vector	Vector with local results
size	Size of vector

Returns

hr_complex_flt Result of sum

global_sum_gpu_double()

double global_sum_gpu_double	(	double *	vector,
		int	size )

Sums across GPU nodes after finding the local sum (double precision reals)

Parameters

vector	Vector with local results
size	Size of vector

Returns

double Result of sum

global_sum_gpu_float()

float global_sum_gpu_float	(	float *	vector,
		int	size )

Sums across GPU nodes after finding the local sum (single precision reals)

Parameters

vector	Vector with local results
size	Size of vector

Returns

float Result of sum

global_sum_gpu_int()

int global_sum_gpu_int	(	int *	vector,
		int	size )

Sums across GPU nodes after finding the local sum (integer)

Parameters

vector	Vector with local results
size	Size of vector

Returns

int Result of sum

global_sum_int()

void global_sum_int	(	int *	d,
		int	n )

Collects sum results from the local lattices and sums over all nodes (integer).

Parameters

d	Pointer that contains the local result
n	Size of the array