Proto::Reduction< T, OP, MEM > Class Template Reference

#include <Proto_Reduction.H>

Public Member Functions
	Reduction ()
	Reduction (bool a_dynamic)
	Constructor. More...
	~Reduction ()
	Destructor. More...
T	fetchLocal ()
	Get Reduction. More...
T	fetch ()
	Get Reduction. More...
void	reduce (const T *a_data, const size_t a_size)
	Compute Reduction. More...
void	reset ()
	Reset Reduction. More...

Static Public Member Functions
static ACCEL_DECORATION T	init ()
	Initialize Value. More...
static ACCEL_DECORATION void	update (T &a_v1, const T a_v2)
	Update Value. More...

Private Attributes
T *	m_hostTotal
T *	m_hostTemp

Constructor & Destructor Documentation

Reduction() [1/2]

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

Proto::Reduction< T, OP, MEM >::Reduction ( )

inline

References ACCEL_DECORATION, Proto::Reduction< T, OP, MEM >::fetch(), Proto::Reduction< T, OP, MEM >::fetchLocal(), Proto::Reduction< T, OP, MEM >::init(), Proto::Reduction< T, OP, MEM >::reduce(), Proto::Reduction< T, OP, MEM >::reset(), and Proto::Reduction< T, OP, MEM >::update().

Reduction() [2/2]

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

Proto::Reduction< T, OP, MEM >::Reduction

(

bool

a_dynamic

)

Constructor.

Creates a Reduction operator with or without dynamic block allocation. If a_dynamic==true, the minimum number of GPU blocks needed to compute a reduction will be determined on each call to Reduction::reduce. Otherwise, the maximum bumber of blocks available on the device will be used instead.

Parameters

a_dynamic

Determine number of GPU blocks dynamically?

~Reduction()

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

Proto::Reduction< T, OP, MEM >::~Reduction

(

)

Destructor.

Member Function Documentation

init()

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

static ACCEL_DECORATION T Proto::Reduction< T, OP, MEM >::init ( )

static

Initialize Value.

Initialize a value based on OP. Minima Ops: a_value -> max value of T Maxima Ops: a_value -> min value of T Sum Ops: a_value -> 0

Referenced by Proto::initKernel(), and Proto::Reduction< T, OP, MEM >::Reduction().

update()

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

static ACCEL_DECORATION void Proto::Reduction< T, OP, MEM >::update ( T &  a_v1, const T  a_v2  )

static

Update Value.

Computed an updated value by executing OP on two values.

Parameters

a_v1	A value compared with OP
a_v2	A value compared with OP

Referenced by Proto::initKernel(), and Proto::Reduction< T, OP, MEM >::Reduction().

fetchLocal()

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

T Proto::Reduction< T, OP, MEM >::fetchLocal

(

)

Get Reduction.

Returns the computed reduction, waiting for kernel completion on GPUs. The result is local to a single MPI process if MPI is enabled.

Referenced by Proto::Reduction< T, OP, MEM >::Reduction().

fetch()

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

T Proto::Reduction< T, OP, MEM >::fetch

(

)

Get Reduction.

Returns the computed reduction, waiting for kernel completion on GPUs. If MPI is enabled, the result is communicated to all processes.

Referenced by Proto::Reduction< T, OP, MEM >::Reduction().

reduce()

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

void Proto::Reduction< T, OP, MEM >::reduce	(	const T *	a_data,
		const size_t	a_size
	)

Compute Reduction.

Calculates a reduction on the buffer a_data of size a_size. Here a_size is the number of elements of a_data. Subsequent calls to reduce will update the reduction until Reduction::reset() is called.

Parameters

a_data	A buffer of data.
a_size	The number of elements in a_data.

Referenced by Proto::Reduction< T, OP, MEM >::Reduction().

reset()

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

void Proto::Reduction< T, OP, MEM >::reset

(

)

Reset Reduction.

Reinitializes the reduction.

Referenced by Proto::Reduction< T, OP, MEM >::Reduction().

Member Data Documentation

m_hostTotal

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

T* Proto::Reduction< T, OP, MEM >::m_hostTotal

private

m_hostTemp

template<typename T, Operation OP, MemType MEM = MEMTYPE_DEFAULT>

T* Proto::Reduction< T, OP, MEM >::m_hostTemp

private

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

• Proto_Reduction.H