cub::DispatchReduce< InputIteratorT, OutputIteratorT, OffsetT, ReductionOpT > Struct Template Reference

< Binary reduction functor type having member T operator()(const T &a, const T &b) More...

Detailed Description

template<typename InputIteratorT, typename OutputIteratorT, typename OffsetT, typename ReductionOpT>
struct cub::DispatchReduce< InputIteratorT, OutputIteratorT, OffsetT, ReductionOpT >

< Binary reduction functor type having member T operator()(const T &a, const T &b)

Utility class for dispatching the appropriately-tuned kernels for device-wide reduction

Definition at line 359 of file dispatch_reduce.cuh.

Inheritance diagram for cub::DispatchReduce< InputIteratorT, OutputIteratorT, OffsetT, ReductionOpT >:

Public Types
typedef If<(Equals< typename std::iterator_traits< OutputIteratorT >::value_type, void >::VALUE), typename std::iterator_traits< InputIteratorT >::value_type, typename std::iterator_traits< OutputIteratorT >::value_type >::Type	OutputT
Public Types inherited from cub::DeviceReducePolicy< If<(Equals< std::iterator_traits< OutputIteratorT >::value_type, void >::VALUE), std::iterator_traits< InputIteratorT >::value_type, std::iterator_traits< OutputIteratorT >::value_type >::Type, OffsetT, ReductionOpT >
typedef Policy600	MaxPolicy
	MaxPolicy.

Public Member Functions
CUB_RUNTIME_FUNCTION __forceinline__	DispatchReduce (void *d_temp_storage, size_t &temp_storage_bytes, InputIteratorT d_in, OutputIteratorT d_out, OffsetT num_items, ReductionOpT reduction_op, OutputT init, cudaStream_t stream, bool debug_synchronous, int ptx_version)
	Constructor.
template<typename ActivePolicyT , typename SingleTileKernelT >
CUB_RUNTIME_FUNCTION __forceinline__ cudaError_t	InvokeSingleTile (SingleTileKernelT single_tile_kernel)
	Invoke a single block block to reduce in-core. More...
template<typename ActivePolicyT , typename ReduceKernelT , typename SingleTileKernelT >
CUB_RUNTIME_FUNCTION __forceinline__ cudaError_t	InvokePasses (ReduceKernelT reduce_kernel, SingleTileKernelT single_tile_kernel)
	Invoke two-passes to reduce. More...
template<typename ActivePolicyT >
CUB_RUNTIME_FUNCTION __forceinline__ cudaError_t	Invoke ()
	Invocation.

Static Public Member Functions
CUB_RUNTIME_FUNCTION static __forceinline__ cudaError_t	Dispatch (void *d_temp_storage, size_t &temp_storage_bytes, InputIteratorT d_in, OutputIteratorT d_out, OffsetT num_items, ReductionOpT reduction_op, OutputT init, cudaStream_t stream, bool debug_synchronous)

Data Fields
void *	d_temp_storage
	[in] Device-accessible allocation of temporary storage. When NULL, the required allocation size is written to temp_storage_bytes and no work is done.
size_t &	temp_storage_bytes
	[in,out] Reference to size in bytes of d_temp_storage allocation
InputIteratorT	d_in
	[in] Pointer to the input sequence of data items
OutputIteratorT	d_out
	[out] Pointer to the output aggregate
OffsetT	num_items
	[in] Total number of input items (i.e., length of d_in)
ReductionOpT	reduction_op
	[in] Binary reduction functor
OutputT	init
	[in] The initial value of the reduction
cudaStream_t	stream
	[in] CUDA stream to launch kernels within. Default is stream0.
bool	debug_synchronous
	[in] Whether or not to synchronize the stream after every kernel launch to check for errors. Also causes launch configurations to be printed to the console. Default is false.
int	ptx_version
	[in] PTX version

Member Function Documentation

Dispatch()

template<typename InputIteratorT , typename OutputIteratorT , typename OffsetT , typename ReductionOpT >

CUB_RUNTIME_FUNCTION static __forceinline__ cudaError_t cub::DispatchReduce< InputIteratorT, OutputIteratorT, OffsetT, ReductionOpT >::Dispatch ( void *  d_temp_storage, size_t &  temp_storage_bytes, InputIteratorT  d_in, OutputIteratorT  d_out, OffsetT  num_items, ReductionOpT  reduction_op, OutputT  init, cudaStream_t  stream, bool  debug_synchronous  )

inlinestatic

Internal dispatch routine for computing a device-wide reduction

Parameters

[in]	d_temp_storage	Device-accessible allocation of temporary storage. When NULL, the required allocation size is written to temp_storage_bytes and no work is done.
[in,out]	temp_storage_bytes	Reference to size in bytes of d_temp_storage allocation
[in]	d_in	Pointer to the input sequence of data items
[out]	d_out	Pointer to the output aggregate
[in]	num_items	Total number of input items (i.e., length of d_in)
[in]	reduction_op	Binary reduction functor
[in]	init	The initial value of the reduction
[in]	stream	[optional] CUDA stream to launch kernels within. Default is stream0.
[in]	debug_synchronous	[optional] Whether or not to synchronize the stream after every kernel launch to check for errors. Also causes launch configurations to be printed to the console. Default is false.

Definition at line 631 of file dispatch_reduce.cuh.

InvokePasses()

template<typename InputIteratorT , typename OutputIteratorT , typename OffsetT , typename ReductionOpT >

template<typename ActivePolicyT , typename ReduceKernelT , typename SingleTileKernelT >

CUB_RUNTIME_FUNCTION __forceinline__ cudaError_t cub::DispatchReduce< InputIteratorT, OutputIteratorT, OffsetT, ReductionOpT >::InvokePasses ( ReduceKernelT  reduce_kernel, SingleTileKernelT  single_tile_kernel  )

inline

Invoke two-passes to reduce.

< Function type of cub::DeviceReduceSingleTileKernel

Parameters

[in]	reduce_kernel	Kernel function pointer to parameterization of cub::DeviceReduceKernel
[in]	single_tile_kernel	Kernel function pointer to parameterization of cub::DeviceReduceSingleTileKernel

Definition at line 489 of file dispatch_reduce.cuh.

InvokeSingleTile()

template<typename InputIteratorT , typename OutputIteratorT , typename OffsetT , typename ReductionOpT >

template<typename ActivePolicyT , typename SingleTileKernelT >

CUB_RUNTIME_FUNCTION __forceinline__ cudaError_t cub::DispatchReduce< InputIteratorT, OutputIteratorT, OffsetT, ReductionOpT >::InvokeSingleTile ( SingleTileKernelT  single_tile_kernel )

inline

Invoke a single block block to reduce in-core.

< Function type of cub::DeviceReduceSingleTileKernel

Parameters

[in]

single_tile_kernel

Kernel function pointer to parameterization of cub::DeviceReduceSingleTileKernel

Definition at line 432 of file dispatch_reduce.cuh.

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

• openfpm_data/src/util/cuda/cub_old/device/dispatch/dispatch_reduce.cuh