template<typename Data_t, typename AArchitecture>
class TMVA::DNN::TDataLoader< Data_t, AArchitecture >

TDataLoader.

Service class managing the streaming of the training data from the input data type to the accelerator device or the CPU. A TDataLoader object manages a number of host and device buffer pairs that are used in a round-robin manner for the transfer of batches to the device.

Each TDataLoader object has an associated batch size and a number of total samples in the dataset. One epoch is the number of buffers required to transfer the complete training set. Using the begin() and end() member functions allows the user to iterate over the batches in one epoch.

Template Parameters

AData	The input data type.
AArchitecture	The achitecture class of the underlying architecture.

Definition at line 73 of file DataLoader.h.

Public Member Functions
	TDataLoader (const Data_t &data, size_t nSamples, size_t batchSize, size_t nInputFeatures, size_t nOutputFeatures, size_t nStreams=1)

	TDataLoader (const TDataLoader &)=default

	TDataLoader (TDataLoader &&)=default

BatchIterator_t	begin ()

template<>
void	CopyInput (TCpuBuffer< Real_t > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyInput (TCpuBuffer< Double_t > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyInput (TCudaHostBuffer< float > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyInput (TCpuBuffer< Double_t > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

void	CopyInput (HostBuffer_t &buffer, IndexIterator_t begin, size_t batchSize)
	Copy input matrix into the given host buffer. More...

template<>
void	CopyInput (TCudaHostBuffer< float > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyInput (TCpuBuffer< Real_t > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyInput (TCudaHostBuffer< double > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyInput (TCudaHostBuffer< double > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyOutput (TCpuBuffer< Real_t > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyOutput (TCpuBuffer< Double_t > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

void	CopyOutput (HostBuffer_t &buffer, IndexIterator_t begin, size_t batchSize)
	Copy output matrix into the given host buffer. More...

template<>
void	CopyOutput (TCudaHostBuffer< float > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyOutput (TCpuBuffer< Double_t > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyOutput (TCudaHostBuffer< float > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyOutput (TCpuBuffer< Real_t > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyOutput (TCudaHostBuffer< double > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

template<>
void	CopyOutput (TCudaHostBuffer< double > &buffer, IndexIterator_t sampleIterator, size_t batchSize)

BatchIterator_t	end ()

TBatch< AArchitecture >	GetBatch ()
	Return the next batch from the training set. More...

TDataLoader &	operator= (const TDataLoader &)=default

TDataLoader &	operator= (TDataLoader &&)=default

void	Shuffle ()
	Shuffle the order of the samples in the batch. More...

Private Types
using	BatchIterator_t = TBatchIterator< Data_t, AArchitecture >

using	DeviceBuffer_t = typename AArchitecture::DeviceBuffer_t

using	HostBuffer_t = typename AArchitecture::HostBuffer_t

using	Matrix_t = typename AArchitecture::Matrix_t

Private Attributes
size_t	fBatchIndex

size_t	fBatchSize

const Data_t &	fData

std::vector< DeviceBuffer_t >	fDeviceBuffers

std::vector< HostBuffer_t >	fHostBuffers

size_t	fNInputFeatures

size_t	fNOutputFeatures

size_t	fNSamples

size_t	fNStreams
	Number of buffer pairs. More...

std::vector< size_t >	fSampleIndices
	Ordering of the samples in the epoch. More...

#include <TMVA/DNN/DataLoader.h>

Member Typedef Documentation

◆ BatchIterator_t

template<typename Data_t, typename AArchitecture>

using TMVA::DNN::TDataLoader< Data_t, AArchitecture >::BatchIterator_t = TBatchIterator<Data_t, AArchitecture>

private

Definition at line 129 of file DataLoader.h.

◆ DeviceBuffer_t

template<typename Data_t, typename AArchitecture>

using TMVA::DNN::TDataLoader< Data_t, AArchitecture >::DeviceBuffer_t = typename AArchitecture::DeviceBuffer_t

private

Definition at line 127 of file DataLoader.h.

◆ HostBuffer_t

template<typename Data_t, typename AArchitecture>

using TMVA::DNN::TDataLoader< Data_t, AArchitecture >::HostBuffer_t = typename AArchitecture::HostBuffer_t

private

Definition at line 126 of file DataLoader.h.

◆ Matrix_t

template<typename Data_t, typename AArchitecture>

using TMVA::DNN::TDataLoader< Data_t, AArchitecture >::Matrix_t = typename AArchitecture::Matrix_t

private

Definition at line 128 of file DataLoader.h.

Constructor & Destructor Documentation

◆ TDataLoader() [1/3]

template<typename Data_t , typename AArchitecture >

TMVA::DNN::TDataLoader< Data_t, AArchitecture >::TDataLoader	(	const Data_t &	data,
		size_t	nSamples,
		size_t	batchSize,
		size_t	nInputFeatures,
		size_t	nOutputFeatures,
		size_t	nStreams = `1`
	)

Definition at line 193 of file DataLoader.h.

◆ TDataLoader() [2/3]

template<typename Data_t, typename AArchitecture>

TMVA::DNN::TDataLoader< Data_t, AArchitecture >::TDataLoader ( const TDataLoader< Data_t, AArchitecture > & )

default

◆ TDataLoader() [3/3]

template<typename Data_t, typename AArchitecture>

TMVA::DNN::TDataLoader< Data_t, AArchitecture >::TDataLoader ( TDataLoader< Data_t, AArchitecture > && )

default

Member Function Documentation

◆ begin()

template<typename Data_t, typename AArchitecture>

BatchIterator_t TMVA::DNN::TDataLoader< Data_t, AArchitecture >::begin ( )

inline

Definition at line 161 of file DataLoader.h.

◆ CopyInput() [1/9]

template<>

void TMVA::DNN::TDataLoader< MatrixInput_t, TCpu< Real_t > >::CopyInput	(	TCpuBuffer< Real_t > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 72 of file CpuBuffer.cxx.

◆ CopyInput() [2/9]

template<>

void TMVA::DNN::TDataLoader< MatrixInput_t, TCpu< Double_t > >::CopyInput	(	TCpuBuffer< Double_t > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 112 of file CpuBuffer.cxx.

◆ CopyInput() [3/9]

template<>

void TMVA::DNN::TDataLoader< MatrixInput_t, TCuda< float > >::CopyInput	(	TCudaHostBuffer< float > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 145 of file CudaBuffers.cxx.

◆ CopyInput() [4/9]

template<>

void TMVA::DNN::TDataLoader< TMVAInput_t, TCpu< Double_t > >::CopyInput	(	TCpuBuffer< Double_t > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 152 of file CpuBuffer.cxx.

◆ CopyInput() [5/9]

template<typename Data_t, typename AArchitecture>

void TMVA::DNN::TDataLoader< Data_t, AArchitecture >::CopyInput	(	HostBuffer_t &	buffer,
		IndexIterator_t	begin,
		size_t	batchSize
	)

Copy input matrix into the given host buffer.

Function to be specialized by the architecture-specific backend.

◆ CopyInput() [6/9]

template<>

void TMVA::DNN::TDataLoader< TMVAInput_t, TCuda< float > >::CopyInput	(	TCudaHostBuffer< float > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 185 of file CudaBuffers.cxx.

◆ CopyInput() [7/9]

template<>

void TMVA::DNN::TDataLoader< TMVAInput_t, TCpu< Real_t > >::CopyInput	(	TCpuBuffer< Real_t > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 211 of file CpuBuffer.cxx.

◆ CopyInput() [8/9]

template<>

void TMVA::DNN::TDataLoader< MatrixInput_t, TCuda< double > >::CopyInput	(	TCudaHostBuffer< double > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 244 of file CudaBuffers.cxx.

◆ CopyInput() [9/9]

template<>

void TMVA::DNN::TDataLoader< TMVAInput_t, TCuda< double > >::CopyInput	(	TCudaHostBuffer< double > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 284 of file CudaBuffers.cxx.

◆ CopyOutput() [1/9]

template<>

void TMVA::DNN::TDataLoader< MatrixInput_t, TCpu< Real_t > >::CopyOutput	(	TCpuBuffer< Real_t > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 92 of file CpuBuffer.cxx.

◆ CopyOutput() [2/9]

template<>

void TMVA::DNN::TDataLoader< MatrixInput_t, TCpu< Double_t > >::CopyOutput	(	TCpuBuffer< Double_t > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 132 of file CpuBuffer.cxx.

◆ CopyOutput() [3/9]

template<typename Data_t, typename AArchitecture>

void TMVA::DNN::TDataLoader< Data_t, AArchitecture >::CopyOutput	(	HostBuffer_t &	buffer,
		IndexIterator_t	begin,
		size_t	batchSize
	)

Copy output matrix into the given host buffer.

Function to be specialized by the architecture-spcific backend.

◆ CopyOutput() [4/9]

template<>

void TMVA::DNN::TDataLoader< MatrixInput_t, TCuda< float > >::CopyOutput	(	TCudaHostBuffer< float > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 165 of file CudaBuffers.cxx.

◆ CopyOutput() [5/9]

template<>

void TMVA::DNN::TDataLoader< TMVAInput_t, TCpu< Double_t > >::CopyOutput	(	TCpuBuffer< Double_t > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 174 of file CpuBuffer.cxx.

◆ CopyOutput() [6/9]

template<>

void TMVA::DNN::TDataLoader< TMVAInput_t, TCuda< float > >::CopyOutput	(	TCudaHostBuffer< float > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 207 of file CudaBuffers.cxx.

◆ CopyOutput() [7/9]

template<>

void TMVA::DNN::TDataLoader< TMVAInput_t, TCpu< Real_t > >::CopyOutput	(	TCpuBuffer< Real_t > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 233 of file CpuBuffer.cxx.

◆ CopyOutput() [8/9]

template<>

void TMVA::DNN::TDataLoader< MatrixInput_t, TCuda< double > >::CopyOutput	(	TCudaHostBuffer< double > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 264 of file CudaBuffers.cxx.

◆ CopyOutput() [9/9]

template<>

void TMVA::DNN::TDataLoader< TMVAInput_t, TCuda< double > >::CopyOutput	(	TCudaHostBuffer< double > &	buffer,
		IndexIterator_t	sampleIterator,
		size_t	batchSize
	)

Definition at line 306 of file CudaBuffers.cxx.

◆ end()

template<typename Data_t, typename AArchitecture>

BatchIterator_t TMVA::DNN::TDataLoader< Data_t, AArchitecture >::end ( )

inline

Definition at line 162 of file DataLoader.h.

◆ GetBatch()

template<typename Data_t , typename AArchitecture >

TBatch< AArchitecture > TMVA::DNN::TDataLoader< Data_t, AArchitecture >::GetBatch ( )

Return the next batch from the training set.

The TDataLoader object keeps an internal counter that cycles over the batches in the training set.

Definition at line 218 of file DataLoader.h.

◆ operator=() [1/2]

template<typename Data_t, typename AArchitecture>

TDataLoader& TMVA::DNN::TDataLoader< Data_t, AArchitecture >::operator= ( const TDataLoader< Data_t, AArchitecture > & )

default

◆ operator=() [2/2]

template<typename Data_t, typename AArchitecture>

TDataLoader& TMVA::DNN::TDataLoader< Data_t, AArchitecture >::operator= ( TDataLoader< Data_t, AArchitecture > && )

default

◆ Shuffle()

template<typename Data_t , typename AArchitecture >

void TMVA::DNN::TDataLoader< Data_t, AArchitecture >::Shuffle ( )

Shuffle the order of the samples in the batch.

The shuffling is indirect, i.e. only the indices are shuffled. No input data is moved by this routine.

Definition at line 253 of file DataLoader.h.

Member Data Documentation

◆ fBatchIndex

template<typename Data_t, typename AArchitecture>

size_t TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fBatchIndex

private

Definition at line 137 of file DataLoader.h.

◆ fBatchSize

template<typename Data_t, typename AArchitecture>

size_t TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fBatchSize

private

Definition at line 134 of file DataLoader.h.

◆ fData

template<typename Data_t, typename AArchitecture>

const Data_t& TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fData

private

Definition at line 131 of file DataLoader.h.

◆ fDeviceBuffers

template<typename Data_t, typename AArchitecture>

std::vector<DeviceBuffer_t> TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fDeviceBuffers

private

Definition at line 140 of file DataLoader.h.

◆ fHostBuffers

template<typename Data_t, typename AArchitecture>

std::vector<HostBuffer_t> TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fHostBuffers

private

Definition at line 141 of file DataLoader.h.

◆ fNInputFeatures

template<typename Data_t, typename AArchitecture>

size_t TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fNInputFeatures

private

Definition at line 135 of file DataLoader.h.

◆ fNOutputFeatures

template<typename Data_t, typename AArchitecture>

size_t TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fNOutputFeatures

private

Definition at line 136 of file DataLoader.h.

◆ fNSamples

template<typename Data_t, typename AArchitecture>

size_t TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fNSamples

private

Definition at line 133 of file DataLoader.h.

◆ fNStreams

template<typename Data_t, typename AArchitecture>

size_t TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fNStreams

private

Number of buffer pairs.

Definition at line 139 of file DataLoader.h.

◆ fSampleIndices

template<typename Data_t, typename AArchitecture>

std::vector<size_t> TMVA::DNN::TDataLoader< Data_t, AArchitecture >::fSampleIndices

private

Ordering of the samples in the epoch.

Definition at line 143 of file DataLoader.h.

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

tmva/tmva/inc/TMVA/DNN/DataLoader.h

template<typename Data_t, typename AArchitecture> class TMVA::DNN::TDataLoader< Data_t, AArchitecture >

Public Member Functions

Private Types

Private Attributes

Member Typedef Documentation

◆ BatchIterator_t

◆ DeviceBuffer_t

◆ HostBuffer_t

◆ Matrix_t

Constructor & Destructor Documentation

◆ TDataLoader() [1/3]

◆ TDataLoader() [2/3]

◆ TDataLoader() [3/3]

Member Function Documentation

◆ begin()

◆ CopyInput() [1/9]

◆ CopyInput() [2/9]

◆ CopyInput() [3/9]

◆ CopyInput() [4/9]

◆ CopyInput() [5/9]

◆ CopyInput() [6/9]

◆ CopyInput() [7/9]

◆ CopyInput() [8/9]

◆ CopyInput() [9/9]

◆ CopyOutput() [1/9]

◆ CopyOutput() [2/9]

◆ CopyOutput() [3/9]

◆ CopyOutput() [4/9]

◆ CopyOutput() [5/9]

◆ CopyOutput() [6/9]

◆ CopyOutput() [7/9]

◆ CopyOutput() [8/9]

◆ CopyOutput() [9/9]

◆ end()

◆ GetBatch()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ Shuffle()

Member Data Documentation

◆ fBatchIndex

◆ fBatchSize

◆ fData

◆ fDeviceBuffers

◆ fHostBuffers

◆ fNInputFeatures

◆ fNOutputFeatures

◆ fNSamples

◆ fNStreams

◆ fSampleIndices

template<typename Data_t, typename AArchitecture>
class TMVA::DNN::TDataLoader< Data_t, AArchitecture >