xgboost::SparsePage Class Reference

In-memory storage unit of sparse batch, stored in CSR format. More...

#include <data.h>

Inheritance diagram for xgboost::SparsePage:

Collaboration diagram for xgboost::SparsePage:

Public Types
using	Inst = common::Span< Entry const >
	an instance of sparse vector in the batch More...

Public Member Functions
HostSparsePageView	GetView () const
	SparsePage ()
	constructor More...
	SparsePage (SparsePage const &that)=delete
	SparsePage (SparsePage &&that)=default
SparsePage &	operator= (SparsePage const &that)=delete
SparsePage &	operator= (SparsePage &&that)=default
virtual	~SparsePage ()=default
size_t	Size () const
size_t	MemCostBytes () const
void	Clear ()
	clear the page More...
void	SetBaseRowId (size_t row_id)
	Set the base row id for this page. More...
SparsePage	GetTranspose (int num_columns, int32_t n_threads) const
void	SortIndices (int32_t n_threads)
	Sort the column index. More...
bool	IsIndicesSorted (int32_t n_threads) const
	Check wether the column index is sorted. More...
void	Reindex (uint64_t feature_offset, int32_t n_threads)
	Reindex the column index with an offset. More...
void	SortRows (int32_t n_threads)
template<typename AdapterBatchT >
uint64_t	Push (const AdapterBatchT &batch, float missing, int nthread)
	Pushes external data batch onto this page. More...
void	Push (const SparsePage &batch)
	Push a sparse page. More...
void	PushCSC (const SparsePage &batch)
	Push a SparsePage stored in CSC format. More...

Public Attributes
HostDeviceVector< bst_idx_t >	offset
HostDeviceVector< Entry >	data
	the data of the segments More...
size_t	base_rowid {0}

Detailed Description

In-memory storage unit of sparse batch, stored in CSR format.

Member Typedef Documentation

Inst

using xgboost::SparsePage::Inst = common::Span<Entry const>

an instance of sparse vector in the batch

Constructor & Destructor Documentation

SparsePage() [1/3]

xgboost::SparsePage::SparsePage ( )

inline

constructor

SparsePage() [2/3]

xgboost::SparsePage::SparsePage ( SparsePage const &  that )

delete

SparsePage() [3/3]

xgboost::SparsePage::SparsePage ( SparsePage &&  that )

default

~SparsePage()

virtual xgboost::SparsePage::~SparsePage ( )

virtualdefault

Member Function Documentation

Clear()

void xgboost::SparsePage::Clear ( )

inline

clear the page

GetTranspose()

SparsePage xgboost::SparsePage::GetTranspose	(	int	num_columns,
		int32_t	n_threads
	)		const

GetView()

HostSparsePageView xgboost::SparsePage::GetView ( ) const

inline

IsIndicesSorted()

bool xgboost::SparsePage::IsIndicesSorted

(

int32_t

n_threads

)

const

Check wether the column index is sorted.

MemCostBytes()

size_t xgboost::SparsePage::MemCostBytes ( ) const

inline

Returns

estimation of memory cost of this page

operator=() [1/2]

SparsePage& xgboost::SparsePage::operator= ( SparsePage &&  that )

default

operator=() [2/2]

SparsePage& xgboost::SparsePage::operator= ( SparsePage const &  that )

delete

Push() [1/2]

template<typename AdapterBatchT >

uint64_t xgboost::SparsePage::Push	(	const AdapterBatchT &	batch,
		float	missing,
		int	nthread
	)

Pushes external data batch onto this page.

Template Parameters

AdapterBatchT

Parameters

batch
missing
nthread

Returns

The maximum number of columns encountered in this input batch. Useful when pushing many adapter batches to work out the total number of columns.

Push() [2/2]

void xgboost::SparsePage::Push

(

const SparsePage &

batch

)

Push a sparse page.

Parameters

batch

the row page

PushCSC()

void xgboost::SparsePage::PushCSC

(

const SparsePage &

batch

)

Push a SparsePage stored in CSC format.

Parameters

batch

The row batch to be pushed

Reindex()

void xgboost::SparsePage::Reindex	(	uint64_t	feature_offset,
		int32_t	n_threads
	)

Reindex the column index with an offset.

SetBaseRowId()

void xgboost::SparsePage::SetBaseRowId ( size_t  row_id )

inline

Set the base row id for this page.

Size()

size_t xgboost::SparsePage::Size ( ) const

inline

Returns

Number of instances in the page.

SortIndices()

void xgboost::SparsePage::SortIndices

(

int32_t

n_threads

)

Sort the column index.

SortRows()

void xgboost::SparsePage::SortRows

(

int32_t

n_threads

)

Member Data Documentation

base_rowid

size_t xgboost::SparsePage::base_rowid {0}

data

HostDeviceVector<Entry> xgboost::SparsePage::data

the data of the segments

offset

HostDeviceVector<bst_idx_t> xgboost::SparsePage::offset

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

• /home/docs/checkouts/readthedocs.org/user_builds/xgboost/checkouts/stable/include/xgboost/data.h