#include <tiled_lorenzo_stage.h>

Inheritance diagram for fz::TiledLorenzoStage< T >:

Public Member Functions
void	setInverse (bool inv) override

void	setDims (const std::array< size_t, 3 > &dims) override

void	setTileShape (uint32_t tx, uint32_t ty=1, uint32_t tz=1)

uint32_t	getTileElems () const
	Elements per tile = the AdaptiveBitpack block_size that aligns blocks to tiles.

void	execute (cudaStream_t stream, MemoryPool pool, const std::vector< void > &inputs, const std::vector< void * > &outputs, const std::vector< size_t > &sizes) override

std::string	getName () const override

std::vector< size_t >	estimateOutputSizes (const std::vector< size_t > &input_sizes) const override

std::unordered_map< std::string, size_t >	getActualOutputSizesByName () const override

size_t	getActualOutputSize (int index) const override

uint16_t	getStageTypeId () const override

uint8_t	getOutputDataType (size_t) const override

uint8_t	getInputDataType (size_t) const override

size_t	serializeHeader (size_t, uint8_t *buf, size_t max_size) const override

void	deserializeHeader (const uint8_t *buf, size_t size) override

size_t	getMaxHeaderSize (size_t) const override

Public Member Functions inherited from fz::Stage
virtual size_t	getRequiredInputAlignment () const

virtual std::vector< std::string >	getOutputNames () const

int	getOutputIndex (const std::string &name) const

virtual void	saveState ()

virtual void	onFinalize (size_t, MemoryPool *)

virtual size_t	estimateDeviceFootprintBytes (size_t) const

virtual size_t	estimatePinnedFootprintBytes (size_t) const

virtual void	postStreamSync (cudaStream_t stream)

virtual bool	isGraphCompatible () const

virtual size_t	estimateScratchBytes (const std::vector< size_t > &input_sizes) const

Detailed Description

template<typename T>
class fz::TiledLorenzoStage< T >

Dimension-aware (tiled separable) Lorenzo predictor (cuSZp3). Lossless.

Note: Prior work: the dimension-aware separable delta is the cuSZp3 design (Yafan Huang et al., SC'25, BSD-3-Clause). This stage is a direct port of the cuSZp3 delta kernel logic (cuSZp_kernels_{2D,3D}_f32.cu); the tile-major modular decomposition, FZM header, and MemoryPool integration are FZGPUModules code. The cuSZp BSD-3-Clause copyright is reproduced in THIRD_PARTY.md. See also memory/cuszp_stages.md (Part 8).

Template Parameters

T	Signed element type: `int16_t` or `int32_t`.

Member Function Documentation

◆ setInverse()

template<typename T >

void fz::TiledLorenzoStage< T >::setInverse ( bool inverse )

inlineoverridevirtual

Switch between forward (compression) and inverse (decompression) mode. Affects getNumInputs()/getNumOutputs() for stages with asymmetric port counts.

Reimplemented from fz::Stage.

◆ setDims()

template<typename T >

void fz::TiledLorenzoStage< T >::setDims ( const std::array< size_t, 3 > & dims )

inlineoverridevirtual

Called once by Pipeline::finalize() so stages can react to the dataset dimensions set via Pipeline::setDims() after construction.

Parameters

dims	{x, y, z} extents (z==1 → 2-D; y==z==1 → 1-D)

Reimplemented from fz::Stage.

◆ setTileShape()

template<typename T >

void fz::TiledLorenzoStage< T >::setTileShape	(	uint32_t	tx,
		uint32_t	ty = `1`,
		uint32_t	tz = `1`
	)

inline

Set the tile shape. tz == 1 ⇒ 2-D tile; ty == tz == 1 ⇒ 1-D tile. The product tx*ty*tz (= tile_elems, the natural AdaptiveBitpack block size) must be in [1, 1024]. Each extent must be in [1, 255]. Pass 0 for any extent to keep the ndim-derived default (2-D 8x8, 3-D 4x4x4, 1-D 64).

◆ execute()

template<typename T >

void fz::TiledLorenzoStage< T >::execute	(	cudaStream_t	stream,
		MemoryPool *	pool,
		const std::vector< void * > &	inputs,
		const std::vector< void * > &	outputs,
		const std::vector< size_t > &	sizes
	)

overridevirtual

Execute the stage. Inputs, outputs, and sizes are device pointers/bytes.

Stages may call cudaStreamSynchronize(stream) or issue blocking D2H copies when the algorithm requires it (e.g. Huffman histogram readback for codebook construction, ANS renormalization tables). Such stages must return false from isGraphCompatible() and must document the sync points.

Note: the DAG dispatches sibling nodes (same topological level) via a sequential CPU loop, each enqueuing to its own stream. A sync inside execute() blocks the CPU from dispatching subsequent siblings until the synced stream is idle — this delays parallel branches in wide DAGs. In a linear pipeline there are no siblings and no extra cost.

Implements fz::Stage.

◆ getName()

template<typename T >

std::string fz::TiledLorenzoStage< T >::getName ( ) const

inlineoverridevirtual

Human-readable name used in error messages and debug output.

Implements fz::Stage.

◆ estimateOutputSizes()

template<typename T >

std::vector< size_t > fz::TiledLorenzoStage< T >::estimateOutputSizes ( const std::vector< size_t > & input_sizes ) const

inlineoverridevirtual

Estimate output buffer sizes given input sizes. Used for buffer allocation planning in PREALLOCATE mode — must be a safe upper bound; under-estimation causes buffer overruns.

Implements fz::Stage.

◆ getActualOutputSizesByName()

template<typename T >

std::unordered_map< std::string, size_t > fz::TiledLorenzoStage< T >::getActualOutputSizesByName ( ) const

inlineoverridevirtual

Actual output sizes after execute(), keyed by output port name.

Implements fz::Stage.

◆ getActualOutputSize()

template<typename T >

size_t fz::TiledLorenzoStage< T >::getActualOutputSize ( int index ) const

inlineoverridevirtual

Actual size of a single output by index after execute(). Avoids constructing the map for the common single-output case. Default delegates to getActualOutputSizesByName(); override to return directly from an internal field.

Reimplemented from fz::Stage.

◆ getStageTypeId()

template<typename T >

uint16_t fz::TiledLorenzoStage< T >::getStageTypeId ( ) const

inlineoverridevirtual

Stage type identifier written into the FZM file header.

Implements fz::Stage.

◆ getOutputDataType()

template<typename T >

uint8_t fz::TiledLorenzoStage< T >::getOutputDataType ( size_t output_index ) const

inlineoverridevirtual

DataType enum of the given output port.

Implements fz::Stage.

◆ getInputDataType()

template<typename T >

uint8_t fz::TiledLorenzoStage< T >::getInputDataType ( size_t ) const

inlineoverridevirtual

Expected DataType of the given input port.

Used by Pipeline::finalize() to detect type mismatches between connected stages before any execution. Return DataType::UNKNOWN to opt out of checking — byte-transparent stages (Bitshuffle, RZE, RRE) and mock stages must return UNKNOWN; finalize() skips any connection where either side is UNKNOWN.

Reimplemented from fz::Stage.

◆ serializeHeader()

template<typename T >

size_t fz::TiledLorenzoStage< T >::serializeHeader	(	size_t	output_index,
		uint8_t *	header_buffer,
		size_t	max_size
	)		const

inlineoverridevirtual

Serialize stage config into header_buffer (max 128 bytes) for the FZM file. Return the number of bytes written, or 0 if the stage has no config.

Reimplemented from fz::Stage.

◆ deserializeHeader()

template<typename T >

void fz::TiledLorenzoStage< T >::deserializeHeader	(	const uint8_t *	header_buffer,
		size_t	size
	)

inlineoverridevirtual

Restore stage config from header_buffer during decompression.

Reimplemented from fz::Stage.

◆ getMaxHeaderSize()

template<typename T >

size_t fz::TiledLorenzoStage< T >::getMaxHeaderSize ( size_t output_index ) const

inlineoverridevirtual

Maximum bytes this stage writes into its per-output FZM header slot.

Reimplemented from fz::Stage.

Public Member Functions

Detailed Description

Member Function Documentation

◆ setInverse()

◆ setDims()

◆ setTileShape()

◆ execute()

◆ getName()

◆ estimateOutputSizes()

◆ getActualOutputSizesByName()

◆ getActualOutputSize()

◆ getStageTypeId()

◆ getOutputDataType()

◆ getInputDataType()

◆ serializeHeader()

◆ deserializeHeader()

◆ getMaxHeaderSize()