org.nd4j.linalg.cpu.nativecpu.compression

Class CpuThreshold

java.lang.Object

org.nd4j.compression.impl.AbstractCompressor

org.nd4j.linalg.cpu.nativecpu.compression.CpuThreshold

All Implemented Interfaces:

NDArrayCompressor

Direct Known Subclasses:

CpuFlexibleThreshold

public class CpuThreshold
extends AbstractCompressor

This compression is very special case, and shouldn't be ever used outside of ParallelWrapper/ParameterServer implementation. It encodes data as delta between zero and abs threshold. PLEASE NOTE: DO NOT USE THIS COMPRESSOR UNLESS YOU'RE 100% SURE WHAT YOU DO!

Author:

raver119@gmail.com

Field Summary

Fields

Modifier and Type	Field and Description
protected float	threshold

Constructor Summary

Constructors

Constructor and Description
CpuThreshold()

Method Summary

Modifier and Type	Method and Description
org.nd4j.linalg.api.buffer.DataBuffer	compress(org.nd4j.linalg.api.buffer.DataBuffer buffer)
INDArray	compress(INDArray array)
protected CompressedDataBuffer	compressPointer(org.nd4j.linalg.api.buffer.DataBuffer.TypeEx srcType, org.bytedeco.javacpp.Pointer srcPointer, int length, int elementSize)
void	configure(Object... vars) This method allows you to configure threshold for delta extraction.
org.nd4j.linalg.api.buffer.DataBuffer	decompress(org.nd4j.linalg.api.buffer.DataBuffer buffer)
CompressionType	getCompressionType()
String	getDescriptor() This method returns compression descriptor.

Methods inherited from class org.nd4j.compression.impl.AbstractCompressor

compress, compress, compress, compress, compressi, convertType, decompress, decompressi, getBufferTypeEx, getGlobalTypeEx

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

threshold

protected float threshold

Constructor Detail

CpuThreshold

public CpuThreshold()

Method Detail

getDescriptor

public String getDescriptor()

This method returns compression descriptor. It should be unique for any compressor implementation

Returns:

configure

public void configure(Object... vars)

This method allows you to configure threshold for delta extraction. Pass it as float/double value Default value: 1e-3

Specified by:

configure in interface NDArrayCompressor

Overrides:

configure in class AbstractCompressor

Parameters:

vars -

compress

public INDArray compress(INDArray array)

Specified by:

compress in interface NDArrayCompressor

Overrides:

compress in class AbstractCompressor

getCompressionType

public CompressionType getCompressionType()

decompress

public org.nd4j.linalg.api.buffer.DataBuffer decompress(org.nd4j.linalg.api.buffer.DataBuffer buffer)

Specified by:

decompress in interface NDArrayCompressor

Specified by:

decompress in class AbstractCompressor

compress

public org.nd4j.linalg.api.buffer.DataBuffer compress(org.nd4j.linalg.api.buffer.DataBuffer buffer)

Specified by:

compress in interface NDArrayCompressor

Specified by:

compress in class AbstractCompressor

compressPointer

protected CompressedDataBuffer compressPointer(org.nd4j.linalg.api.buffer.DataBuffer.TypeEx srcType,
                                               org.bytedeco.javacpp.Pointer srcPointer,
                                               int length,
                                               int elementSize)

Specified by:

compressPointer in class AbstractCompressor