org.nd4j.linalg.cpu.nativecpu.compression

Class CpuFlexibleThreshold

java.lang.Object

org.nd4j.compression.impl.AbstractCompressor

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

org.nd4j.linalg.cpu.nativecpu.compression.CpuFlexibleThreshold

All Implemented Interfaces:

NDArrayCompressor

public class CpuFlexibleThreshold
extends CpuThreshold

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. Unlike CpuThreshold codec, CpuFlexibleThreshold tries to target specified sparsity/density updates ratio via topN approach PLEASE NOTE: DO NOT USE THIS COMPRESSOR UNLESS YOU'RE 100% SURE WHAT YOU DO!

Author:

raver119@gmail.com

Field Summary

Fields inherited from class org.nd4j.linalg.cpu.nativecpu.compression.CpuThreshold

threshold

Constructor Summary

Constructors

Constructor and Description
CpuFlexibleThreshold()

Method Summary

Modifier and Type	Method and Description
org.nd4j.linalg.api.buffer.DataBuffer	compress(org.nd4j.linalg.api.buffer.DataBuffer buffer)
void	configure(Object... vars) This method allows you to configure desired sparsity/density ratio for updates.
String	getDescriptor() This method returns compression descriptor.

Methods inherited from class org.nd4j.linalg.cpu.nativecpu.compression.CpuThreshold

compress, compressPointer, decompress, getCompressionType

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

Constructor Detail

CpuFlexibleThreshold

public CpuFlexibleThreshold()

Method Detail

getDescriptor

public String getDescriptor()

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

Specified by:

getDescriptor in interface NDArrayCompressor

Overrides:

getDescriptor in class CpuThreshold

Returns:

configure

public void configure(Object... vars)

This method allows you to configure desired sparsity/density ratio for updates. Pass it as float/double value Default value: 0.1

Specified by:

configure in interface NDArrayCompressor

Overrides:

configure in class CpuThreshold

Parameters:

vars -

compress

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

Specified by:

compress in interface NDArrayCompressor

Overrides:

compress in class CpuThreshold