https://github.com/Microsoft/CNTK
Tip revision: d2287a05527324f94677431caf518696c7dd5974 authored by Mark Hillebrand on 18 January 2016, 08:37:45 UTC
License change
License change
Tip revision: d2287a0
UCIFastReader.h
//
// <copyright file="UCIFastReader.h" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// UCIFastReader.h - Include file for the MTK and MLF format of features and samples
#pragma once
#include "stdafx.h"
#include "DataReader.h"
#include "DataWriter.h"
#include "Config.h"
#include "RandomOrdering.h"
#include <future>
#include "UCIParser.h"
#include <string>
#include <map>
#include <vector>
#include "CUDAPageLockedMemAllocator.h"
static inline size_t RoundUp(size_t m, size_t n)
{
if (m % n == 0) return m / n;
else return m / n + 1;
}
namespace Microsoft { namespace MSR { namespace CNTK {
enum LabelKind
{
labelNone = 0, // no labels to worry about
labelCategory = 1, // category labels, creates mapping tables
labelRegression = 2, // regression labels
labelOther = 3, // some other type of label
};
template<class ElemType>
class UCIFastReader : public IDataReader<ElemType>
{
public:
using LabelType = typename IDataReader<ElemType>::LabelType;
using LabelIdType = typename IDataReader<ElemType>::LabelIdType;
using IDataReader<ElemType>::mRequestedNumParallelSequences;
//typedef std::string LabelType;
//typedef unsigned LabelIdType;
private:
UCIParser<ElemType, LabelType> m_parser;
size_t m_mbSize; // size of minibatch requested
LabelIdType m_labelIdMax; // maximum label ID we have encountered so far
LabelIdType m_labelDim; // maximum label ID we will ever see (used for array dimensions)
size_t m_mbStartSample; // starting sample # of the next minibatch
size_t m_epochSize; // size of an epoch
size_t m_epoch; // which epoch are we on
size_t m_epochStartSample; // the starting sample for the epoch
size_t m_totalSamples; // number of samples in the dataset
size_t m_randomizeRange; // randomization range
size_t m_featureCount; // feature count
size_t m_readNextSample; // next sample to read
bool m_labelFirst; // the label is the first element in a line
bool m_partialMinibatch; // a partial minibatch is allowed
LabelKind m_labelType; // labels are categories, create mapping table
RandomOrdering m_randomordering; // randomizing class
std::wstring m_labelsName;
std::wstring m_featuresName;
std::wstring m_labelsCategoryName;
std::wstring m_labelsMapName;
std::shared_ptr<ElemType> m_featuresBuffer;
std::shared_ptr<ElemType> m_labelsBuffer;
std::shared_ptr<LabelIdType> m_labelsIdBuffer;
std::wstring m_labelFileToWrite; // set to the path if we need to write out the label file
// Prefetching related fields
bool m_prefetchEnabled;
std::future<bool> m_pendingAsyncGetMinibatch;
std::map<std::wstring, std::unique_ptr<Matrix<ElemType>>> m_prefetchMatrices;
// Distributed reading related fields
size_t m_subsetNum;
size_t m_numSubsets;
bool m_endReached;
int m_traceLevel;
// feature and label data are parallel arrays
std::vector<ElemType> m_featureData;
std::vector<LabelIdType> m_labelIdData;
std::vector<LabelType> m_labelData;
MBLayoutPtr m_pMBLayout;
// map is from ElemType to LabelType
// For UCI, we really only need an int for label data, but we have to transmit in Matrix, so use ElemType instead
std::map<LabelIdType, LabelType> m_mapIdToLabel;
std::map<LabelType, LabelIdType> m_mapLabelToId;
/**
for reading one line per file, i.e., a file has only one line of data
*/
bool mOneLinePerFile;
unique_ptr<CUDAPageLockedMemAllocator> m_cudaAllocator;
// caching support
DataReader<ElemType>* m_cachingReader;
DataWriter<ElemType>* m_cachingWriter;
ConfigParameters m_readerConfig;
void InitCache(const ConfigParameters & config);
void InitCache(const ScriptableObjects::IConfigRecord & config);
size_t RandomizeSweep(size_t epochSample);
bool Randomize() {return m_randomizeRange != randomizeNone;}
size_t UpdateDataVariables(size_t mbStartSample);
void SetupEpoch();
void StoreLabel(ElemType& labelStore, const LabelType& labelValue);
size_t RecordsToRead(size_t mbStartSample, bool tail=false);
void ReleaseMemory();
void WriteLabelFile();
virtual bool EnsureDataAvailable(size_t mbStartSample, bool endOfDataCheck=false);
virtual bool ReadRecord(size_t readSample);
// Helper functions
unique_ptr<CUDAPageLockedMemAllocator>& GetCUDAAllocator(int deviceID);
std::shared_ptr<ElemType> AllocateIntermediateBuffer(int deviceID, size_t numElements);
public:
template<class ConfigRecordType> void InitFromConfig(const ConfigRecordType &);
virtual void Init(const ConfigParameters & config) override { InitFromConfig(config); }
virtual void Init(const ScriptableObjects::IConfigRecord & config) override { InitFromConfig(config); }
virtual void Destroy();
UCIFastReader() { m_pMBLayout=make_shared<MBLayout>(); }
virtual ~UCIFastReader();
virtual void StartMinibatchLoop(size_t mbSize, size_t epoch, size_t requestedEpochSamples = requestDataSize)
{
return StartDistributedMinibatchLoop(mbSize, epoch, 0, 1, requestedEpochSamples);
}
virtual bool SupportsDistributedMBRead() const override
{
return ((m_cachingReader == nullptr) || m_cachingReader->SupportsDistributedMBRead());
}
virtual void StartDistributedMinibatchLoop(size_t mbSize, size_t epoch, size_t subsetNum, size_t numSubsets, size_t requestedEpochSamples = requestDataSize) override;
virtual bool GetMinibatch(std::map<std::wstring, Matrix<ElemType>*>& matrices);
bool GetMinibatchImpl(std::map<std::wstring, Matrix<ElemType>*>& matrices);
size_t GetNumParallelSequences() { return m_pMBLayout->GetNumParallelSequences(); }
void CopyMBLayoutTo(MBLayoutPtr pMBLayout) { pMBLayout->CopyFrom(m_pMBLayout); };
virtual const std::map<LabelIdType, LabelType>& GetLabelMapping(const std::wstring& sectionName);
virtual void SetLabelMapping(const std::wstring& sectionName, const std::map<LabelIdType, LabelType>& labelMapping);
virtual bool GetData(const std::wstring& sectionName, size_t numRecords, void* data, size_t& dataBufferSize, size_t recordStart=0);
virtual bool DataEnd(EndDataType endDataType);
void SetSentenceSegBatch(Matrix<float>&, Matrix<ElemType>&) { };
void SetNumParallelSequences(const size_t sz);
void SetRandomSeed(int) { NOT_IMPLEMENTED; }
};
}}}