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Tip revision: 7f7eb8b1d4bebd8b365f8b0414a539e6995f0898 authored by Frank Seide on 04 March 2016, 04:22:48 UTC
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Tip revision: 7f7eb8b
UCIFastReader.h
//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE.md file in the project root for full license information.
//
// 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
{
shared_ptr<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;
StreamMinibatchInputs 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* m_cachingReader;
DataWriter* 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(StreamMinibatchInputs& matrices);
bool GetMinibatchImpl(StreamMinibatchInputs& 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();
void SetSentenceSegBatch(Matrix<float>&, Matrix<ElemType>&){};
void SetNumParallelSequences(const size_t sz);
void SetRandomSeed(int)
{
NOT_IMPLEMENTED;
}
};
} } }