FedRawDataInputSource.cc

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#include <fcntl.h>
#include <iomanip>
#include <iostream>
#include <memory>
#include <sstream>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/time.h>
#include <unistd.h>
#include <vector>
#include <fstream>
#include <zlib.h>
#include <cstdio>
#include <chrono>

#include <boost/algorithm/string.hpp>
#include <boost/filesystem/fstream.hpp>


#include "DataFormats/FEDRawData/interface/FEDNumbering.h"
#include "DataFormats/FEDRawData/interface/FEDHeader.h"
#include "DataFormats/FEDRawData/interface/FEDTrailer.h"
#include "DataFormats/FEDRawData/interface/FEDRawDataCollection.h"

#include "DataFormats/TCDS/interface/TCDSRaw.h"

#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/InputSourceDescription.h"
#include "FWCore/Framework/interface/InputSourceMacros.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Utilities/interface/UnixSignalHandlers.h"

#include "EventFilter/Utilities/interface/GlobalEventNumber.h"

#include "EventFilter/Utilities/interface/FedRawDataInputSource.h"

#include "EventFilter/Utilities/interface/FastMonitoringService.h"
#include "EventFilter/Utilities/interface/DataPointDefinition.h"
#include "EventFilter/Utilities/interface/FFFNamingSchema.h"

#include "EventFilter/Utilities/interface/AuxiliaryMakers.h"

#include "DataFormats/Provenance/interface/EventAuxiliary.h"
#include "DataFormats/Provenance/interface/EventID.h"
#include "DataFormats/Provenance/interface/Timestamp.h"
#include "EventFilter/Utilities/interface/crc32c.h"

//JSON file reader
#include "EventFilter/Utilities/interface/reader.h"

#include <boost/lexical_cast.hpp>

FedRawDataInputSource::FedRawDataInputSource(edm::ParameterSet const& pset,
                                             edm::InputSourceDescription const& desc) :
  edm::RawInputSource(pset, desc),
  defPath_(pset.getUntrackedParameter<std::string> ("buDefPath", "")),
  eventChunkSize_(pset.getUntrackedParameter<unsigned int> ("eventChunkSize",32)*1048576),
  eventChunkBlock_(pset.getUntrackedParameter<unsigned int> ("eventChunkBlock",32)*1048576),
  numBuffers_(pset.getUntrackedParameter<unsigned int> ("numBuffers",2)),
  maxBufferedFiles_(pset.getUntrackedParameter<unsigned int> ("maxBufferedFiles",2)),
  getLSFromFilename_(pset.getUntrackedParameter<bool> ("getLSFromFilename", true)),
  alwaysStartFromFirstLS_(pset.getUntrackedParameter<bool> ("alwaysStartFromFirstLS", false)),
  verifyAdler32_(pset.getUntrackedParameter<bool> ("verifyAdler32", true)),
  verifyChecksum_(pset.getUntrackedParameter<bool> ("verifyChecksum", true)),
  useL1EventID_(pset.getUntrackedParameter<bool> ("useL1EventID", false)),
  fileNames_(pset.getUntrackedParameter<std::vector<std::string>> ("fileNames",std::vector<std::string>())),
  fileListMode_(pset.getUntrackedParameter<bool> ("fileListMode", false)),
  fileListLoopMode_(pset.getUntrackedParameter<bool> ("fileListLoopMode", false)),
  runNumber_(edm::Service<evf::EvFDaqDirector>()->getRunNumber()),
  daqProvenanceHelper_(edm::TypeID(typeid(FEDRawDataCollection))),
  eventID_(),
  processHistoryID_(),
  currentLumiSection_(0),
  tcds_pointer_(nullptr),
  eventsThisLumi_(0)
{
  char thishost[256];
  gethostname(thishost, 255);
  edm::LogInfo("FedRawDataInputSource") << "Construction. read-ahead chunk size -: "
                                        << std::endl << (eventChunkSize_/1048576)
                                        << " MB on host " << thishost;

  long autoRunNumber = -1;
  if (fileListMode_)  {
    autoRunNumber = initFileList();
    if (!fileListLoopMode_) {
      if (autoRunNumber<0)
        throw cms::Exception("FedRawDataInputSource::FedRawDataInputSource") << "Run number not found from filename";
      //override run number
      runNumber_ = (edm::RunNumber_t)autoRunNumber;
      edm::Service<evf::EvFDaqDirector>()->overrideRunNumber((unsigned int)autoRunNumber);
    }
  }

  processHistoryID_ = daqProvenanceHelper_.daqInit(productRegistryUpdate(), processHistoryRegistryForUpdate());
  setNewRun();
  //todo:autodetect from file name (assert if names differ)
  setRunAuxiliary(new edm::RunAuxiliary(runNumber_, edm::Timestamp::beginOfTime(),
                    edm::Timestamp::invalidTimestamp()));

  //make sure that chunk size is N * block size
  assert(eventChunkSize_>=eventChunkBlock_);
  readBlocks_ = eventChunkSize_/eventChunkBlock_;
  if (readBlocks_*eventChunkBlock_ != eventChunkSize_)
    eventChunkSize_=readBlocks_*eventChunkBlock_;

  if (!numBuffers_)
    throw cms::Exception("FedRawDataInputSource::FedRawDataInputSource") <<
               "no reading enabled with numBuffers parameter 0";

  numConcurrentReads_=numBuffers_-1;
  singleBufferMode_ = !(numBuffers_>1);
  readingFilesCount_=0;

  if (!crc32c_hw_test())
    edm::LogError("FedRawDataInputSource::FedRawDataInputSource") << "Intel crc32c checksum computation unavailable";

  //get handles to DaqDirector and FastMonitoringService because getting them isn't possible in readSupervisor thread
  if (fileListMode_) {
    try {
      fms_ = static_cast<evf::FastMonitoringService *> (edm::Service<evf::MicroStateService>().operator->());
    } catch(cms::Exception const&) {
        edm::LogInfo("FedRawDataInputSource") << "No FastMonitoringService found in the configuration";
    }
  }
  else {
    fms_ = static_cast<evf::FastMonitoringService *> (edm::Service<evf::MicroStateService>().operator->());
    if (!fms_) {
      throw cms::Exception("FedRawDataInputSource") << "FastMonitoringService not found";
    }
  }

  daqDirector_ = edm::Service<evf::EvFDaqDirector>().operator->();
  if (!daqDirector_)
    cms::Exception("FedRawDataInputSource") << "EvFDaqDirector not found";

  useFileBroker_ = daqDirector_->useFileBroker();
  if (useFileBroker_)
    edm::LogInfo("FedRawDataInputSource") << "EvFDaqDirector/Source configured to use file service";
  //set DaqDirector to delete files in preGlobalEndLumi callback
  daqDirector_->setDeleteTracking(&fileDeleteLock_,&filesToDelete_);
  if (fms_) {
   daqDirector_->setFMS(fms_);
   fms_->setInputSource(this);
   fms_->setInState(evf::FastMonitoringThread::inInit);
   fms_->setInStateSup(evf::FastMonitoringThread::inInit);
  }
  //should delete chunks when run stops
  for (unsigned int i=0;i<numBuffers_;i++) {
    freeChunks_.push(new InputChunk(i,eventChunkSize_));
  }

  quit_threads_ = false;

  for (unsigned int i=0;i<numConcurrentReads_;i++)
  {
    std::unique_lock<std::mutex> lk(startupLock_);
    //issue a memory fence here and in threads (constructor was segfaulting without this)
    thread_quit_signal.push_back(false);
    workerJob_.push_back(ReaderInfo(nullptr,nullptr));
    cvReader_.push_back(new std::condition_variable);
    tid_active_.push_back(0);
    threadInit_.store(false,std::memory_order_release);
    workerThreads_.push_back(new std::thread(&FedRawDataInputSource::readWorker,this,i));
    startupCv_.wait(lk);
  }

  runAuxiliary()->setProcessHistoryID(processHistoryID_);
}

FedRawDataInputSource::~FedRawDataInputSource()
{
  quit_threads_=true;

  //delete any remaining open files
  for (auto it = filesToDelete_.begin();it!=filesToDelete_.end();it++) {
    deleteFile(it->second->fileName_);
    delete it->second;
  }
  if (startedSupervisorThread_) {
    readSupervisorThread_->join();
  }
  else {
    //join aux threads in case the supervisor thread was not started
    for (unsigned int i=0;i<workerThreads_.size();i++) {
      std::unique_lock<std::mutex> lk(mReader_);
      thread_quit_signal[i]=true;
      cvReader_[i]->notify_one();
      lk.unlock();
      workerThreads_[i]->join();
      delete workerThreads_[i];
    }
  }
  for (unsigned int i=0;i<numConcurrentReads_;i++) delete cvReader_[i];
  /*
  for (unsigned int i=0;i<numConcurrentReads_+1;i++) {
    InputChunk *ch;
    while (!freeChunks_.try_pop(ch)) {}
    delete ch;
  }
  */
}

void FedRawDataInputSource::fillDescriptions(edm::ConfigurationDescriptions& descriptions)
{
  edm::ParameterSetDescription desc;
  desc.setComment("File-based Filter Farm input source for reading raw data from BU ramdisk");
  desc.addUntracked<unsigned int> ("eventChunkSize",32)->setComment("Input buffer (chunk) size");
  desc.addUntracked<unsigned int> ("eventChunkBlock",32)->setComment("Block size used in a single file read call (must be smaller or equal to buffer size)");
  desc.addUntracked<unsigned int> ("numBuffers",2)->setComment("Number of buffers used for reading input");
  desc.addUntracked<unsigned int> ("maxBufferedFiles",2)->setComment("Maximum number of simultaneously buffered raw files");
  desc.addUntracked<unsigned int> ("alwaysStartFromfirstLS",false)->setComment("Force source to start from LS 1 if server provides higher lumisection number");
  desc.addUntracked<bool> ("verifyAdler32", true)->setComment("Verify event Adler32 checksum with FRDv3 or v4");
  desc.addUntracked<bool> ("verifyChecksum", true)->setComment("Verify event CRC-32C checksum of FRDv5 or higher");
  desc.addUntracked<bool> ("useL1EventID", false)->setComment("Use L1 event ID from FED header if true or from TCDS FED if false");
  desc.addUntracked<bool> ("fileListMode", false)->setComment("Use fileNames parameter to directly specify raw files to open");
  desc.addUntracked<std::vector<std::string>> ("fileNames", std::vector<std::string>())->setComment("file list used when fileListMode is enabled");
  desc.setAllowAnything();
  descriptions.add("source", desc);
}

bool FedRawDataInputSource::checkNextEvent()
{
  if (!startedSupervisorThread_)
  {
    //this thread opens new files and dispatches reading to worker readers
    //threadInit_.store(false,std::memory_order_release);
    std::unique_lock<std::mutex> lk(startupLock_);
    readSupervisorThread_.reset(new std::thread(&FedRawDataInputSource::readSupervisor,this));
    startedSupervisorThread_=true;
    startupCv_.wait(lk);
  }
  //signal hltd to start event accounting
  if (!currentLumiSection_)
    daqDirector_->createProcessingNotificationMaybe();
  if (fms_) fms_->setInState(evf::FastMonitoringThread::inWaitInput);
  switch (nextEvent() ) {
    case evf::EvFDaqDirector::runEnded: {
      //maybe create EoL file in working directory before ending run
      struct stat buf;
      if (!useFileBroker_ && currentLumiSection_ > 0) {
        bool eolFound = (stat(daqDirector_->getEoLSFilePathOnBU(currentLumiSection_).c_str(), &buf) == 0);
        if (eolFound) {
          const std::string fuEoLS = daqDirector_->getEoLSFilePathOnFU(currentLumiSection_);
          bool found = (stat(fuEoLS.c_str(), &buf) == 0);
          if ( !found ) {
            daqDirector_->lockFULocal2();
            int eol_fd = open(fuEoLS.c_str(), O_RDWR|O_CREAT, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
            close(eol_fd);
            daqDirector_->unlockFULocal2();
          }
        }
      }
      //also create EoR file in FU data directory
      bool eorFound =  (stat(daqDirector_->getEoRFilePathOnFU().c_str(),&buf) == 0);
      if (!eorFound) {
        int eor_fd = open(daqDirector_->getEoRFilePathOnFU().c_str(), O_RDWR|O_CREAT, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
        close(eor_fd);
      }
      reportEventsThisLumiInSource(currentLumiSection_,eventsThisLumi_);
      eventsThisLumi_=0;
      resetLuminosityBlockAuxiliary();
       edm::LogInfo("FedRawDataInputSource") << "----------------RUN ENDED----------------";
      return false;
    }
    case evf::EvFDaqDirector::noFile: {
      //this is not reachable
      return true;
    }
    case evf::EvFDaqDirector::newLumi: {
      //std::cout << "--------------NEW LUMI---------------" << std::endl;
      return true;
    }
    default: {
      if (!getLSFromFilename_) {
        //get new lumi from file header
    if (event_->lumi() > currentLumiSection_) {
          reportEventsThisLumiInSource(currentLumiSection_,eventsThisLumi_);
      eventsThisLumi_=0;
          maybeOpenNewLumiSection( event_->lumi() );
    }
      }
      if (fileListMode_ || fileListLoopMode_)
        eventRunNumber_=runNumber_;
      else
        eventRunNumber_=event_->run();
      L1EventID_ = event_->event();

      setEventCached();

      return true;
    }
  }
}

void FedRawDataInputSource::maybeOpenNewLumiSection(const uint32_t lumiSection)
{
  if (!luminosityBlockAuxiliary()
    || luminosityBlockAuxiliary()->luminosityBlock() != lumiSection) {

    if (!useFileBroker_) {
      if ( currentLumiSection_ > 0) {
        const std::string fuEoLS =
          daqDirector_->getEoLSFilePathOnFU(currentLumiSection_);
        struct stat buf;
        bool found = (stat(fuEoLS.c_str(), &buf) == 0);
        if ( !found ) {
          daqDirector_->lockFULocal2();
          int eol_fd = open(fuEoLS.c_str(), O_RDWR|O_CREAT, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
          close(eol_fd);
          daqDirector_->createBoLSFile(lumiSection,false);
          daqDirector_->unlockFULocal2();
        }
      }
      else daqDirector_->createBoLSFile(lumiSection,true);//needed for initial lumisection
    }

    currentLumiSection_ = lumiSection;

    resetLuminosityBlockAuxiliary();

    timeval tv;
    gettimeofday(&tv, nullptr);
    const edm::Timestamp lsopentime( (unsigned long long) tv.tv_sec * 1000000 + (unsigned long long) tv.tv_usec );

    edm::LuminosityBlockAuxiliary* lumiBlockAuxiliary =
      new edm::LuminosityBlockAuxiliary(
        runAuxiliary()->run(),
        lumiSection, lsopentime,
        edm::Timestamp::invalidTimestamp());

    setLuminosityBlockAuxiliary(lumiBlockAuxiliary);
    luminosityBlockAuxiliary()->setProcessHistoryID(processHistoryID_);

    edm::LogInfo("FedRawDataInputSource") << "New lumi section was opened. LUMI -: "<< lumiSection;
  }
}

inline evf::EvFDaqDirector::FileStatus FedRawDataInputSource::nextEvent()
{
   evf::EvFDaqDirector::FileStatus status = evf::EvFDaqDirector::noFile;
   while ((status = getNextEvent())==evf::EvFDaqDirector::noFile)
   {
       if (edm::shutdown_flag.load(std::memory_order_relaxed)) break;
   }
   return status;
}

inline evf::EvFDaqDirector::FileStatus FedRawDataInputSource::getNextEvent()
{

  if (setExceptionState_) threadError();
  if (!currentFile_)
  {
    evf::EvFDaqDirector::FileStatus status = evf::EvFDaqDirector::noFile;
    if (fms_) fms_->setInState(evf::FastMonitoringThread::inWaitInput);
    if (!fileQueue_.try_pop(currentFile_))
    {
      //sleep until wakeup (only in single-buffer mode) or timeout
      std::unique_lock<std::mutex> lkw(mWakeup_);
      if (cvWakeup_.wait_for(lkw, std::chrono::milliseconds(100)) == std::cv_status::timeout || !currentFile_)
        return evf::EvFDaqDirector::noFile;
    }
    status = currentFile_->status_;
    if ( status == evf::EvFDaqDirector::runEnded)
    {
      if (fms_) fms_->setInState(evf::FastMonitoringThread::inRunEnd);
      delete currentFile_;
      currentFile_=nullptr;
      return status;
    }
    else if ( status == evf::EvFDaqDirector::runAbort)
    {
      throw cms::Exception("FedRawDataInputSource::getNextEvent") << "Run has been aborted by the input source reader thread";
    }
    else if (status == evf::EvFDaqDirector::newLumi)
    {
      if (fms_) fms_->setInState(evf::FastMonitoringThread::inNewLumi);
      if (getLSFromFilename_) {
    if (currentFile_->lumi_ > currentLumiSection_) {
          reportEventsThisLumiInSource(currentLumiSection_,eventsThisLumi_);
      eventsThisLumi_=0;
          maybeOpenNewLumiSection(currentFile_->lumi_);
    }
      }
      else {//let this be picked up from next event
        status = evf::EvFDaqDirector::noFile;
      }

      delete currentFile_;
      currentFile_=nullptr;
      return status;
    }
    else if (status == evf::EvFDaqDirector::newFile) {
      currentFileIndex_++;
    }
    else
      assert(false);
  }
  if (fms_) fms_->setInState(evf::FastMonitoringThread::inProcessingFile);

  //file is empty
  if (!currentFile_->fileSize_) {
    readingFilesCount_--;
    //try to open new lumi
    assert(currentFile_->nChunks_==0);
    if (getLSFromFilename_)
      if (currentFile_->lumi_ > currentLumiSection_) {
        reportEventsThisLumiInSource(currentLumiSection_,eventsThisLumi_);
    eventsThisLumi_=0;
        maybeOpenNewLumiSection(currentFile_->lumi_);
      }
    //immediately delete empty file
    deleteFile(currentFile_->fileName_);
    delete currentFile_;
    currentFile_=nullptr;
    return evf::EvFDaqDirector::noFile;
  }

  //file is finished
  if (currentFile_->bufferPosition_==currentFile_->fileSize_) {
    readingFilesCount_--;
    //release last chunk (it is never released elsewhere)
    freeChunks_.push(currentFile_->chunks_[currentFile_->currentChunk_]);
    if (currentFile_->nEvents_>=0 && currentFile_->nEvents_!=int(currentFile_->nProcessed_))
    {
      throw cms::Exception("FedRawDataInputSource::getNextEvent")
    << "Fully processed " << currentFile_->nProcessed_
        << " from the file " << currentFile_->fileName_
    << " but according to BU JSON there should be "
    << currentFile_->nEvents_ << " events";
    }
    //try to wake up supervisor thread which might be sleeping waiting for the free chunk
    if (singleBufferMode_) {
      std::unique_lock<std::mutex> lkw(mWakeup_);
      cvWakeup_.notify_one();
    }
    bufferInputRead_=0;
    if (!daqDirector_->isSingleStreamThread() && !fileListMode_) {
      //put the file in pending delete list;
      std::unique_lock<std::mutex> lkw(fileDeleteLock_);
      filesToDelete_.push_back(std::pair<int,InputFile*>(currentFileIndex_,currentFile_));
    }
    else {
      //in single-thread and stream jobs, events are already processed
      deleteFile(currentFile_->fileName_);
      delete currentFile_;
    }
    currentFile_=nullptr;
    return evf::EvFDaqDirector::noFile;
  }


  //file is too short
  if (currentFile_->fileSize_ - currentFile_->bufferPosition_ < FRDHeaderVersionSize[detectedFRDversion_])
  {
    throw cms::Exception("FedRawDataInputSource::getNextEvent") <<
      "Premature end of input file while reading event header";
  }
  if (singleBufferMode_) {

    //should already be there
    if (fms_) fms_->setInState(evf::FastMonitoringThread::inWaitChunk);
    while (!currentFile_->waitForChunk(currentFile_->currentChunk_)) {
      usleep(10000);
      if (currentFile_->parent_->exceptionState() || setExceptionState_) currentFile_->parent_->threadError();
    }
    if (fms_) fms_->setInState(evf::FastMonitoringThread::inChunkReceived);

    unsigned char *dataPosition = currentFile_->chunks_[0]->buf_+ currentFile_->chunkPosition_;

    //conditions when read amount is not sufficient for the header to fit
    if (!bufferInputRead_ || bufferInputRead_ < FRDHeaderVersionSize[detectedFRDversion_]
       ||  eventChunkSize_ - currentFile_->chunkPosition_ < FRDHeaderVersionSize[detectedFRDversion_])
    {
      readNextChunkIntoBuffer(currentFile_);

      if (detectedFRDversion_==0) {
        detectedFRDversion_=*((uint32*)dataPosition);
        if (detectedFRDversion_>5)
          throw cms::Exception("FedRawDataInputSource::getNextEvent")
              << "Unknown FRD version -: " << detectedFRDversion_;
        assert(detectedFRDversion_>=1);
      }

      //recalculate chunk position
      dataPosition = currentFile_->chunks_[0]->buf_+ currentFile_->chunkPosition_;
      if ( bufferInputRead_ < FRDHeaderVersionSize[detectedFRDversion_])
      {
      throw cms::Exception("FedRawDataInputSource::getNextEvent") <<
    "Premature end of input file while reading event header";
      }
    }

    event_.reset( new FRDEventMsgView(dataPosition) );
    if (event_->size()>eventChunkSize_) {
      throw cms::Exception("FedRawDataInputSource::getNextEvent")
          << " event id:"<< event_->event()<< " lumi:" << event_->lumi()
          << " run:" << event_->run() << " of size:" << event_->size()
          << " bytes does not fit into a chunk of size:" << eventChunkSize_ << " bytes";
    }

    const uint32_t msgSize = event_->size()-FRDHeaderVersionSize[detectedFRDversion_];

    if (currentFile_->fileSize_ - currentFile_->bufferPosition_ < msgSize)
    {
      throw cms::Exception("FedRawDataInputSource::getNextEvent") <<
    "Premature end of input file while reading event data";
    }
    if (eventChunkSize_ - currentFile_->chunkPosition_ < msgSize) {
      readNextChunkIntoBuffer(currentFile_);
      //recalculate chunk position
      dataPosition = currentFile_->chunks_[0]->buf_+ currentFile_->chunkPosition_;
      event_.reset( new FRDEventMsgView(dataPosition) );
    }
    currentFile_->bufferPosition_ += event_->size();
    currentFile_->chunkPosition_ += event_->size();
    //last chunk is released when this function is invoked next time

  }
  //multibuffer mode:
  else
  {
    //wait for the current chunk to become added to the vector
    if (fms_) fms_->setInState(evf::FastMonitoringThread::inWaitChunk);
    while (!currentFile_->waitForChunk(currentFile_->currentChunk_)) {
      usleep(10000);
      if (setExceptionState_) threadError();
    }
    if (fms_) fms_->setInState(evf::FastMonitoringThread::inChunkReceived);

    //check if header is at the boundary of two chunks
    chunkIsFree_ = false;
    unsigned char *dataPosition;

    //read header, copy it to a single chunk if necessary
    bool chunkEnd = currentFile_->advance(dataPosition,FRDHeaderVersionSize[detectedFRDversion_]);

    event_.reset( new FRDEventMsgView(dataPosition) );
    if (event_->size()>eventChunkSize_) {
      throw cms::Exception("FedRawDataInputSource::getNextEvent")
          << " event id:"<< event_->event()<< " lumi:" << event_->lumi()
          << " run:" << event_->run() << " of size:" << event_->size()
          << " bytes does not fit into a chunk of size:" << eventChunkSize_ << " bytes";
    }

    const uint32_t msgSize = event_->size()-FRDHeaderVersionSize[detectedFRDversion_];

    if (currentFile_->fileSize_ - currentFile_->bufferPosition_ < msgSize)
    {
      throw cms::Exception("FedRawDataInputSource::getNextEvent") <<
    "Premature end of input file while reading event data";
    }

    if (chunkEnd) {
      //header was at the chunk boundary, we will have to move payload as well
      currentFile_->moveToPreviousChunk(msgSize,FRDHeaderVersionSize[detectedFRDversion_]);
      chunkIsFree_ = true;
    }
    else {
      //header was contiguous, but check if payload fits the chunk
      if (eventChunkSize_ - currentFile_->chunkPosition_ < msgSize) {
    //rewind to header start position
    currentFile_->rewindChunk(FRDHeaderVersionSize[detectedFRDversion_]);
    //copy event to a chunk start and move pointers
    chunkEnd = currentFile_->advance(dataPosition,FRDHeaderVersionSize[detectedFRDversion_]+msgSize);
    assert(chunkEnd);
    chunkIsFree_=true;
    //header is moved
    event_.reset( new FRDEventMsgView(dataPosition) );
      }
      else {
    //everything is in a single chunk, only move pointers forward
    chunkEnd = currentFile_->advance(dataPosition,msgSize);
    assert(!chunkEnd);
    chunkIsFree_=false;
      }
    }
  }//end multibuffer mode
  if (fms_) fms_->setInState(evf::FastMonitoringThread::inChecksumEvent);

  if (verifyChecksum_ && event_->version() >= 5)
  {
    uint32_t crc=0;
    crc = crc32c(crc,(const unsigned char*)event_->payload(),event_->eventSize());
    if ( crc != event_->crc32c() ) {
      if (fms_) fms_->setExceptionDetected(currentLumiSection_);
      throw cms::Exception("FedRawDataInputSource::getNextEvent") <<
        "Found a wrong crc32c checksum: expected 0x" << std::hex << event_->crc32c() <<
        " but calculated 0x" << crc;
    }
  }
  else if ( verifyAdler32_ && event_->version() >= 3)
  {
    uint32_t adler = adler32(0L,Z_NULL,0);
    adler = adler32(adler,(Bytef*)event_->payload(),event_->eventSize());

    if ( adler != event_->adler32() ) {
      if (fms_) fms_->setExceptionDetected(currentLumiSection_);
      throw cms::Exception("FedRawDataInputSource::getNextEvent") <<
        "Found a wrong Adler32 checksum: expected 0x" << std::hex << event_->adler32() <<
        " but calculated 0x" << adler;
    }
  }
  if (fms_) fms_->setInState(evf::FastMonitoringThread::inCachedEvent);

  currentFile_->nProcessed_++;

  return evf::EvFDaqDirector::sameFile;
}

void FedRawDataInputSource::deleteFile(std::string const& fileName)
{
  //no deletion in file list mode
  if (fileListMode_) return;

  const boost::filesystem::path filePath(fileName);
  LogDebug("FedRawDataInputSource") << "Deleting input file -:" << fileName;
  try {
    //sometimes this fails but file gets deleted
    boost::filesystem::remove(filePath);
  }
  catch (const boost::filesystem::filesystem_error& ex)
  {
    edm::LogError("FedRawDataInputSource") << " - deleteFile BOOST FILESYSTEM ERROR CAUGHT -: " << ex.what()
                                           << ". Trying again.";
    usleep(100000);
    try {
      boost::filesystem::remove(filePath);
    }
    catch (const boost::filesystem::filesystem_error&) {/*file gets deleted first time but exception is still thrown*/}
  }
  catch (std::exception& ex)
  {
    edm::LogError("FedRawDataInputSource") << " - deleteFile std::exception CAUGHT -: " << ex.what()
                                           << ". Trying again.";
    usleep(100000);
    try {
      boost::filesystem::remove(filePath);
    } catch (std::exception&) {/*file gets deleted first time but exception is still thrown*/}
  }
}


void FedRawDataInputSource::read(edm::EventPrincipal& eventPrincipal)
{
  if (fms_) fms_->setInState(evf::FastMonitoringThread::inReadEvent);
  std::unique_ptr<FEDRawDataCollection> rawData(new FEDRawDataCollection);
  edm::Timestamp tstamp = fillFEDRawDataCollection(*rawData);

  if (useL1EventID_){
    eventID_ = edm::EventID(eventRunNumber_, currentLumiSection_, L1EventID_);
    edm::EventAuxiliary aux(eventID_, processGUID(), tstamp, true,
                edm::EventAuxiliary::PhysicsTrigger);
    aux.setProcessHistoryID(processHistoryID_);
    makeEvent(eventPrincipal, aux);
  }
  else if(tcds_pointer_==nullptr){
    assert(GTPEventID_);
    eventID_ = edm::EventID(eventRunNumber_, currentLumiSection_, GTPEventID_);
    edm::EventAuxiliary aux(eventID_, processGUID(), tstamp, true,
                edm::EventAuxiliary::PhysicsTrigger);
    aux.setProcessHistoryID(processHistoryID_);
    makeEvent(eventPrincipal, aux);
  }
  else{
    const FEDHeader fedHeader(tcds_pointer_);
    tcds::Raw_v1 const* tcds = reinterpret_cast<tcds::Raw_v1 const*>(tcds_pointer_ + FEDHeader::length);
    edm::EventAuxiliary aux = evf::evtn::makeEventAuxiliary(tcds,
                         eventRunNumber_,currentLumiSection_,
                         static_cast<edm::EventAuxiliary::ExperimentType>(fedHeader.triggerType()),
                         processGUID(),!fileListLoopMode_);
    aux.setProcessHistoryID(processHistoryID_);
    makeEvent(eventPrincipal, aux);
  }



  std::unique_ptr<edm::WrapperBase> edp(new edm::Wrapper<FEDRawDataCollection>(std::move(rawData)));

  eventPrincipal.put(daqProvenanceHelper_.branchDescription(), std::move(edp),
                     daqProvenanceHelper_.dummyProvenance());

  eventsThisLumi_++;
  if (fms_) fms_->setInState(evf::FastMonitoringThread::inReadCleanup);

  //resize vector if needed
  while (streamFileTracker_.size() <= eventPrincipal.streamID())
      streamFileTracker_.push_back(-1);

  streamFileTracker_[eventPrincipal.streamID()]=currentFileIndex_;

  //this old file check runs no more often than every 10 events
  if (!((currentFile_->nProcessed_-1)%(checkEvery_))) {
    //delete files that are not in processing
    std::unique_lock<std::mutex> lkw(fileDeleteLock_);
    auto it = filesToDelete_.begin();
    while (it!=filesToDelete_.end()) {
      bool fileIsBeingProcessed = false;
      for (unsigned int i=0;i<nStreams_;i++) {
    if (it->first == streamFileTracker_.at(i)) {
        fileIsBeingProcessed = true;
        break;
    }
      }
      if (!fileIsBeingProcessed) {
        deleteFile(it->second->fileName_);
        delete it->second;
    it = filesToDelete_.erase(it);
      }
      else it++;
    }

  }
  if (chunkIsFree_) freeChunks_.push(currentFile_->chunks_[currentFile_->currentChunk_-1]);
  chunkIsFree_=false;
  if (fms_) fms_->setInState(evf::FastMonitoringThread::inNoRequest);
  return;
}

edm::Timestamp FedRawDataInputSource::fillFEDRawDataCollection(FEDRawDataCollection& rawData)
{
  edm::TimeValue_t time;
  timeval stv;
  gettimeofday(&stv,nullptr);
  time = stv.tv_sec;
  time = (time << 32) + stv.tv_usec;
  edm::Timestamp tstamp(time);

  uint32_t eventSize = event_->eventSize();
  unsigned char* event = (unsigned char*)event_->payload();
  GTPEventID_=0;
  tcds_pointer_ = nullptr;
  while (eventSize > 0) {
    assert(eventSize>=FEDTrailer::length);
    eventSize -= FEDTrailer::length;
    const FEDTrailer fedTrailer(event + eventSize);
    const uint32_t fedSize = fedTrailer.fragmentLength() << 3; //trailer length counts in 8 bytes
    assert(eventSize>=fedSize - FEDHeader::length);
    eventSize -= (fedSize - FEDHeader::length);
    const FEDHeader fedHeader(event + eventSize);
    const uint16_t fedId = fedHeader.sourceID();
    if(fedId>FEDNumbering::MAXFEDID)
    {
      throw cms::Exception("FedRawDataInputSource::fillFEDRawDataCollection") << "Out of range FED ID : " << fedId;
    }
    if (fedId == FEDNumbering::MINTCDSuTCAFEDID) {
      tcds_pointer_ = event + eventSize;
    }
    if (fedId == FEDNumbering::MINTriggerGTPFEDID) {
      if (evf::evtn::evm_board_sense(event + eventSize,fedSize))
          GTPEventID_ = evf::evtn::get(event + eventSize,true);
      else
          GTPEventID_ = evf::evtn::get(event + eventSize,false);
      //evf::evtn::evm_board_setformat(fedSize);
      const uint64_t gpsl = evf::evtn::getgpslow(event + eventSize);
      const uint64_t gpsh = evf::evtn::getgpshigh(event + eventSize);
      tstamp = edm::Timestamp(static_cast<edm::TimeValue_t> ((gpsh << 32) + gpsl));
    }
    //take event ID from GTPE FED
    if (fedId == FEDNumbering::MINTriggerEGTPFEDID && GTPEventID_==0) {
      if (evf::evtn::gtpe_board_sense(event + eventSize)) {
        GTPEventID_ = evf::evtn::gtpe_get(event + eventSize);
      }
    }
    FEDRawData& fedData = rawData.FEDData(fedId);
    fedData.resize(fedSize);
    memcpy(fedData.data(), event + eventSize, fedSize);
  }
  assert(eventSize == 0);

  return tstamp;
}

void FedRawDataInputSource::rewind_()
{}


void FedRawDataInputSource::readSupervisor()
{
  bool stop=false;
  unsigned int currentLumiSection = 0;
  //threadInit_.exchange(true,std::memory_order_acquire);

  {
    std::unique_lock<std::mutex> lk(startupLock_);
    startupCv_.notify_one();
  }

  uint32_t ls=0;
  uint32_t monLS=1;
  uint32_t lockCount=0;
  uint64_t sumLockWaitTimeUs=0.;

  while (!stop) {

    //wait for at least one free thread and chunk
    int counter=0;
    while ((workerPool_.empty() && !singleBufferMode_) || freeChunks_.empty() || readingFilesCount_>=maxBufferedFiles_)
    {
      //report state to monitoring
      if (fms_) {
        bool copy_active=false;
        for (auto j : tid_active_) if (j) copy_active=true;
        if (readingFilesCount_>=maxBufferedFiles_) fms_->setInStateSup(evf::FastMonitoringThread::inSupFileLimit);
        else if (freeChunks_.empty()) {
          if (copy_active)
            fms_->setInStateSup(evf::FastMonitoringThread::inSupWaitFreeChunkCopying);
          else
            fms_->setInStateSup(evf::FastMonitoringThread::inSupWaitFreeChunk);
        }
        else {
          if (copy_active)
            fms_->setInStateSup(evf::FastMonitoringThread::inSupWaitFreeThreadCopying);
          else
            fms_->setInStateSup(evf::FastMonitoringThread::inSupWaitFreeThread);
        }
      }
      std::unique_lock<std::mutex> lkw(mWakeup_);
      //sleep until woken up by condition or a timeout
      if (cvWakeup_.wait_for(lkw, std::chrono::milliseconds(100)) == std::cv_status::timeout) {
        counter++;
        //if (!(counter%50)) edm::LogInfo("FedRawDataInputSource") << "No free chunks or threads...";
        LogDebug("FedRawDataInputSource") << "No free chunks or threads...";
      }
      else {
        assert(!(workerPool_.empty() && !singleBufferMode_) || freeChunks_.empty());
      }
      if (quit_threads_.load(std::memory_order_relaxed) || edm::shutdown_flag.load(std::memory_order_relaxed)) {stop=true;break;}
    }

    if (stop) break;

    //look for a new file
    std::string nextFile;
    uint32_t fileSizeIndex;
    int64_t fileSizeFromJson;

    if (fms_) {
      fms_->setInStateSup(evf::FastMonitoringThread::inSupBusy);
      fms_->startedLookingForFile();
      fms_->setInStateSup(evf::FastMonitoringThread::inSupLockPolling);
    }

    evf::EvFDaqDirector::FileStatus status =  evf::EvFDaqDirector::noFile;

    int serverEventsInNewFile_=-1;

    int backoff_exp=0;

    while (status == evf::EvFDaqDirector::noFile) {
      if (quit_threads_.load(std::memory_order_relaxed) || edm::shutdown_flag.load(std::memory_order_relaxed)) {
    stop=true;
    break;
      }

      uint64_t thisLockWaitTimeUs=0.;
      if (fileListMode_) {
        //return LS if LS not set, otherwise return file
        status = getFile(ls,nextFile,fileSizeIndex,thisLockWaitTimeUs);
      }
      else if (!useFileBroker_)
        status = daqDirector_->updateFuLock(ls,nextFile,fileSizeIndex,thisLockWaitTimeUs);
      else {
        status = daqDirector_->getNextFromFileBroker(currentLumiSection,ls,nextFile,serverEventsInNewFile_,fileSizeFromJson,thisLockWaitTimeUs);
      }

      if (fms_) fms_->setInStateSup(evf::FastMonitoringThread::inSupBusy);

      //cycle through all remaining LS even if no files get assigned
      if (currentLumiSection!=ls && status==evf::EvFDaqDirector::runEnded) status=evf::EvFDaqDirector::noFile;

      //monitoring of lock wait time
      if (thisLockWaitTimeUs>0.)
        sumLockWaitTimeUs+=thisLockWaitTimeUs;
      lockCount++;
      if (ls>monLS) {
          monLS=ls;
          if (lockCount)
            if (fms_) fms_->reportLockWait(monLS,sumLockWaitTimeUs,lockCount);
          lockCount=0;
          sumLockWaitTimeUs=0;
      }

      //check again for any remaining index/EoLS files after EoR file is seen
      if ( status == evf::EvFDaqDirector::runEnded && !fileListMode_ && !useFileBroker_) {
        if (fms_) fms_->setInStateSup(evf::FastMonitoringThread::inRunEnd);
        usleep(100000);
        //now all files should have appeared in ramdisk, check again if any raw files were left behind
        status = daqDirector_->updateFuLock(ls,nextFile,fileSizeIndex,thisLockWaitTimeUs);
        if (currentLumiSection!=ls && status==evf::EvFDaqDirector::runEnded) status=evf::EvFDaqDirector::noFile;
      }

      if ( status == evf::EvFDaqDirector::runEnded) {
    fileQueue_.push(new InputFile(evf::EvFDaqDirector::runEnded));
    stop=true;
    break;
      }

      //error from filelocking function
      if (status == evf::EvFDaqDirector::runAbort) {
    fileQueue_.push(new InputFile(evf::EvFDaqDirector::runAbort, 0));
        stop=true;
        break;
      }
      //queue new lumisection
      if( getLSFromFilename_) {
        if (ls > currentLumiSection) {
          if (!useFileBroker_) {
            //file locking
            //fms_->setInStateSup(evf::FastMonitoringThread::inSupNewLumi);
        currentLumiSection = ls;
        fileQueue_.push(new InputFile(evf::EvFDaqDirector::newLumi, currentLumiSection));
          }
          else {
            //new file service
            if (currentLumiSection==0 && !alwaysStartFromFirstLS_) {
              if (ls < 100) {
                //look at last LS file on disk to start from that lumisection (only within first 100 LS)
                unsigned int lsToStart = daqDirector_->getLumisectionToStart();

                for (unsigned int nextLS=lsToStart;nextLS<=ls;nextLS++)
              fileQueue_.push(new InputFile(evf::EvFDaqDirector::newLumi, nextLS));
              }
              else {
                 //start from current LS
                 fileQueue_.push(new InputFile(evf::EvFDaqDirector::newLumi, ls));
              }
            }
            else {
              //queue all lumisections after last one seen to avoid gaps
              for (unsigned int nextLS=currentLumiSection+1;nextLS<=ls;nextLS++) {
            fileQueue_.push(new InputFile(evf::EvFDaqDirector::newLumi, nextLS));
              }
            }
        currentLumiSection = ls;
          }
        }
        //else
        if( currentLumiSection>0 && ls < currentLumiSection) {
          edm::LogError("FedRawDataInputSource") << "Got old LS ("<<ls<<") file from EvFDAQDirector! Expected LS:" << currentLumiSection<<". Aborting execution."<<std::endl;
      fileQueue_.push(new InputFile(evf::EvFDaqDirector::runAbort, 0));
      stop=true;
      break;
        }
      }

      int dbgcount=0;
      if (status == evf::EvFDaqDirector::noFile) {
        if (fms_) fms_->setInStateSup(evf::FastMonitoringThread::inSupNoFile);
    dbgcount++;
    if (!(dbgcount%20)) LogDebug("FedRawDataInputSource") << "No file for me... sleep and try again...";
        if (!useFileBroker_) usleep(100000);
        else {
          backoff_exp = std::min(4,backoff_exp); // max 1.6 seconds
          //backoff_exp=0; // disabled!
          int sleeptime  = (int) (100000. * pow(2,backoff_exp));
          usleep(sleeptime);
          backoff_exp++;
    }
      }
      else backoff_exp=0;
    }
    if ( status == evf::EvFDaqDirector::newFile ) {
      if (fms_) fms_->setInStateSup(evf::FastMonitoringThread::inSupNewFile);
      LogDebug("FedRawDataInputSource") << "The director says to grab -: " << nextFile;


      std::string rawFile;
      //file service will report raw extension
      if (useFileBroker_) rawFile = nextFile;
      else {
        boost::filesystem::path rawFilePath(nextFile);
        rawFile = rawFilePath.replace_extension(".raw").string();
      }

      struct stat st;
      int stat_res = stat(rawFile.c_str(),&st);
      if (stat_res==-1) {
        edm::LogError("FedRawDataInputSource") << "Can not stat file (" << errno << "):-"<< rawFile << std::endl;
        setExceptionState_=true;
        break;
      }
      uint64_t fileSize=st.st_size;

      if (fms_) {
        fms_->setInStateSup(evf::FastMonitoringThread::inSupBusy);
        fms_->stoppedLookingForFile(ls);
        fms_->setInStateSup(evf::FastMonitoringThread::inSupNewFile);
      }
      int eventsInNewFile;
      if (fileListMode_) {
        if (fileSize==0) eventsInNewFile=0;
        else eventsInNewFile=-1;
      }
      else {
        std::string empty;
        if (!useFileBroker_)
          eventsInNewFile = daqDirector_->grabNextJsonFileAndUnlock(nextFile);
        else
          eventsInNewFile = serverEventsInNewFile_;
        assert( eventsInNewFile>=0 );
        assert((eventsInNewFile>0) == (fileSize>0));//file without events must be empty
      }

      if (!singleBufferMode_) {
    //calculate number of needed chunks
    unsigned int neededChunks = fileSize/eventChunkSize_;
    if (fileSize%eventChunkSize_) neededChunks++;

        InputFile * newInputFile = new InputFile(evf::EvFDaqDirector::FileStatus::newFile,ls,rawFile,fileSize,neededChunks,eventsInNewFile,this);
        readingFilesCount_++;
        fileQueue_.push(newInputFile);

    for (unsigned int i=0;i<neededChunks;i++) {

          if (fms_) {
            bool copy_active=false;
            for (auto j : tid_active_) if (j) copy_active=true;
            if (copy_active)
              fms_->setInStateSup(evf::FastMonitoringThread::inSupNewFileWaitThreadCopying);
            else
              fms_->setInStateSup(evf::FastMonitoringThread::inSupNewFileWaitThread);
          }
      //get thread
      unsigned int newTid = 0xffffffff;
      while (!workerPool_.try_pop(newTid)) {
        usleep(100000);
            if (quit_threads_.load(std::memory_order_relaxed)) {stop=true;break;}
      }

          if (fms_) {
            bool copy_active=false;
            for (auto j : tid_active_) if (j) copy_active=true;
            if (copy_active)
              fms_->setInStateSup(evf::FastMonitoringThread::inSupNewFileWaitChunkCopying);
            else
              fms_->setInStateSup(evf::FastMonitoringThread::inSupNewFileWaitChunk);
          }
      InputChunk * newChunk = nullptr;
      while (!freeChunks_.try_pop(newChunk)) {
            usleep(100000);
            if (quit_threads_.load(std::memory_order_relaxed)) {stop=true;break;}
      }

          if (newChunk == nullptr) {
            //return unused tid if we received shutdown (nullptr chunk)
            if (newTid!=0xffffffff) workerPool_.push(newTid);
            stop = true;
            break;
          }
          if (stop) break;
          if (fms_) fms_->setInStateSup(evf::FastMonitoringThread::inSupNewFile);

      std::unique_lock<std::mutex> lk(mReader_);

      unsigned int toRead = eventChunkSize_;
      if (i==neededChunks-1 && fileSize%eventChunkSize_) toRead = fileSize%eventChunkSize_;
      newChunk->reset(i*eventChunkSize_,toRead,i);

      workerJob_[newTid].first=newInputFile;
      workerJob_[newTid].second=newChunk;

      //wake up the worker thread
      cvReader_[newTid]->notify_one();
    }
      }
      else {
    if (!eventsInNewFile) {
      //still queue file for lumi update
      std::unique_lock<std::mutex> lkw(mWakeup_);
      InputFile * newInputFile = new InputFile(evf::EvFDaqDirector::FileStatus::newFile,ls,rawFile,0,0,0,this);
          readingFilesCount_++;
      fileQueue_.push(newInputFile);
      cvWakeup_.notify_one();
      break;
    }
    //in single-buffer mode put single chunk in the file and let the main thread read the file
    InputChunk * newChunk;
    //should be available immediately
    while(!freeChunks_.try_pop(newChunk)) {
          usleep(100000);
          if (quit_threads_.load(std::memory_order_relaxed)) break;
        }

        std::unique_lock<std::mutex> lkw(mWakeup_);

        unsigned int toRead = eventChunkSize_;
        if (fileSize%eventChunkSize_) toRead = fileSize%eventChunkSize_;
        newChunk->reset(0,toRead,0);
        newChunk->readComplete_=true;

        //push file and wakeup main thread
        InputFile * newInputFile = new InputFile(evf::EvFDaqDirector::FileStatus::newFile,ls,rawFile,fileSize,1,eventsInNewFile,this);
        newInputFile->chunks_[0]=newChunk;
        readingFilesCount_++;
        fileQueue_.push(newInputFile);
        cvWakeup_.notify_one();
      }
    }
  }
  if (fms_) fms_->setInStateSup(evf::FastMonitoringThread::inRunEnd);
  //make sure threads finish reading
  unsigned numFinishedThreads = 0;
  while (numFinishedThreads < workerThreads_.size()) {
    unsigned int tid;
    while (!workerPool_.try_pop(tid)) {usleep(10000);}
    std::unique_lock<std::mutex> lk(mReader_);
    thread_quit_signal[tid]=true;
    cvReader_[tid]->notify_one();
    numFinishedThreads++;
  }
  for (unsigned int i=0;i<workerThreads_.size();i++) {
    workerThreads_[i]->join();
    delete workerThreads_[i];
  }
}

void FedRawDataInputSource::readWorker(unsigned int tid)
{
  bool init = true;
  threadInit_.exchange(true,std::memory_order_acquire);

  while (true) {

    tid_active_[tid]=false;
    std::unique_lock<std::mutex> lk(mReader_);
    workerJob_[tid].first=nullptr;
    workerJob_[tid].first=nullptr;

    assert(!thread_quit_signal[tid]);//should never get it here
    workerPool_.push(tid);

    if (init) {
      std::unique_lock<std::mutex> lk(startupLock_);
      init = false;
      startupCv_.notify_one();
    }
    cvReader_[tid]->wait(lk);

    if (thread_quit_signal[tid])  return;
    tid_active_[tid]=true;

    InputFile * file;
    InputChunk * chunk;

    assert(workerJob_[tid].first!=nullptr && workerJob_[tid].second!=nullptr);

    file = workerJob_[tid].first;
    chunk = workerJob_[tid].second;

    int fileDescriptor = open(file->fileName_.c_str(), O_RDONLY);
    off_t pos = 0;


    if (fileDescriptor<0) {
      edm::LogError("FedRawDataInputSource") <<
      "readWorker failed to open file -: " << file->fileName_ << " fd:" << fileDescriptor <<" error: " << strerror(errno);
      setExceptionState_=true;
      continue;
    }
    pos = lseek(fileDescriptor,chunk->offset_,SEEK_SET);
    if (pos==-1) {
      edm::LogError("FedRawDataInputSource") <<
      "readWorker failed to seek file -: " << file->fileName_ << " fd:" << fileDescriptor <<
      " to offset " << chunk->offset_ << " error: " << strerror(errno);
      setExceptionState_=true;
      continue;
    }

    LogDebug("FedRawDataInputSource") << "Reader thread opened file -: TID: " << tid << " file: " << file->fileName_ << " at offset " << pos;

    unsigned int bufferLeft = 0;
    auto start = std::chrono::high_resolution_clock::now();
    for (unsigned int i=0;i<readBlocks_;i++)
    {
      const ssize_t last = ::read(fileDescriptor,( void*) (chunk->buf_+bufferLeft), eventChunkBlock_);
      if (last<0) {
          edm::LogError("FedRawDataInputSource") <<
          "readWorker failed to read file -: " << file->fileName_ << " fd:" << fileDescriptor << " error: " << strerror(errno);
          setExceptionState_=true;
          break;
      }
      if ( last > 0 )
    bufferLeft+=last;
      if (last < eventChunkBlock_) {
    if (!(chunk->usedSize_==i*eventChunkBlock_+last)) {
          edm::LogError("FedRawDataInputSource") <<
          "readWorker failed to read file -: " << file->fileName_ << " fd:" << fileDescriptor << " last:" << last <<
          " expectedChunkSize:" << chunk->usedSize_ << " readChunkSize:" << (i*eventChunkBlock_+last) << " error: " << strerror(errno);
          setExceptionState_=true;
        }
    break;
      }
    }
    if (setExceptionState_) continue;

    auto end = std::chrono::high_resolution_clock::now();
    auto diff = end-start;
    std::chrono::milliseconds msec = std::chrono::duration_cast<std::chrono::milliseconds>(diff);
    LogDebug("FedRawDataInputSource") << " finished reading block -: " << (bufferLeft >> 20) << " MB" << " in " << msec.count() << " ms ("<< (bufferLeft >> 20)/double(msec.count())<<" GB/s)";
    close(fileDescriptor);

    if (detectedFRDversion_==0 && chunk->offset_==0) detectedFRDversion_=*((uint32*)chunk->buf_);
    assert(detectedFRDversion_<=5);
    chunk->readComplete_=true;//this is atomic to secure the sequential buffer fill before becoming available for processing)
    file->chunks_[chunk->fileIndex_]=chunk;//put the completed chunk in the file chunk vector at predetermined index

  }
}

void FedRawDataInputSource::threadError()
{
  quit_threads_=true;
  throw cms::Exception("FedRawDataInputSource:threadError") << " file reader thread error ";

}


inline bool InputFile::advance(unsigned char* & dataPosition, const size_t size)
{
  //wait for chunk
  while (!waitForChunk(currentChunk_)) {
    usleep(100000);
    if (parent_->exceptionState()) parent_->threadError();
  }

  dataPosition = chunks_[currentChunk_]->buf_+ chunkPosition_;
  size_t currentLeft = chunks_[currentChunk_]->size_ - chunkPosition_;

  if (currentLeft < size) {

    //we need next chunk
    while (!waitForChunk(currentChunk_+1)) {
      usleep(100000);
      if (parent_->exceptionState()) parent_->threadError();
    }
    //copy everything to beginning of the first chunk
    dataPosition-=chunkPosition_;
    assert(dataPosition==chunks_[currentChunk_]->buf_);
    memmove(chunks_[currentChunk_]->buf_, chunks_[currentChunk_]->buf_+chunkPosition_, currentLeft);
    memcpy(chunks_[currentChunk_]->buf_ + currentLeft, chunks_[currentChunk_+1]->buf_, size - currentLeft);
    //set pointers at the end of the old data position
    bufferPosition_+=size;
    chunkPosition_=size-currentLeft;
    currentChunk_++;
    return true;
  }
  else {
    chunkPosition_+=size;
    bufferPosition_+=size;
    return false;
  }
}

inline void InputFile::moveToPreviousChunk(const size_t size, const size_t offset)
{
  //this will fail in case of events that are too large
  assert(size < chunks_[currentChunk_]->size_ - chunkPosition_);
  assert(size - offset < chunks_[currentChunk_]->size_);
  memcpy(chunks_[currentChunk_-1]->buf_+offset,chunks_[currentChunk_]->buf_+chunkPosition_,size);
  chunkPosition_+=size;
  bufferPosition_+=size;
}

inline void InputFile::rewindChunk(const size_t size) {
  chunkPosition_-=size;
  bufferPosition_-=size;
}

//single-buffer mode file reading
void FedRawDataInputSource::readNextChunkIntoBuffer(InputFile *file)
{

  if (fileDescriptor_<0) {
    fileDescriptor_ = open(file->fileName_.c_str(), O_RDONLY);
    bufferInputRead_ = 0;
    //off_t pos = lseek(fileDescriptor,0,SEEK_SET);
    if (fileDescriptor_>=0)
      LogDebug("FedRawDataInputSource") << "opened file -: " << std::endl << file->fileName_;
    else
    {
      throw cms::Exception("FedRawDataInputSource:readNextChunkIntoBuffer") << "failed to open file " << std::endl
            << file->fileName_ << " fd:" << fileDescriptor_;
    }
  }

  if (file->chunkPosition_ == 0) { //in the rare case the last byte barely fit
    uint32_t existingSize = 0;
    for (unsigned int i=0;i<readBlocks_;i++)
    {
      const ssize_t last = ::read(fileDescriptor_,( void*) (file->chunks_[0]->buf_ + existingSize), eventChunkBlock_);
      bufferInputRead_+=last;
      existingSize+=last;
    }
  }
  else {
    const uint32_t chunksize = file->chunkPosition_;
    const uint32_t blockcount=chunksize/eventChunkBlock_;
    const uint32_t leftsize = chunksize%eventChunkBlock_;
    uint32_t existingSize = eventChunkSize_ - file->chunkPosition_;
    memmove((void*) file->chunks_[0]->buf_, file->chunks_[0]->buf_ + file->chunkPosition_, existingSize);

    for (uint32_t i=0;i<blockcount;i++) {
      const ssize_t last = ::read(fileDescriptor_,( void*) (file->chunks_[0]->buf_ + existingSize), eventChunkBlock_);
      bufferInputRead_+=last;
      existingSize+=last;
    }
    if (leftsize) {
      const ssize_t last = ::read(fileDescriptor_,( void*)( file->chunks_[0]->buf_ + existingSize ), leftsize);
      bufferInputRead_+=last;
    }
    file->chunkPosition_=0;//data was moved to beginning of the chunk
  }
  if (bufferInputRead_ == file->fileSize_) { // no more data in this file
    if (fileDescriptor_!=-1)
    {
      LogDebug("FedRawDataInputSource") << "Closing input file -: " << std::endl << file->fileName_;
      close(fileDescriptor_);
      fileDescriptor_=-1;
    }
  }
}


void FedRawDataInputSource::reportEventsThisLumiInSource(unsigned int lumi,unsigned int events)
{

  std::lock_guard<std::mutex> lock(monlock_);
  auto itr = sourceEventsReport_.find(lumi);
  if (itr!=sourceEventsReport_.end())
    itr->second+=events;
  else
    sourceEventsReport_[lumi]=events;
}

std::pair<bool,unsigned int> FedRawDataInputSource::getEventReport(unsigned int lumi, bool erase)
{
  std::lock_guard<std::mutex> lock(monlock_);
  auto itr = sourceEventsReport_.find(lumi);
  if (itr!=sourceEventsReport_.end()) {
    std::pair<bool,unsigned int> ret(true,itr->second);
    if (erase)
      sourceEventsReport_.erase(itr);
    return ret;
  }
  else
    return std::pair<bool,unsigned int>(false,0);
}

long FedRawDataInputSource::initFileList()
{
  std::sort(fileNames_.begin(),fileNames_.end(),
            [](std::string a, std::string b) {
              if (a.rfind("/")!=std::string::npos) a=a.substr(a.rfind("/"));
              if (b.rfind("/")!=std::string::npos) b=b.substr(b.rfind("/"));
              return b > a;});

  if (!fileNames_.empty()) {
    //get run number from first file in the vector
    boost::filesystem::path fileName = fileNames_[0];
    std::string fileStem = fileName.stem().string();
    auto end = fileStem.find("_");
    if (fileStem.find("run")==0) {
      std::string runStr = fileStem.substr(3,end-3);
      try {
        //get long to support test run numbers < 2^32
        long rval = boost::lexical_cast<long>(runStr);
        edm::LogInfo("FedRawDataInputSource") << "Autodetected run number in fileListMode -: "<< rval;
        return rval;
      }
      catch( boost::bad_lexical_cast const& ) {
        edm::LogWarning("FedRawDataInputSource") << "Unable to autodetect run number in fileListMode from file -: "<< fileName;
      }
    }
  }
  return -1;
}

evf::EvFDaqDirector::FileStatus FedRawDataInputSource::getFile(unsigned int& ls, std::string& nextFile, uint32_t& fsize, uint64_t& lockWaitTime)
{
  if (fileListIndex_ < fileNames_.size()) {
          nextFile = fileNames_[fileListIndex_];
          if (nextFile.find("file://")==0) nextFile=nextFile.substr(7);
          else if (nextFile.find("file:")==0) nextFile=nextFile.substr(5);
          boost::filesystem::path fileName = nextFile;
          std::string fileStem = fileName.stem().string();
          if (fileStem.find("ls")) fileStem = fileStem.substr(fileStem.find("ls")+2);
          if (fileStem.find("_")) fileStem = fileStem.substr(0,fileStem.find("_"));

          if (!fileListLoopMode_)
            ls = boost::lexical_cast<unsigned int>(fileStem);
          else //always starting from LS 1 in loop mode
            ls = 1 + loopModeIterationInc_;

          //fsize = 0;
          //lockWaitTime = 0;
          fileListIndex_++;
          return evf::EvFDaqDirector::newFile;
  }
  else {
    if (!fileListLoopMode_)
      return evf::EvFDaqDirector::runEnded;
    else {
      //loop through files until interrupted
      loopModeIterationInc_++;
      fileListIndex_=0;
      return getFile(ls,nextFile,fsize,lockWaitTime);
    }
  }
}