MatacqProducer::PosEstimator Class Reference

Public Member Functions
int	eventLength () const
int	firstOrbit () const
void	init (MatacqProducer *mp)
bool	invalid () const
int64_t	pos (int orb) const
	PosEstimator ()
void	verbosity (int verb)

Private Attributes
int	eventLength_
int	firstOrbit_
bool	invalid_
int	orbitStepMean_
int	verbosity_

Detailed Description

Estimates matacq event position in a file from its orbit id. This estimator requires that every event in the file has the same length. A linear extrapolation of pos=f(orbit) function from first and last event is performed. It gives only a rough estimate, relevant only to initiliaze the event search.

Definition at line 78 of file MatacqProducer.cc.

Constructor & Destructor Documentation

PosEstimator()

MatacqProducer::PosEstimator::PosEstimator ( )

inline

Definition at line 83 of file MatacqProducer.cc.

: eventLength_(0), orbitStepMean_(0), firstOrbit_(0), invalid_(true), verbosity_(0) {}

Member Function Documentation

eventLength()

int MatacqProducer::PosEstimator::eventLength ( ) const

inline

Definition at line 87 of file MatacqProducer.cc.

References eventLength_.

Referenced by MatacqProducer::getMatacqEvent().

{ return eventLength_; }

firstOrbit()

int MatacqProducer::PosEstimator::firstOrbit ( ) const

inline

Definition at line 88 of file MatacqProducer.cc.

References firstOrbit_.

{ return firstOrbit_; }

init()

void MatacqProducer::PosEstimator::init

(

MatacqProducer *

mp

)

Definition at line 1037 of file MatacqProducer.cc.

References gather_cfg::cout, data, eventLength_, firstOrbit_, MatacqRawEvent::getDccLen(), MatacqRawEvent::getOrbitId(), invalid_, dqmdumpme::last, MatacqProducer::mread(), MatacqProducer::mrewind(), MatacqProducer::mseek(), MatacqProducer::msize(), createIOVlist::nEvents, now(), orbitStepMean_, alignCSCRings::s, and verbosity_.

Referenced by MatacqProducer::getMatacqFile().

                                                        {
  mp->mrewind();

  const size_t headerSize = 8 * 8;
  unsigned char data[headerSize];
  if (!mp->mread((char*)data, headerSize)) {
    if (verbosity_)
      cout << "[Matacq " << now() << "] reached end of file!\n";
    firstOrbit_ = eventLength_ = orbitStepMean_ = 0;
    return;
  } else {
    firstOrbit_ = MatacqRawEvent::getOrbitId(data, headerSize);
    eventLength_ = MatacqRawEvent::getDccLen(data, headerSize);
    if (verbosity_ > 1)
      cout << "[Matacq " << now() << "] First event orbit: " << firstOrbit_ << " event length: " << eventLength_
           << "*8 byte\n";
  }

  mp->mrewind();

  if (eventLength_ == 0) {
    if (verbosity_)
      cout << "[Matacq " << now() << "] event length is null!" << endl;
    return;
  }

  filepos_t s = -1;
  mp->msize(s);

  if (s == -1) {
    if (verbosity_)
      cout << "[Matacq " << now() << "] File is missing!" << endl;
    orbitStepMean_ = 0;
    return;
  } else if (s == 0) {
    if (verbosity_)
      cout << "[Matacq " << now() << "] File is empty!" << endl;
    orbitStepMean_ = 0;
    return;
  }

  //number of complete events:
  const unsigned nEvents = s / eventLength_ / 8;

  if (verbosity_ > 1)
    cout << "[Matacq " << now() << "] File size: " << s << " Number of events: " << nEvents << endl;

  //position of last complete events:
  off_t last = (nEvents - 1) * (off_t)eventLength_ * 8;
  mp->mseek(last,
            SEEK_SET,
            "Moving to beginning of last complete "
            "matacq event");
  if (!mp->mread((char*)data, headerSize, "Reading matacq header", true)) {
    LogWarning("Matacq") << "Fast matacq event retrieval failure. "
                            "Falling back to safe retrieval mode.";
    orbitStepMean_ = 0;
  }

  int32_t lastOrb = MatacqRawEvent::getOrbitId(data, headerSize);
  int32_t lastLen = MatacqRawEvent::getDccLen(data, headerSize);

  if (verbosity_ > 1)
    cout << "[Matacq " << now() << "] Last event orbit: " << lastOrb << " last event length: " << lastLen << endl;

  //some consistency check
  if (lastLen != eventLength_) {
    LogWarning("Matacq")
        //throw cms::Exception("Matacq")
        << "Fast matacq event retrieval failure: it looks like "
           "the matacq file contains events of different sizes.";
    //      " Falling back to safe retrieval mode.";
    invalid_ = false;      //true;
    orbitStepMean_ = 112;  //0;
    return;
  }

  orbitStepMean_ = (lastOrb - firstOrbit_) / nEvents;

  if (verbosity_ > 1)
    cout << "[Matacq " << now() << "] Orbit step mean: " << orbitStepMean_ << "\n";

  invalid_ = false;
}

invalid()

bool MatacqProducer::PosEstimator::invalid ( ) const

inline

Definition at line 85 of file MatacqProducer.cc.

References invalid_.

Referenced by MatacqProducer::getMatacqEvent().

{ return invalid_; }

pos()

int64_t MatacqProducer::PosEstimator::pos

(

int

orb

)

const

Definition at line 1122 of file MatacqProducer.cc.

References gather_cfg::cout, now(), alignCSCRings::r, and MatacqProducer::verbosity_.

Referenced by MatacqProducer::getMatacqEvent().

                                                     {
  if (orb < firstOrbit_)
    return -1;
  uint64_t r = orbitStepMean_ != 0 ? (((uint64_t)(orb - firstOrbit_)) / orbitStepMean_) * eventLength_ * 8 : 0;
  if (verbosity_ > 2)
    cout << "[Matacq " << now() << "] Estimated Position for orbit  " << orb << ": " << r << endl;
  return r;
}

verbosity()

void MatacqProducer::PosEstimator::verbosity ( int  verb )

inline

Definition at line 89 of file MatacqProducer.cc.

References verbosity_.

Referenced by MatacqProducer::MatacqProducer().

{ verbosity_ = verb; }

Member Data Documentation

eventLength_

int MatacqProducer::PosEstimator::eventLength_

private

Definition at line 92 of file MatacqProducer.cc.

Referenced by eventLength(), and init().

firstOrbit_

int MatacqProducer::PosEstimator::firstOrbit_

private

Definition at line 94 of file MatacqProducer.cc.

Referenced by firstOrbit(), and init().

invalid_

bool MatacqProducer::PosEstimator::invalid_

private

Definition at line 95 of file MatacqProducer.cc.

Referenced by init(), and invalid().

orbitStepMean_

int MatacqProducer::PosEstimator::orbitStepMean_

private

Definition at line 93 of file MatacqProducer.cc.

Referenced by init().

verbosity_

int MatacqProducer::PosEstimator::verbosity_

private

Definition at line 96 of file MatacqProducer.cc.

Referenced by init(), and verbosity().