CPUCrunchSvc.h

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/***********************************************************************************\
* (c) Copyright 1998-2019 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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* granted to it by virtue of its status as an Intergovernmental Organization        *
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#ifndef GAUDISVC_CPUCRUNCHSVC_H
#define GAUDISVC_CPUCRUNCHSVC_H 1

#include "GaudiKernel/ClassID.h"
#include "GaudiKernel/Service.h"
#include "GaudiKernel/StatusCode.h"

#include "GaudiKernel/ICPUCrunchSvc.h"
#include <chrono>
#include <string>
#include <vector>

class CPUCrunchSvc : public extends<Service, ICPUCrunchSvc> {

public:
  CPUCrunchSvc( const std::string& name, ISvcLocator* svc );

public:
  virtual StatusCode initialize() override;

public:
  // number of seconds to CPUCrunch
  std::chrono::milliseconds crunch_for( const std::chrono::milliseconds& crunchtime ) const override;

private:
  void         calibrate();
  unsigned int getNCaliIters( std::chrono::microseconds runtime ) const;
  void         findPrimes( unsigned int ) const;

  std::vector<unsigned int> m_times_vect;

  Gaudi::Property<std::vector<unsigned int>> m_niters_vect{
      this, "NIterationsVect", {}, "Number of iterations for the calibration."};
  Gaudi::Property<bool>         m_shortCalib{this, "shortCalib", false, "Enable coarse grained calibration"};
  Gaudi::Property<unsigned int> m_minCalibTime{this, "minCalibTime", 0,
                                               "Minimum number of milliseconds to do calibration"};
  Gaudi::Property<int>          m_numCalibRuns{this, "numCalibRuns", 1, "Number of times to do calibration run"};
  Gaudi::Property<float>        m_corrFact{this, "calibCorrectionFactor", 1.,
                                    "Calibration correction factor to take into account things like turbo boost"};
};

#endif