RunManagerMTWorker.cc

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#include "SimG4Core/Application/interface/RunManagerMTWorker.h"
#include "SimG4Core/Application/interface/RunManagerMT.h"
#include "SimG4Core/Application/interface/SimRunInterface.h"
#include "SimG4Core/Application/interface/RunAction.h"
#include "SimG4Core/Application/interface/EventAction.h"
#include "SimG4Core/Application/interface/StackingAction.h"
#include "SimG4Core/Application/interface/TrackingAction.h"
#include "SimG4Core/Application/interface/SteppingAction.h"
#include "SimG4Core/Application/interface/CustomUIsession.h"
#include "SimG4Core/Application/interface/CustomUIsessionThreadPrefix.h"
#include "SimG4Core/Application/interface/CustomUIsessionToFile.h"
#include "SimG4Core/Application/interface/ExceptionHandler.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/Framework/interface/ConsumesCollector.h"
#include "FWCore/Concurrency/interface/FunctorTask.h"

#include "FWCore/ServiceRegistry/interface/Service.h"
#include "SimG4Core/Notification/interface/G4SimEvent.h"
#include "SimG4Core/Notification/interface/SimActivityRegistry.h"
#include "SimG4Core/Notification/interface/SimG4Exception.h"
#include "SimG4Core/Notification/interface/BeginOfJob.h"
#include "SimG4Core/Notification/interface/CMSSteppingVerbose.h"
#include "SimG4Core/Watcher/interface/SimWatcherFactory.h"

#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Framework/interface/ESTransientHandle.h"
#include "Geometry/Records/interface/IdealGeometryRecord.h"
#include "DetectorDescription/Core/interface/DDCompactView.h"

#include "SimG4Core/Geometry/interface/DDDWorld.h"
#include "SimG4Core/MagneticField/interface/FieldBuilder.h"
#include "SimG4Core/MagneticField/interface/CMSFieldManager.h"

#include "MagneticField/Engine/interface/MagneticField.h"
#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"

#include "SimDataFormats/GeneratorProducts/interface/HepMCProduct.h"

#include "SimG4Core/Physics/interface/PhysicsList.h"

#include "SimG4Core/SensitiveDetector/interface/AttachSD.h"
#include "SimG4Core/SensitiveDetector/interface/SensitiveTkDetector.h"
#include "SimG4Core/SensitiveDetector/interface/SensitiveCaloDetector.h"

#include "G4Event.hh"
#include "G4Run.hh"
#include "G4SystemOfUnits.hh"
#include "G4Threading.hh"
#include "G4UImanager.hh"
#include "G4WorkerThread.hh"
#include "G4WorkerRunManagerKernel.hh"
#include "G4StateManager.hh"
#include "G4TransportationManager.hh"

#include <atomic>
#include <thread>
#include <sstream>
#include <vector>

// from https://hypernews.cern.ch/HyperNews/CMS/get/edmFramework/3302/2.html
namespace {
  std::atomic<int> thread_counter{ 0 };

  int get_new_thread_index() { 
    return thread_counter++;
  }

  thread_local int s_thread_index = get_new_thread_index();

  int getThreadIndex() { return s_thread_index; }

  void createWatchers(const edm::ParameterSet& iP,
                      SimActivityRegistry* iReg,
                      std::vector<std::shared_ptr<SimWatcher> >& oWatchers,
                      std::vector<std::shared_ptr<SimProducer> >& oProds,
                      int thisThreadID
                      )
  {
    if(!iP.exists("Watchers")) { return; }

    std::vector<edm::ParameterSet> watchers = 
      iP.getParameter<std::vector<edm::ParameterSet> >("Watchers");

    for(auto & watcher : watchers) {
      std::unique_ptr<SimWatcherMakerBase> maker(
        SimWatcherFactory::get()->create(watcher.getParameter<std::string>("type"))
      );
      if(maker==nullptr) {
        throw edm::Exception(edm::errors::Configuration)
      << "Unable to find the requested Watcher <"
      << watcher.getParameter<std::string>("type");
      }
      std::shared_ptr<SimWatcher> watcherTemp;
      std::shared_ptr<SimProducer> producerTemp;
      maker->make(watcher,*(iReg),watcherTemp,producerTemp);
      oWatchers.push_back(watcherTemp);
      if(producerTemp) {
        oProds.push_back(producerTemp);
      }
    }
  }

  std::atomic<int> active_tlsdata{0};
  std::atomic<bool> tls_shutdown_timeout{false};
  std::atomic<int> n_tls_shutdown_task{0};
}

struct RunManagerMTWorker::TLSData {
  std::unique_ptr<G4RunManagerKernel> kernel; //must be deleted last
  std::unique_ptr<CustomUIsession> UIsession;
  std::unique_ptr<RunAction> userRunAction;
  std::unique_ptr<SimRunInterface> runInterface;
  std::unique_ptr<SimActivityRegistry> registry;
  std::unique_ptr<SimTrackManager> trackManager;
  std::vector<SensitiveTkDetector*> sensTkDets;
  std::vector<SensitiveCaloDetector*> sensCaloDets;
  std::vector<std::shared_ptr<SimWatcher> > watchers;
  std::vector<std::shared_ptr<SimProducer> > producers;
  //G4Run can only be deleted if there is a G4RunManager
  // on the thread where the G4Run is being deleted,
  // else it causes a segmentation fault
  G4Run* currentRun = nullptr;
  std::unique_ptr<G4Event> currentEvent;
  edm::RunNumber_t currentRunNumber = 0;
  bool threadInitialized = false;
  bool runTerminated = false;

  TLSData() {
    ++active_tlsdata;
  }

  ~TLSData() {
    --active_tlsdata;
  }
};

//This can not be a smart pointer since we must delete some of the members
// before leaving main() else we get a segmentation fault caused by accessing
// other 'singletons' after those singletons have been deleted. Instead we
// atempt to delete all TLS at RunManagerMTWorker destructor. If that fails for
// some reason, it is better to leak than cause a crash.
thread_local RunManagerMTWorker::TLSData* RunManagerMTWorker::m_tls{nullptr};

RunManagerMTWorker::RunManagerMTWorker(const edm::ParameterSet& iConfig, edm::ConsumesCollector&& iC):
  m_generator(iConfig.getParameter<edm::ParameterSet>("Generator")),
  m_InToken(iC.consumes<edm::HepMCProduct>(iConfig.getParameter<edm::ParameterSet>("Generator").getParameter<edm::InputTag>("HepMCProductLabel"))),
  m_theLHCTlinkToken(iC.consumes<edm::LHCTransportLinkContainer>(iConfig.getParameter<edm::InputTag>("theLHCTlinkTag"))),
  m_nonBeam(iConfig.getParameter<bool>("NonBeamEvent")),
  m_pUseMagneticField(iConfig.getParameter<bool>("UseMagneticField")),
  m_EvtMgrVerbosity(iConfig.getUntrackedParameter<int>("G4EventManagerVerbosity",0)),
  m_pField(iConfig.getParameter<edm::ParameterSet>("MagneticField")),
  m_pRunAction(iConfig.getParameter<edm::ParameterSet>("RunAction")),
  m_pEventAction(iConfig.getParameter<edm::ParameterSet>("EventAction")),
  m_pStackingAction(iConfig.getParameter<edm::ParameterSet>("StackingAction")),
  m_pTrackingAction(iConfig.getParameter<edm::ParameterSet>("TrackingAction")),
  m_pSteppingAction(iConfig.getParameter<edm::ParameterSet>("SteppingAction")),
  m_pCustomUIsession(iConfig.getUntrackedParameter<edm::ParameterSet>("CustomUIsession")),
  m_p(iConfig),
  m_simEvent(nullptr),
  m_sVerbose(nullptr)
{
  std::vector<edm::ParameterSet> watchers = 
    iConfig.getParameter<std::vector<edm::ParameterSet> >("Watchers");
  m_hasWatchers = (watchers.empty()) ? false : true;
  initializeTLS();
}

RunManagerMTWorker::~RunManagerMTWorker() {
  if(m_tls && !m_tls->runTerminated) { terminateRun(); }

  ++n_tls_shutdown_task;
  resetTLS();

  {
    //make sure all tasks are done before continuing
    timespec s;
    s.tv_sec=0;
    s.tv_nsec=10000;
    while(n_tls_shutdown_task != 0) { nanosleep(&s,nullptr); }
  }
}

void RunManagerMTWorker::resetTLS() {
  delete m_tls;
  m_tls=nullptr;

  if(active_tlsdata != 0 and not tls_shutdown_timeout) {
    ++n_tls_shutdown_task;
    //need to run tasks on each thread which has set the tls
    auto task = edm::make_functor_task(tbb::task::allocate_root(), [] () {
        resetTLS();
      });
    tbb::task::enqueue(*task);
    timespec s;
    s.tv_sec=0;
    s.tv_nsec=10000;
    //we do not want this thread to be used for a new task since it
    // has already cleared its structures. In order to fill all TBB
    // threads we wait for all TLSes to clear
    int count = 0;
    while(active_tlsdata.load() != 0 and ++count < 1000) { nanosleep(&s,nullptr);}
    if(count >= 1000) {
      tls_shutdown_timeout=true;
    }
  }
  --n_tls_shutdown_task;
}

void RunManagerMTWorker::endRun() {
  terminateRun();
}

void RunManagerMTWorker::initializeTLS() {
  if(m_tls) { return; }
  
  m_tls = new TLSData() ;
  m_tls->registry.reset(new SimActivityRegistry());

  edm::Service<SimActivityRegistry> otherRegistry;
  //Look for an outside SimActivityRegistry
  // this is used by the visualization code
  int thisID = getThreadIndex();
  if(otherRegistry){
    m_tls->registry->connect(*otherRegistry);
    if(thisID > 0) {
      throw edm::Exception(edm::errors::Configuration) << "SimActivityRegistry service (i.e. visualization) is not supported for more than 1 thread. If this use case is needed, RunManagerMTWorker has to be updated.";
    }
  }
  if(m_hasWatchers) {
    createWatchers(m_p, m_tls->registry.get(), m_tls->watchers, m_tls->producers, thisID);
  }
}

void RunManagerMTWorker::initializeThread(RunManagerMT& runManagerMaster, const edm::EventSetup& es) {
  // I guess everything initialized here should be in thread_local storage
  initializeTLS();

  int thisID = getThreadIndex();

  edm::LogVerbatim("SimG4CoreApplication")
    << "RunManagerMTWorker::initializeThread " << thisID;

  // Initialize per-thread output
  G4Threading::G4SetThreadId( thisID );
  G4UImanager::GetUIpointer()->SetUpForAThread( thisID );
  const std::string& uitype = m_pCustomUIsession.getUntrackedParameter<std::string>("Type");
  if(uitype == "MessageLogger") {
    m_tls->UIsession.reset(new CustomUIsession());
  }
  else if(uitype == "MessageLoggerThreadPrefix") {
    m_tls->UIsession.reset(new CustomUIsessionThreadPrefix(m_pCustomUIsession.getUntrackedParameter<std::string>("ThreadPrefix"), thisID));
  }
  else if(uitype == "FilePerThread") {
    m_tls->UIsession.reset(new CustomUIsessionToFile(m_pCustomUIsession.getUntrackedParameter<std::string>("ThreadFile"), thisID));
  }
  else {
    throw edm::Exception(edm::errors::Configuration) 
      << "Invalid value of CustomUIsession.Type '" << uitype 
      << "', valid are MessageLogger, MessageLoggerThreadPrefix, FilePerThread";
  }

  // Initialize worker part of shared resources (geometry, physics)
  G4WorkerThread::BuildGeometryAndPhysicsVector();

  // Create worker run manager
  m_tls->kernel.reset(G4WorkerRunManagerKernel::GetRunManagerKernel());
  if(!m_tls->kernel) { m_tls->kernel.reset(new G4WorkerRunManagerKernel()); }

  // Define G4 exception handler
  G4StateManager::GetStateManager()->SetExceptionHandler(new ExceptionHandler());

  // Set the geometry for the worker, share from master
  DDDWorld::WorkerSetAsWorld(runManagerMaster.world().GetWorldVolumeForWorker());

  // we need the track manager now
  m_tls->trackManager.reset(new SimTrackManager());

  // Get DDCompactView, or would it be better to get the object from
  // runManagerMaster instead of EventSetup in here?
  edm::ESTransientHandle<DDCompactView> pDD;
  es.get<IdealGeometryRecord>().get(pDD);

  // setup the magnetic field
  if (m_pUseMagneticField)
    {
      const GlobalPoint g(0.,0.,0.);

      edm::ESHandle<MagneticField> pMF;
      es.get<IdealMagneticFieldRecord>().get(pMF);

      sim::FieldBuilder fieldBuilder(pMF.product(), m_pField);
      CMSFieldManager* fieldManager = new CMSFieldManager();
      G4TransportationManager * tM =
    G4TransportationManager::GetTransportationManager();
      tM->SetFieldManager(fieldManager);
      fieldBuilder.build( fieldManager, tM->GetPropagatorInField());
    }

  // attach sensitive detector
  AttachSD attach;
  auto  sensDets =
    attach.create(*pDD, runManagerMaster.catalog(), m_p,
                  m_tls->trackManager.get(),
                  *(m_tls->registry.get()));

  m_tls->sensTkDets.swap(sensDets.first);
  m_tls->sensCaloDets.swap(sensDets.second);

  edm::LogVerbatim("SimG4CoreApplication")
    << " RunManagerMTWorker: Sensitive Detector building finished; found "
    << m_tls->sensTkDets.size() << " Tk type Producers, and "
    << m_tls->sensCaloDets.size() << " Calo type producers ";

  // Set the physics list for the worker, share from master
  PhysicsList *physicsList = runManagerMaster.physicsListForWorker();

  edm::LogVerbatim("SimG4CoreApplication") 
    << "RunManagerMTWorker: start initialisation of PhysicsList for the thread";

  // Geant4 UI commands in PreInit state
  if(!runManagerMaster.G4Commands().empty()) {
    G4cout << "RunManagerMTWorker: Requested UI commands: " << G4endl;
    for(const std::string& command: runManagerMaster.G4Commands()) {
      G4cout << "          " << command << G4endl;
      G4UImanager::GetUIpointer()->ApplyCommand(command);
    }
  }
  G4StateManager::GetStateManager()->SetNewState(G4State_Init);

  physicsList->InitializeWorker();
  m_tls->kernel->SetPhysics(physicsList);
  m_tls->kernel->InitializePhysics();

  const bool kernelInit = m_tls->kernel->RunInitialization();
  if(!kernelInit) {
    throw edm::Exception(edm::errors::Configuration)
      << "RunManagerMTWorker: Geant4 kernel initialization failed";
  }
  //tell all interesting parties that we are beginning the job
  BeginOfJob aBeginOfJob(&es);
  m_tls->registry->beginOfJobSignal_(&aBeginOfJob);

  G4int sv = m_p.getParameter<int>("SteppingVerbosity");
  G4double elim = m_p.getParameter<double>("StepVerboseThreshold")*CLHEP::GeV;
  std::vector<int> ve = m_p.getParameter<std::vector<int> >("VerboseEvents");
  std::vector<int> vn = m_p.getParameter<std::vector<int> >("VertexNumber");
  std::vector<int> vt = m_p.getParameter<std::vector<int> >("VerboseTracks");

  if(sv > 0) {
    m_sVerbose.reset(new CMSSteppingVerbose(sv, elim, ve, vn, vt));
  }
  initializeUserActions();

  edm::LogVerbatim("SimG4CoreApplication")
    << "RunManagerMTWorker::initializeThread done for the thread " << thisID;

  G4StateManager::GetStateManager()->SetNewState(G4State_Idle);
}

void RunManagerMTWorker::initializeUserActions() {
  m_tls->runInterface.reset(new SimRunInterface(this, false));
  m_tls->userRunAction.reset(new RunAction(m_pRunAction, 
                       m_tls->runInterface.get(),false));
  m_tls->userRunAction->SetMaster(false);
  Connect(m_tls->userRunAction.get());

  G4EventManager * eventManager = m_tls->kernel->GetEventManager();
  eventManager->SetVerboseLevel(m_EvtMgrVerbosity);

  EventAction * userEventAction =
    new EventAction(m_pEventAction, m_tls->runInterface.get(), 
            m_tls->trackManager.get(), m_sVerbose.get());
  Connect(userEventAction);
  eventManager->SetUserAction(userEventAction);

  TrackingAction* userTrackingAction =
    new TrackingAction(userEventAction, m_pTrackingAction, m_sVerbose.get());
  Connect(userTrackingAction);
  eventManager->SetUserAction(userTrackingAction);

  SteppingAction* userSteppingAction =
    new SteppingAction(userEventAction,m_pSteppingAction,m_sVerbose.get(),m_hasWatchers); 
  Connect(userSteppingAction);
  eventManager->SetUserAction(userSteppingAction);

  eventManager->SetUserAction(new StackingAction(userTrackingAction,
                         m_pStackingAction,m_sVerbose.get()));

}

void  RunManagerMTWorker::Connect(RunAction* runAction)
{
  runAction->m_beginOfRunSignal.connect(m_tls->registry->beginOfRunSignal_);
  runAction->m_endOfRunSignal.connect(m_tls->registry->endOfRunSignal_);
}

void  RunManagerMTWorker::Connect(EventAction* eventAction)
{
  eventAction->m_beginOfEventSignal.connect(m_tls->registry->beginOfEventSignal_);
  eventAction->m_endOfEventSignal.connect(m_tls->registry->endOfEventSignal_);
}

void  RunManagerMTWorker::Connect(TrackingAction* trackingAction)
{
  trackingAction->m_beginOfTrackSignal.connect(m_tls->registry->beginOfTrackSignal_);
  trackingAction->m_endOfTrackSignal.connect(m_tls->registry->endOfTrackSignal_);
}

void  RunManagerMTWorker::Connect(SteppingAction* steppingAction)
{
  steppingAction->m_g4StepSignal.connect(m_tls->registry->g4StepSignal_);
}

SimTrackManager* RunManagerMTWorker::GetSimTrackManager() {
  initializeTLS();
  return m_tls->trackManager.get();
}
std::vector<SensitiveTkDetector*>& RunManagerMTWorker::sensTkDetectors() {
  initializeTLS();
  return m_tls->sensTkDets; 
}
std::vector<SensitiveCaloDetector*>& RunManagerMTWorker::sensCaloDetectors() {
  initializeTLS();
  return m_tls->sensCaloDets; 
}
std::vector<std::shared_ptr<SimProducer> > RunManagerMTWorker::producers() {
  initializeTLS();
  return m_tls->producers;
}

void RunManagerMTWorker::initializeRun() {
  m_tls->currentRun = new G4Run();
  G4StateManager::GetStateManager()->SetNewState(G4State_GeomClosed);
  if (m_tls->userRunAction) { m_tls->userRunAction->BeginOfRunAction(m_tls->currentRun); }
}

void RunManagerMTWorker::terminateRun() {
  if(!m_tls || m_tls->runTerminated) { return; }
  if(m_tls->userRunAction) {
    m_tls->userRunAction->EndOfRunAction(m_tls->currentRun);
    m_tls->userRunAction.reset();
  }
  m_tls->currentEvent.reset();
  m_simEvent=nullptr;

  if(m_tls->kernel) {
    m_tls->kernel->RunTermination();
  }

  m_tls->runTerminated = true;
}

std::unique_ptr<G4SimEvent>
RunManagerMTWorker::produce(const edm::Event& inpevt, const edm::EventSetup& es, 
                            RunManagerMT& runManagerMaster) {
  // The initialization and begin/end run is a bit convoluted due to
  // - Geant4 deals per-thread
  // - OscarMTProducer deals per-stream
  // and framework/TBB is free to schedule work in streams to the
  // threads as it likes.
  //
  // We have to do the per-thread initialization, and per-thread
  // per-run initialization here by ourselves. 

  if(!(m_tls && m_tls->threadInitialized)) {
    LogDebug("SimG4CoreApplication") 
      << "RunManagerMTWorker::produce(): stream " 
      << inpevt.streamID() << " thread " << getThreadIndex() << " initializing";
    initializeThread(runManagerMaster, es);
    m_tls->threadInitialized = true;
  }
  // Initialize run
  if(inpevt.id().run() != m_tls->currentRunNumber) {
    if(m_tls->currentRunNumber != 0 && !m_tls->runTerminated) {
      // If previous run in this thread was not terminated via endRun() call, terminate it now
      terminateRun();
    }
    initializeRun();
    m_tls->currentRunNumber = inpevt.id().run();
  }
  m_tls->runInterface->setRunManagerMTWorker(this); // For UserActions

  m_tls->currentEvent.reset(generateEvent(inpevt));

  auto simEvent =std::make_unique<G4SimEvent>();
  m_simEvent = simEvent.get();
  m_simEvent->hepEvent(m_generator.genEvent());
  m_simEvent->weight(m_generator.eventWeight());
  if (m_generator.genVertex() != nullptr ) {
    auto genVertex = m_generator.genVertex();
    m_simEvent->collisionPoint(
      math::XYZTLorentzVectorD(genVertex->x()/centimeter,
                   genVertex->y()/centimeter,
                   genVertex->z()/centimeter,
                   genVertex->t()/second));
  }
  if (m_tls->currentEvent->GetNumberOfPrimaryVertex()==0) {
    std::stringstream ss;
    ss << "RunManagerMTWorker::produce(): event " << inpevt.id().event()
       << " with no G4PrimaryVertices \n" ;
    throw SimG4Exception(ss.str());

  } else {
    if(!m_tls->kernel) {
      std::stringstream ss;
      ss << " RunManagerMT::produce(): "
     << " no G4WorkerRunManagerKernel yet for thread index" 
     << getThreadIndex() << ", id " << std::hex 
     << std::this_thread::get_id() << " \n";
      throw SimG4Exception(ss.str());
    }

    edm::LogVerbatim("SimG4CoreApplication")
      << " RunManagerMTWorker::produce: start Event " << inpevt.id().event() 
      << " stream id " << inpevt.streamID()
      << " thread index " << getThreadIndex()
      << " of weight " << m_simEvent->weight()
      << " with " << m_simEvent->nTracks() << " tracks and " 
      << m_simEvent->nVertices()
      << " vertices, generated by " << m_simEvent->nGenParts() << " particles ";

    m_tls->kernel->GetEventManager()->ProcessOneEvent(m_tls->currentEvent.get());

    edm::LogVerbatim("SimG4CoreApplication")
      << " RunManagerMTWorker::produce: ended Event " << inpevt.id().event(); 
  } 

  //remove memory only needed during event processing
  m_tls->currentEvent.reset();

  for(auto& sd: m_tls->sensCaloDets ) {
    sd->reset();
  }

  m_simEvent=nullptr;
  return simEvent;
}

void RunManagerMTWorker::abortEvent() {
  if(m_tls->runTerminated) { return; }
  G4Track* t = m_tls->kernel->GetEventManager()->GetTrackingManager()->GetTrack();
  t->SetTrackStatus(fStopAndKill) ;

  // CMS-specific act
  //
  TrackingAction* uta =
    static_cast<TrackingAction *>(m_tls->kernel->GetEventManager()->GetUserTrackingAction());
  uta->PostUserTrackingAction(t) ;

  m_tls->currentEvent->SetEventAborted();
  m_tls->kernel->GetEventManager()->GetStackManager()->clear();
  m_tls->kernel->GetEventManager()->GetTrackingManager()->EventAborted();
}

void RunManagerMTWorker::abortRun(bool softAbort) {
  if (!softAbort) { abortEvent(); }
  m_tls->currentRun = nullptr;
  terminateRun();
}

G4Event * RunManagerMTWorker::generateEvent(const edm::Event& inpevt) {
  m_tls->currentEvent.reset();
  m_simEvent=nullptr;

  // 64 bits event ID in CMSSW converted into Geant4 event ID
  G4int evtid = (G4int)inpevt.id().event();
  G4Event * evt = new G4Event(evtid);

  edm::Handle<edm::HepMCProduct> HepMCEvt;

  inpevt.getByToken(m_InToken, HepMCEvt);

  m_generator.setGenEvent(HepMCEvt->GetEvent());

  // required to reset the GenParticle Id for particles transported
  // along the beam pipe
  // to their original value for SimTrack creation
  resetGenParticleId( inpevt );

  if (!m_nonBeam) 
    {
      m_generator.HepMC2G4(HepMCEvt->GetEvent(),evt);
    }
  else 
    {
      m_generator.nonBeamEvent2G4(HepMCEvt->GetEvent(),evt);
    }

  return evt;
}

void RunManagerMTWorker::resetGenParticleId(const edm::Event& inpevt)
{
  edm::Handle<edm::LHCTransportLinkContainer> theLHCTlink;
  inpevt.getByToken( m_theLHCTlinkToken, theLHCTlink );
  if ( theLHCTlink.isValid() ) {
    m_tls->trackManager->setLHCTransportLink( theLHCTlink.product() );
  }
}