LArSoft  v09_90_00
Liquid Argon Software toolkit - https://larsoft.org/
exampleB2b.cc File Reference

Main program of the B2b example. More...

#include "B2bDetectorConstruction.hh"
#include "B2ActionInitialization.hh"
#include "tbbUserWorkerInitialization.hh"
#include "SimpleTbbMasterRunManager.hh"
#include "G4Threading.hh"
#include "G4UImanager.hh"
#include "FTFP_BERT.hh"
#include "G4StepLimiterPhysics.hh"
#include "Randomize.hh"
#include "G4VisExecutive.hh"
#include "G4UIExecutive.hh"
#include <tbb/task_scheduler_init.h>
#include <tbb/task.h>

Go to the source code of this file.

Functions

G4ThreadFunReturnType startWork (G4ThreadFunArgType arg)
 
int main (int argc, char **argv)
 

Detailed Description

Main program of the B2b example.

Definition in file exampleB2b.cc.

Function Documentation

int main ( int  argc,
char **  argv 
)

Definition at line 75 of file exampleB2b.cc.

References startWork().

76 {
77  // Instantiate G4UIExecutive if there are no arguments (interactive mode)
78  G4UIExecutive* ui = 0;
79  if ( argc == 1 ) {
80  ui = new G4UIExecutive(argc, argv);
81  }
82 
83  // Choose the Random engine
84 
85  G4Random::setTheEngine(new CLHEP::RanecuEngine);
86 
87  unsigned int numCoresAvailable= G4Threading::G4GetNumberOfCores();
88  unsigned int numberOfCoresToUse= (numCoresAvailable > 1 ) ? 2 : 1 ;
89  //=== TBB engine initialization
90  tbb::task_scheduler_init init( numberOfCoresToUse );
91  tbb::task_list tasks;
92 
93  SimpleTbbMasterRunManager* runManager = new SimpleTbbMasterRunManager;
94 
95  //Set TBB specific data to run-manager, 1 event per tbb::task (e.g. Nevents == N tasks)
96  //Note that a /run/beamOn command will just create tasks and add them to tasks
97  runManager->SetNumberEventsPerTask(1); //Not needed since 1 is however default
98  runManager->SetTaskList(&tasks);
99  //Set user-initialization that specify threading model, in this case TBB.
100  //This overwrites default that uses pthreads
101  runManager->SetUserInitialization(new tbbUserWorkerInitialization );
102 
103  //==== Geant4 specific stuff, from now up to END-G4 comment is copy from MT example
104  // Set mandatory initialization classes
105 
106  runManager->SetUserInitialization(new B2bDetectorConstruction());
107 
108  G4VModularPhysicsList* physicsList = new FTFP_BERT;
109  physicsList->RegisterPhysics(new G4StepLimiterPhysics());
110  runManager->SetUserInitialization(physicsList);
111 
112  // Set user action classes
113 
114  runManager->SetUserInitialization(new B2ActionInitialization());
115 
116  // Initialize G4 kernel
117 
118  runManager->Initialize();
119 
120  // Get the pointer to the User Interface manager
121  G4UImanager* UImanager = G4UImanager::GetUIpointer();
122 
123  if (!ui) // batch mode
124  {
125  G4String command = "/control/execute ";
126  G4String fileName = argv[1];
127  UImanager->ApplyCommand(command+fileName);
128  }
129  else
130  { // interactive mode : define UI session
131 #if 1
132  G4int nEvents= 50;
133  runManager->BeamOn(nEvents);
134 #else
135  UImanager->ApplyCommand("/control/execute init.mac");
136  if (ui->IsGUI())
137  UImanager->ApplyCommand("/control/execute gui.mac");
138  ui->SessionStart();
139  delete ui;
140 #endif
141  }
142  //END-G4
143  G4Thread* aThread = new G4Thread;
144  G4THREADCREATE(aThread, startWork, static_cast<G4ThreadFunArgType>(&tasks));
145 
146  //Wait for work to be finised
147  if(aThread)
148  aThread->join();
149 
150  delete runManager;
151 
152  return 0;
153 }
G4ThreadFunReturnType startWork(G4ThreadFunArgType arg)
Definition: exampleB2b.cc:59
G4ThreadFunReturnType startWork ( G4ThreadFunArgType  arg)

Definition at line 59 of file exampleB2b.cc.

References e.

Referenced by main().

60 {
61  tbb::task_list* tasks = static_cast<tbb::task_list*>(arg);
62  //We assume at least one /run/beamOn was executed, thus the tasklist is now filled,
63  //lets start TBB
64  try {
65  std::cout<<"Now calling 'tbb::task::spawn_work_and_wait' "<<std::endl;
66  tbb::task::spawn_root_and_wait( *tasks );
67  } catch(std::exception& e) {
68  std::cerr<<"Error occurred. Error info is:\""<<e.what()<<"\""<<std::endl;
69  }
70  return static_cast<G4ThreadFunReturnType>(0);
71 }
Float_t e
Definition: plot.C:35
cet::coded_exception< error, detail::translate > exception
Definition: exception.h:33