Session 7

Multithreading, Scoring II, Geometry II (1)

Objectives

• Session focusing on Multi-Threading (MT)
  • Explain what is MT in general
  • Expose the benefit and issues specific to MT
  • Explain the MT scheme adopted by Geant4
  • Explain how to make a Geant4 MT compliant
• Expose how to store and retrieve a geometry from file

Presentations

• Multithreading 1 ( slides )

  • What is a thread, Why multi-threading, Multi-threading in Geant4, Multi-threading Geant4 application

• Multithreading 2, 3

  • What is thread-safety, Geant4 MT utilities (slides)
  • Event data reduction, Migration of a sequential application to MT, Results with Geant 10.2 (reproducibilty, scalability, memory reduction), integration with external frameworks (slides)

• Geometry 2: Persistency ( slides)
  • Geometry persistency (ASCII text models, GDML, Importing geometries from CAD)

Hands-On

• Migrate Geant4 application to MT
• Get experience with Geant4 multi-threading, including a data race condition
• Export/import geometry in GDML