2020 Session 7

Multithreading

Objectives

• What you will learn

Online Notes

• https://docs.google.com/document/d/1_BWfSfNVEgKaYUqoolGEz0Tq_f1iwE4asfzsGluJZlw/edit?usp=sharing

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 )

• More on Visualization ( slides , video )
  • Visualization commands, Extending GUI

Exercise

• Migrate Geant4 application to MT
• Get experience with Geant4 multi-threading
• Inspect Root output, using TChain
• Get experience with a race condition
• Extend gui.mac with your own buttons/menus