Performance Evaluation of Multithreaded Geant4 Simulations Using an Intel Xeon Phi Cluster

Figure 2

Comparison of energy depositions for monoenergetic electrons with initial energy of 4 MeV using TestEm12 Geant4 example calculated using a single Xeon CPU (black line), the multithreaded TestEm12 Geant4 example calculated using 40 Xeon threads (grey dashed line), using 240 Phi threads (grey circles), and using 240 threads on a Phi accelerator with an optimized compilation process (black circles). A perfect agreement is noticed between the example of reference on a single CPU and the optimized compilation process on Phi accelerator.