First experience of vectorizing electromagnetic physics models for detector simulation

Conference · Wed Dec 23 00:00:00 EST 2015 · J.Phys.Conf.Ser.

DOI:https://doi.org/10.1088/1742-6596/664/9/092013· OSTI ID:1250786

Amadio, G. ^[1]; Apostolakis, J. ^[2]; Bandieramonte, M. ^[3]; Bianchini, C. ^[4]; Bitzes, G. ^[2]; Brun, R. ^[2]; Canal, P. ^[5]; Carminati, F. ^[2]; Licht, J.de Fine ^[6]; Duhem, L. ^[7]; Elvira, D. ^[5]; Gheata, A. ^[2]; Jun, S. Y. ^[5]; Lima, G. ^[5]; Novak, M. ^[2]; Presbyterian, M. ^[8]; Shadura, O. ^[2]; Seghal, R. ^[8]; Wenzel, S. ^[2]

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1. Sao Paulo State U.
2. CERN
3. Catania Astrophys. Observ.
4. Mackenzie Presbiteriana U.
5. Fermilab
6. U. Copenhagen (main)
7. Intel, Santa Clara
8. Bhabha Atomic Res. Ctr.

The recent emergence of hardware architectures characterized by many-core or accelerated processors has opened new opportunities for concurrent programming models taking advantage of both SIMD and SIMT architectures. The GeantV vector prototype for detector simulations has been designed to exploit both the vector capability of mainstream CPUs and multi-threading capabilities of coprocessors including NVidia GPUs and Intel Xeon Phi. The characteristics of these architectures are very different in terms of the vectorization depth, parallelization needed to achieve optimal performance or memory access latency and speed. An additional challenge is to avoid the code duplication often inherent to supporting heterogeneous platforms. In this paper we present the first experience of vectorizing electromagnetic physics models developed for the GeantV project.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1250786
• Report Number(s): FERMILAB-CONF-15-597-CD; 1414089
• Journal Information: J.Phys.Conf.Ser., Vol. 664, Issue 9; Conference: 21st International Conference on Computing in High Energy and Nuclear Physics, Okinawa, Japan, 04/13-04/17/2015
• Country of Publication: United States
• Language: English