| Issue |
EPJ Web Conf.
Volume 214, 2019
23rd International Conference on Computing in High Energy and Nuclear Physics (CHEP 2018)
|
|
|---|---|---|
| Article Number | 02031 | |
| Number of page(s) | 11 | |
| Section | T2 - Offline computing | |
| DOI | https://doi.org/10.1051/epjconf/201921402031 | |
| Published online | 17 September 2019 | |
https://doi.org/10.1051/epjconf/201921402031
Electromagnetic physics vectorization in the GeantV transport framework
1
CERN,
Meyrin 1211,
Switzerland
2
University of Pittsburgh,
PA 15260,
USA
3
Bhabha Atomic Research Centre,
Mumbai 400085
IN
4
Fermi National Accelerator Lab,
IL 60510,
US
5
Institute of Space Science,
Magurele 077125,
RO
6
Tomsk State University,
Tomsk 634050,
Russia
7
University of Nebraska,
NE 68588,
US
8
Centro de Investigación en Computación,
07738 Gustavo A. Madero,,
Mexico
* e-mail: marilena.bandieramonte@cern.ch
Published online: 17 September 2019
The development of the GeantV Electromagnetic (EM) physics package has evolved following two necessary paths towards code modernization. A first phase required the revision of the main electromagnetic physics models and their implementation. The main objectives were to improve their accuracy, extend them to the new high-energy frontier posed by the Future Circular Collider (FCC) programme and allow a better adaptation to a multi-particle flow. Most of the EM physics models in GeantV have been reviewed from theoretical perspective and rewritten with vector-friendly implementations, being now available in scalar mode in the alpha release. The second phase consists of a thorough investigation on the possibility to vectorise the most CPU-intensive physics code parts, such as final state sampling. We have shown the feasibility of implementing electromagnetic physics models that take advantage of SIMD/SIMT architectures, thus obtaining gains in performance. After this phase, the time has come for the GeantV project to take a step forward towards the final proof of concept. This takes shape through the testing of the full simulation chain (transport + physics + geometry) running in vectorized mode. In this paper we will present the first benchmark results obtained after vectorizing a full set of electromagnetic physics models.
© The Authors, published by EDP Sciences, 2019
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