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Publication

Novel features and GPU performance analysis for EM particle transport in the Celeritas code

Publication Type
Conference Paper
Journal Name
EPJ Web of Conferences
Publication Date
Page Number
03030
Volume
251
Issue
1
Conference Name
25th International Conference on Computing in High-Energy and Nuclear Physics
Conference Location
Oak Ridge, Tennessee, United States of America
Conference Sponsor
CERN
Conference Date

Celeritas is a new computational transport code designed for high-performance simulation of high-energy physics detectors. This work describes some of its current capabilities and the design choices that enable the rapid development of efficient on-device physics. The abstractions that underpin the code design facilitate low-level performance tweaks that require no changes to the higher-level physics code. We evaluate a set of independent changes that together yield an almost 40% speedup over the original GPU code for a net performance increase of 220× for a single GPU over a single CPU running 8.4M tracks on a small demonstration physics app.