A Comparison of CPU and GPU Implementations for the LHCb Experiment Run 3 Trigger

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Aaij, R.; Adinolfi, M.; Aiola, S.; Akar, S.; Albrecht, J.; ... Show more
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Abstract
Abstract The Large Hadron Collider beauty (LHCb) experiment at CERN is undergoing an upgrade in preparation for the Run 3 data collection period at the Large Hadron Collider (LHC). As part of this upgrade, the trigger is moving to a full software implementation operating at the LHC bunch crossing rate. We present an evaluation of a CPU-based and a GPU-based implementation of the first stage of the high-level trigger. After a detailed comparison, both options are found to be viable. This document summarizes the performance and implementation details of these options, the outcome of which has led to the choice of the GPU-based implementation as the baseline.
Date issued
2021-12-22
URI
https://hdl.handle.net/1721.1/138852
Department
Massachusetts Institute of Technology. Department of Physics
Publisher
Springer International Publishing
Citation
Computing and Software for Big Science. 2021 Dec 22;6(1):1
Version: Final published version
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