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

The LHCb collaboration; Silvia Borghi; John Cobbledick; Lucia Grillo; Anna Lupato; Biljana Mitreska; Nicola Skidmore

doi:10.1007/s41781-021-00070-2

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

The LHCb collaboration
, Silvia Borghi
, John Cobbledick
, Lucia Grillo
, Anna Lupato
, Biljana Mitreska
, Nicola Skidmore

Research output: Contribution to journal › Article › peer-review

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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.

Original language	English
Journal	Computing and Software for Big Science
Volume	6
Issue number	1
DOIs	https://doi.org/10.1007/s41781-021-00070-2
Publication status	Published - 22 Dec 2021

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2105.04031v2Submitted manuscript, 4.99 MBLicence: CC BY

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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. ",

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AU - The LHCb collaboration

AU - Borghi, Silvia

AU - Cobbledick, John

AU - Fitzpatrick, Conor

AU - Grillo, Lucia

AU - Lupato, Anna

AU - Mitreska, Biljana

AU - Skidmore, Nicola

AU - al, et

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AB - 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.

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JO - Computing and Software for Big Science

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

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