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DTSTART:19700308T020000
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DTSTAMP:20220812T074335Z
LOCATION:Osaka Room
DTSTART;TZID=Europe/Stockholm:20220629T113000
DTEND;TZID=Europe/Stockholm:20220629T120000
UID:submissions.pasc-conference.org_PASC22_sess167_msa177@linklings.com
SUMMARY:A Heterogeneous Trigger System for Upgrade LHCb
DESCRIPTION:Minisymposium\n\nA Heterogeneous Trigger System for Upgrade LH
 Cb\n\nGligorov\n\nIn 2022 the upgraded LHCb experiment will use a triggerl
 ess readout system collecting data at an event rate of 30 MHz and a data r
 ate of 4 Terabytes/second. A software-only High Level Trigger will enable 
 unprecedented flexibility for trigger selections. During the first stage (
 HLT1), track reconstruction and vertex fitting for charged particles enabl
 e a broad and efficient selection process to reduce the event rate to 1 MH
 z. Tracking and vertexing at 30 MHz represents a significant computing cha
 llenge, and LHCb utilizes the inherent parallelism of the triggering proce
 ss to meet throughput requirements with GPUs. We will describe how LHCb's 
 first-level GPU trigger addresses both the performance and code portabilit
 y challenges associated with heterogeneous computing at this scale.\n\nDom
 ain: Computer Science and Applied Mathematics, Physics
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