Apr 20 – 30, 2020
Virtual/Digital only workshop
Europe/Paris timezone

Allen: A high level trigger on GPUs for LHCb

Apr 20, 2020, 3:30 PM
Virtual/Digital only workshop

Virtual/Digital only workshop


Thomas Julian Boettcher (Massachusetts Inst. of Technology (US))


The upgraded LHCb detector will begin taking data in 2021 with a triggerless readout system. As a result the full 30 MHz inelastic collision rate will be processed using a software-only High Level Trigger (HLT). This will allow for dramatic improvements in LHCb's ability to study beauty and charm hadron decays, but also presents an extraordinary technical challenge and has prompted the study of alternative hardware technologies. In this talk I will discuss the Allen project, a framework for implementing LHCb's first stage HLT (HLT1) on GPUs. I will focus on the development and performance of the full HLT1 reconstruction sequence executed on GPUs, including reconstruction algorithms developed and optimized specifically for many-core architectures.

Consider for young scientist forum (Student or postdoc speaker) Yes

Primary author

Thomas Julian Boettcher (Massachusetts Inst. of Technology (US))

Presentation materials

Peer reviewing