TY  - CONF
AU  - Bocci, Andrea
AU  - Das, Abhishek
AU  - Hatakeyama, Kenichi
AU  - Pantaleo, Felice
AU  - Lorkowski, Florian
AU  - Redjeb, Wahid
AU  - Samudio, Jonathan
AU  - Saunders, Mark
TI  - Heterogeneous reconstruction of hadronic particle flow clusters with the Alpaka Portability Library
JO  - The European physical journal / Web of Conferences
VL  - 337
SN  - 2100-014X
CY  - Les Ulis
PB  - EDP Sciences
M1  - PUBDB-2026-00386
SP  - 01171 
PY  - 2025
AB  - In response to increasing data challenges, CMS has adopted the use of GPU offloading at the High-Level Trigger (HLT). However, GPU code is often hardware specific, and increases the maintenance burden on software development. The Alpaka (Abstraction Library for Parallel Kernel Acceleration) portability library offers a solution to this issue, and has been implemented into the CMS software (CMSSW) for use online at HLT. A portion of the final-state particle candidate reconstruction algorithm, Particle Flow, represented a target for increased performance through parallel operation. We discuss the port of hadronic Particle Flow clustering to Alpaka, and the validation of physics and performance at HLT for 2024 data taking.
T2  - 27th International Conference on Computing in High Energy and Nuclear Physics
CY  - 21 Oct 2024 - 25 Oct 2024, Krakow (Poland)
Y2  - 21 Oct 2024 - 25 Oct 2024
M2  - Krakow, Poland
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
DO  - DOI:10.1051/epjconf/202533701171
UR  - https://bib-pubdb1.desy.de/record/644527
ER  -