Allen: A high level trigger on GPUs for LHCb
Abstract
We describe a fully GPU-based implementation of the first level trigger for the upgrade of the LHCb detector, due to start data taking in 2021. We demonstrate that our implementation, named Allen, can process the 40 Tbit/s data rate of the upgraded LHCb detector and perform a wide variety of pattern recognition tasks. These include finding the trajectories of charged particles, finding proton-proton collision points, identifying particles as hadrons or muons, and finding the displaced decay vertices of long-lived particles. We further demonstrate that Allen can be implemented in around 500 scientific or consumer GPU cards, that it is not I/O bound, and can be operated at the full LHC collision rate of 30 MHz. Allen is the first complete high-throughput GPU trigger proposed for a HEP experiment.
Keywords
Cite
@article{arxiv.1912.09161,
title = {Allen: A high level trigger on GPUs for LHCb},
author = {R. Aaij and J. Albrecht and M. Belous and P. Billoir and T. Boettcher and A. Brea Rodríguez and D. vom Bruch and D. H. Cámpora Pérez and A. Casais Vidal and D. C. Craik and P. Fernandez Declara and L. Funke and V. V. Gligorov and B. Jashal and N. Kazeev and D. Martínez Santos and F. Pisani and D. Pliushchenko and S. Popov and R. Quagliani and M. Rangel and F. Reiss and C. Sánchez Mayordomo and R. Schwemmer and M. Sokoloff and H. Stevens and A. Ustyuzhanin and X. Vilasís Cardona and M. Williams},
journal= {arXiv preprint arXiv:1912.09161},
year = {2020}
}
Comments
12 pages, 12 figures, 2 tables