High speed data scouting: evaluating RDMA and 400G Ethernet for the CMS Level-1 Trigger Scouting System
Abstract
Abstract The CMS Level-1 Trigger scouting system, planned as part of the HL-LHC upgrade, aims to collect objects reconstructed by the L1 trigger at the LHC bunch-crossing rate of 40 MHz to perform online physics analyses bypassing the standard trigger accept budget. As part of this effort, the use of RDMA over Converged Ethernet is being evaluated to transfer data from the scouting FPGA boards to the processing servers. This work presents the first implementation of RoCEv2 on an AMD Versal adaptive SoC evaluation board operating at 400 Gbps. The system is capable of sustaining a throughput of 392 Gbps, with a negligible CPU overhead on the receiver server.
Fields of Study & Subjects
Embedded Systems and FPGA Design
Particle Detector Development and Performance
Parallel Computing and Optimization Techniques
Publication details
- Journal / source
- Journal of Instrumentation
- Volume
- 21
- Issue
- 01
- Pages
- C01046–C01046
- Publication date
- 1 January 2026
- Language
- EN