100 Gbit/s UDP Data Acquisition on Linux Using AF_XDP: The TRISTAN Detector

A growing number of detectors produce data rates of more than 100 Gbit/s, which often necessitate softwaredefined data processing to operate. Because of its simplicity, the User Datagram protocol (UDP) offers a straightforward method for integrating such detectors with online computing resources that host the data processing software. Nevertheless, conventional technologies – such as POSIX sockets – are either ineffective or difficult to apply on detector boards based on Field Programmable Gateway Arrays (FPGAs). The new Linux AF_XDP sockets are a novel method that uses zero-copy methods to target high data speeds. In this paper, we present ”DQDK” a novel data acquisition framework based on AF_XDP and UDP for readout systems with more than 100 Gbit/s. We evaluate our framework for the TRItium Sterile Anti-Neutrino (TRISTAN) detector whose rates are expected to reach 200 Gbit/s. We describe our experience developing a TRISTAN detector readout system using AF_XDP