Preliminary tracking studies involving GPU accelerators for the ATLAS Event Filter at the HL-LHC

The Event Filter (EF) Tracking system allows real-time, online tracking for the ATLAS trigger in the upcoming HL-LHC era. Although still under development, this note highlights the impressive performance achieved so far by integrating GPU accelerators into the tracking workflow. Early results demonstrate tracking capabilities approaching those of full offline reconstruction with the new full-silicon tracker (ITk), showcasing the transformative potential of GPU-based processing. Preliminary system performance metrics are also presented, pointing toward a future where high-throughput, low-latency tracking becomes a practical reality.Scientific contact person Genest, Marie-Helene, (genest@lpsc.in2p3.fr)