2024/04/22 by Haonan Jia, Jia, Haonan, Meng Wang +9
Computer Science · Engineering · #Advanced MIMO Systems Optimization #FOS: Computer and information sciences #Interconnection Networks and Systems #Networking and Internet Architecture (cs.NI) #Satellite Communication Systems
paper · pdf · doi:10.48550/arxiv.2404.13991
openalex publication_date 2024/04/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Last Level Cache (LLC) is a precious and critical resource that impacts the performance of applications running on top of CPUs. In this paper, we reveal the significant impact of LLC on the performance of the 5G user plane function (UPF) when running a cloudified 5G core on general-purposed servers. With extensive measurements showing that the throughput can degrade by over 50% when the precious LLC resource of UPF is not properly allocated, we identify three categories of performance degradation caused by incorrect LLC usage: DMA leakage problem, hot/cold mbuf problem and cache contention. To address these problems, we introduce the design and implementation of 5GC2ache that monitors the LLC status as well as the throughput performance and dynamically adjusts key parameters of the LLC resource allocation. Our experiments show that 5GC2ache enables a commercial 5G core to increase its throughput to 76.41Gbps, 39.41% higher than the original performance and 29.55% higher than the state-of-the-art.