Occamy: A Preemptive Buffer Management for On-chip Shared-memory Switches
Danfeng Shan, Yunguang Li, Jinchao Ma, Zhenxing Zhang, Zeyu Liang, Xinyu Wen, Hao Li, Wanchun Jiang, Nan Li, Fengyuan Ren · 2025
Today's high-speed switches employ an on-chip shared packet buffer. The buffer is becoming increasingly insufficient as it cannot scale with the growing switching capacity. Nonetheless, the buffer needs to face highly intense bursts and meet stringent performance requirements for datacenter applications. This imposes rigorous demand on the Buffer Management (BM) scheme, which dynamically allocates the buffer across queues. However, the de facto BM scheme, designed over two decades ago, is ill-suited to meet the requirements of today's network.