Workshop: Low-Cost High-Radix Photonic Switch for Rack-Scale Computing Systems
Abstract: The demand for more computational power by scientific computing, big data processing, and machine learning is pushing the development of HPC (high-performance computing) systems. As the basic HPC building blocks, modularized server racks with a large number of multicore nodes are facing performance and energy efficiency challenges. This talk introduces RSON, an optical network for rack-scale computing systems. RSON connects processor cores, caches, local memories, and remote memories through a novel inter/intra-chip silicon photonic network architecture. We develop a low-latency scalable channel partition and low-power dynamic path priority control scheme for RSON. APEX benchmarks show that rack-scale computing systems based on RSON can achieve about one order of magnitude higher energy efficiency comparing to the state-of-the-art systems.