Benchmark Simulation and Experimental Testbed Studies of AWGR-Based, Multi-Layer Photonic Interconnects for Low- Latency, Energy-Efficient Computing Architectures
Authors: Paolo Grani (University of California, Davis), Roberto Proietti (University of California, Davis), Zheng Cao (University of California, Davis), S. J. Ben Yoo (University of California, Davis)
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Abstract: In this work, we show future research directions about optical computing systems based on Arrayed Waveguide Grating Routers. We analyze the optical integration at different layers of large-scale architectures. At board-level, we aim to demonstrate significant execution time improvements and energy efficiency of optically interconnected systems running real benchmark
applications on a cycle-accurate simulator. We simulate tiled optical Multi-Socket Blades (MSBs), and we implement multiple optimization techniques to achieve different tradeoffs between performance and energy consumption and to prove the importance of chip-level optical integration. In the large-scale we show, through a network simulator, significant latency and throughput improvement running uniform distributed traffic for both intra- and inter-cluster optical-based architecture. A software framework, based on trace-driven approach, will be developed for benchmarking large-scale solutions. We show an experimental hardware setup for next future testbeds to demonstrate the efficiency, in terms of throughput and energy consumption, of the proposed optical architectures.
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