Journal
Publisher
IEEE
DOI: 10.1109/SC41405.2020.00030
Keywords
Computer network; Reconfigurable architectures; Optical interconnections; Photonic integrated circuits; Wavelength routing
Categories
Funding
- ARO award [W91 1NF1910470]
- DOD award [H98230-19-C-0209]
- NSF ECCS award [1611560]
- DoE UAI consortium award [DE-SC0019582, DE-SC0019526, DE-SC001969]
- U.S. Department of Energy (DOE) [DE-SC0019582, DE-SC0019526] Funding Source: U.S. Department of Energy (DOE)
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While the Fat-Tree network topology represents the dominant state-of-art solution for large-scale HPC networks, its scalability in terms of power, latency, complexity, and cost is significantly challenged by the ever-increasing communication bandwidth among tens of thousands of heterogeneous computing nodes. We propose 3D-Hyper-FleX-LION, a flat hybrid electronic-photonic interconnect network that leverages the multi-channel nature of modern multi-terabit switch ASICs (with 100 Gb/s granularity) and a reconfigurable all-to-all photonic fabric called Flex-LIONS. Compared to a Fat-Tree network interconnecting the same number of nodes and with the same oversubscription ratio, the proposed 3D-Hyper-FleX-LION offers a 20% smaller diameter, 3x lower power consumption, 10x fewer cable connections, and 4x reduction in the number of transceivers. When bandwidth reconfiguration capabilities of Flex-LIONS are exploited for non-uniform traffic workloads, simulation results indicate that 3D-Hyper-FleX-LION can achieve up to 4x improvement in energy efficiency for synthetic traffic workloads with high locality compared to Fat-Tree.
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