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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 34,
  • Issue 12,
  • pp. 2905-2919
  • (2016)

An Energy-Efficient Optical Interconnect Architecture for Bandwidth-Balanced Systems

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Abstract

Systems comprised of interconnected computing nodes present a number of design challenges. In this paper, we present and, then, analyze a design for a power-efficient, bandwidth-balanced system to meet a performance goal of 1 PFlops. We show that the on-node bandwidth required to support internode communications grows as the data-locality of an application decreases. We present an internode network that reduces this on-node bandwidth requirement to meet the limitations of the system building block (the macrochip) and introduce a new silicon photonics-based switch called the macroswitch. Our analysis demonstrates that a bandwidth-balanced system based on the macroswitch and photonic interconnects can achieve the stated goals with significantly lower power than an evolutionary system based on conventional multilevel switches.

© 2016 IEEE

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