Opportunistic circuit-switching for energy efficient on-chip networks

Yuan He, Masaaki Kondo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Modern on-chip networks (NoCs) rely on virtual channel (VC) flow control to allow effective utilization of link bandwidth at the cost of more power and longer per-hop latency. Despite many existing optimization techniques for NoCs under VC flow control, we take a further step on questioning its necessity. Our finding is, when the network is not busy, circuit-switching (CS) may already satisfy the performance requirements with much smaller power consumption and shorter per-hop latency. In this paper, we propose to opportunistically enable CS in NoCs under VC flow control. This allows us to effectively reduce the power consumption of NoCs through having less buffering and longer sleep intervals for power gating while retaining CS-like per-hop latency. Our evaluations reveal that this proposal leads to a reduction of network power by up to 70% while cutting the system energy footprint by up to 35%.

Original languageEnglish
Title of host publication2016 IFIP/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509035618
DOIs
Publication statusPublished - 2016 Nov 22
Externally publishedYes
Event24th Annual IFIP/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2016 - Tallinn, Estonia
Duration: 2016 Sep 262016 Sep 28

Publication series

Name2016 IFIP/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2016

Conference

Conference24th Annual IFIP/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2016
Country/TerritoryEstonia
CityTallinn
Period16/9/2616/9/28

Keywords

  • circuit-switching
  • energy efficiency
  • flow control
  • network-on-chip
  • virtual channel

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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