Vertical link on/off control methods for wireless 3-d nocs

  • Authors:
  • Hao Zhang;Hiroki Matsutani;Yasuhiro Take;Tadahiro Kuroda;Hideharu Amano

  • Affiliations:
  • Keio University, Japan;Keio University, Japan;Keio University, Japan;Keio University, Japan;Keio University, Japan

  • Venue:
  • ARCS'12 Proceedings of the 25th international conference on Architecture of Computing Systems
  • Year:
  • 2012

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Abstract

Low-power techniques are proposed for the wireless three-dimensional Network-on-Chips (wireless 3-D NoCs), in which routers on the same chip are connected with metal wires while those on the different chips are connected wirelessly using the inductive-coupling. For saving power consumption of the vertical link, the clock and power supplies to the transmitter are stopped when their utilizations are between a specified range. Meanwhile, the whole wireless vertical link will be shut down when the utilization is lower than the threshold. In order to keep performance, on-demand activation is used in this paper. As long as flit comes, the dormant data transmitter or the whole vertical link will be activated immediately without any judgement. Full-system many-core simulations using power parameters derived from a real chip implementation show that the proposed low-power techniques reduce the power consumption by 23.4%-29.3%, while the performance overhead is less than 2.4%.