research-article

More is Less, Less is More: Molecular-Scale Photonic NoC Power Topologies

Authors:

Alvin R. LebeckAuthors Info & Claims

ACM SIGARCH Computer Architecture News, Volume 43, Issue 1

Pages 283 - 296

https://doi.org/10.1145/2786763.2694377

Published: 14 March 2015 Publication History

Abstract

Molecular-scale Network-on-Chip (mNoC) crossbars use quantum dot LEDs as an on-chip light source, and chromophores to provide optical signal filtering for receivers. An mNoC reduces power consumption or enables scaling to larger crossbars for a reduced energy budget compared to current nanophotonic NoC crossbars. Since communication latency is reduced by using a high-radix crossbar, minimizing power consumption becomes a primary design target. Conventional Single Writer Multiple Reader (SWMR) photonic crossbar designs broadcast all packets, and incur the commensurate required power, even if only two nodes are communicating.

This paper introduces power topologies, enabled by unique capabilities of mNoC technology, to reduce overall interconnect power consumption. A power topology corresponds to the logical connectivity provided by a given power mode. Broadcast is one power mode and it consumes the maximum power. Additional power modes consume less power but allow a source to communicate with only a statically defined, potentially non-contiguous, subset of nodes. Overall interconnect power is reduced if the more frequently communicating nodes use modes that consume less power, while less frequently communicating nodes use modes that consume more power. We also investigate thread mapping techniques to fully exploit power topologies. We explore various mNoC power topologies with one, two and four power modes for a radix-256 SWMR mNoC crossbar. Our results show that the combination of power topologies and intelligent thread mapping can reduce total mNoC power by up to 51% on average for a set of 12 SPLASH benchmarks. Furthermore performance is 10% better than conventional resonator-based photonic NoCs and energy is reduced by 72%.

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Cited By

Mirhosseini ASadrosadati MAghamohammadi FModarressi MSarbazi-Azad H(2019)BARANACM Transactions on Parallel Computing10.1145/32940495:3(1-29)Online publication date: 22-Jan-2019
https://dl.acm.org/doi/10.1145/3294049
Mirhosseini ASadrosadati MAghamohammadi FModarressi MSarbazi-Azad H(2019)BARANACM Transactions on Parallel Computing10.1145/32940495:3(1-29)Online publication date: 22-Jan-2019
https://dl.acm.org/doi/10.1145/3294049
Wang XGu HYang YWang K(2019)A Group-Based Laser Power Supply Scheme for Photonic Network on ChipIEEE Photonics Journal10.1109/JPHOT.2019.291367611:3(1-14)Online publication date: Jun-2019
https://doi.org/10.1109/JPHOT.2019.2913676
Show More Cited By

Index Terms

More is Less, Less is More: Molecular-Scale Photonic NoC Power Topologies
1. Computer systems organization
  1. Architectures
    1. Parallel architectures
      1. Interconnection architectures
      2. Multiple instruction, multiple data

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Information & Contributors

Information

Published In

cover image ACM SIGARCH Computer Architecture News

ACM SIGARCH Computer Architecture News Volume 43, Issue 1

ASPLOS'15

March 2015

676 pages

ISSN:0163-5964

DOI:10.1145/2786763

Editor:
Doug DeGroot
acm dot org

Issue’s Table of Contents

ASPLOS '15: Proceedings of the Twentieth International Conference on Architectural Support for Programming Languages and Operating Systems
March 2015
720 pages
ISBN:9781450328357
DOI:10.1145/2694344
General Chairs:
Ozcan Ozturk
Bilkent University, Turkey
,
Kemal Ebcioglu
Global Supercomputing, USA
,
Program Chair:
Sandhya Dwarkadas
University of Rochester, USA

Copyright © 2015 ACM.

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Published: 14 March 2015

Published in SIGARCH Volume 43, Issue 1

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Cited By

Mirhosseini ASadrosadati MAghamohammadi FModarressi MSarbazi-Azad H(2019)BARANACM Transactions on Parallel Computing10.1145/32940495:3(1-29)Online publication date: 22-Jan-2019
https://dl.acm.org/doi/10.1145/3294049
Mirhosseini ASadrosadati MAghamohammadi FModarressi MSarbazi-Azad H(2019)BARANACM Transactions on Parallel Computing10.1145/32940495:3(1-29)Online publication date: 22-Jan-2019
https://dl.acm.org/doi/10.1145/3294049
Wang XGu HYang YWang K(2019)A Group-Based Laser Power Supply Scheme for Photonic Network on ChipIEEE Photonics Journal10.1109/JPHOT.2019.291367611:3(1-14)Online publication date: Jun-2019
https://doi.org/10.1109/JPHOT.2019.2913676
Zhang XBashizade RLaBoda CDwyer CLebeck A(2018)Architecting a stochastic computing unit with molecular optical devicesProceedings of the 45th Annual International Symposium on Computer Architecture10.1109/ISCA.2018.00034(301-314)Online publication date: 2-Jun-2018
https://dl.acm.org/doi/10.1109/ISCA.2018.00034

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