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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and V. Chan
  • Vol. 3, Iss. 8 — Aug. 1, 2011
  • pp: A59–A72

Buffering and Flow Control in Optical Switches for High Performance Computing

Xiaohui Ye, Roberto Proietti, Yawei Yin, S. J. B. Yoo, and Venkatesh Akella  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 3, Issue 8, pp. A59-A72 (2011)
http://dx.doi.org/10.1364/JOCN.3.000A59


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Abstract

We investigate the advantages and disadvantages of different loopback buffer architectures for optical switches and compare their performance via simulation. The simulation results show that, without the use of virtual output queuing, the head-of-line blocking can be alleviated by wavelength parallelism when each separate queue in a loopback buffer has multiple transmitters. Furthermore, the proposed two-level flow control can eliminate packet drop at the switch, resolve rate mismatching due to output queuing at switch outputs, and ensure that congestion occurring at the hotspot port will not affect the performance of non-congested ports.

© 2011 OSA

OCIS Codes
(200.4650) Optics in computing : Optical interconnects
(200.6715) Optics in computing : Switching
(060.6719) Fiber optics and optical communications : Switching, packet

ToC Category:
Optics in the Data Center

History
Original Manuscript: April 29, 2011
Revised Manuscript: June 29, 2011
Manuscript Accepted: June 30, 2011
Published: July 25, 2011

Citation
Xiaohui Ye, Roberto Proietti, Yawei Yin, S. J. B. Yoo, and Venkatesh Akella, "Buffering and Flow Control in Optical Switches for High Performance Computing," J. Opt. Commun. Netw. 3, A59-A72 (2011)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-3-8-A59

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