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Related Experiment Videos

Architectural limits on optical-highway-based parallel computing.

Gordon A Russell1, John F Snowdon

  • 1School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK. g.a.russell@hw.ac.uk

Applied Optics
|August 17, 2006
PubMed
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Optoelectronic interconnects offer high bandwidth but suffer from latency issues. This latency limits their performance advantage over electronic interconnects for small message sizes in high-performance computing.

Area of Science:

  • Computer Science
  • Electrical Engineering
  • High-Performance Computing

Background:

  • Optoelectronic interconnects are proposed for high-performance computing due to their high bandwidth.
  • Traditional electronic interconnects are widely used but have bandwidth limitations.

Purpose of the Study:

  • To analyze the impact of latency in optoelectronic interconnects for high-performance computer systems.
  • To determine the conditions under which optoelectronic interconnects offer performance benefits over electronic interconnects.

Main Methods:

  • Theoretical analysis of optoelectronic interprocessor interconnect latency.
  • Comparison of performance metrics between optoelectronic and electronic interconnects for varying message sizes.

Main Results:

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  • Optoelectronic interconnects exhibit significant latency, especially for small message sizes.
  • A lower limit on the number of processors is identified for performance enhancement.

Conclusions:

  • Latency in optoelectronic interconnects can negate bandwidth advantages for certain computational problems.
  • Electronic interconnects may remain superior for high-performance computing tasks involving small messages.