An Optimal Time-Power Tradeoff for Sorting on a Mesh-Connected Computer with On-Chip Optics

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Provided by: University of Miami School of Business Administration
Topic: Hardware
Format: PDF
Energy consumption has become a critical factor constraining the design of massively parallel computers, necessitating the development of new models and energy-efficient algorithms. The primary component of on-chip energy consumption is data movement, and the mesh computer is a natural model of this, explicitly taking distance into account. Unfortunately the dark silicon problem increasingly constrains the number of bits which can be moved simultaneously. For sorting, standard mesh algorithms minimize time and total data movement, and hence constraining the mesh to use only half its processors at any instant must double the time.
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