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Lessons Learned from the 80-core Tera-scale Research Processor

Authored on: May 1, 2009 by Nitin Dighe et al

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Sustained tera-scale-level performance within an affordable power envelope is made possible by an energy-efficient, power-managed simple core, and by a packet-switched, two-dimensional mesh network on a chip. From our research, we learned that (1) the network consumes almost a third of the total power, clearly indicating the need for a new approach, (2) fine-grained power management and low-power design techniques enable peak energy efficiency of 19.4 GFLOPS/Watt and a 2X reduction in standby leakage power, and (3) the tiled design methodology quadruples design productivity without compromising design quality.
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