Exploiting Application Resiliency for Energy-Efficient ... - IEEE Xplore
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Exploiting Application Resiliency for Energy-Efficient ... - IEEE Xplore
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Exploiting Application Resiliency for Energy-Efficient and AdequatelyReliable Operation Georgios Karakonstantis, David Atienza and Andy Burg EPFL, Lausanne, Switzerland Currently, manufacturers go to great lengths for mitigating the effects of parametric variations and scaled supply voltages by adopting conservative layout rules and by introducing several mechanisms providing redundancy on various layers of design abstraction. Such measures may have accomplished to hide any inaccurate behavior of nanometer circuits from the application layers and maintain acceptable yield levels, but unfortunately the large energy, performance, and area overheads that they incur limit their viability, especially as we move beyond the 45nm node. Such a reality has urged us to rethink the current design flows and question if such considerable overhead is really required given that many modern signal-processing workloads such as in multimedia, communications, or biomedical systems are inherently complexity/energy-scalable and can even tolerate a degree of imprecision in their computations and stored data. By taking advantage of this inherent resilience of many applications and trading off output precision and quality of service we could reduce energy usage and reliability costs, since by allowing some computations to be approximate we can alleviate the burden of correctness overhead imposed by the traditional design paradigm. In this paper, we discuss methods that could reveal and exploit the resilience and certain characteristics of biomedical and communication applications for achieving adequatelyreliable and energy efficient operation, while limiting or even avoiding the penalties required by traditional approaches.
