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- W2066999924 abstract "Conventional computer-aided design (CAD) methodologies optimize a processor module for correct operation and prohibit timing violations during nominal operation. We propose recovery-driven design, a design approach that optimizes a processor module for a target timing error rate (ER) instead of correct operation. The target ER is chosen based on how many errors can be gainfully tolerated by a hardware or software error resilience mechanism. We show that significant power benefits are possible from a recovery-driven design approach that deliberately allows errors caused by voltage overscaling to occur during nominal operation, while relying on an error resilience technique to tolerate these errors. We present a detailed evaluation and analysis of such a CAD methodology that minimizes the power of a processor module for a target ER. We show how this design-level methodology can be extended to design recovery-driven processors—processors that are optimized to take advantage of hardware or software error resilience. We also discuss a gradual slack recovery-driven design approach that optimizes for a range of ERs to create soft processors—processors that have graceful failure characteristics and the ability to trade throughput or output quality for additional energy savings over a range of ERs. We demonstrate significant power benefits over conventional design—11.8% on average over all modules and ER targets, and up to 29.1% for individual modules. Processor-level benefits were 19.0%, on average. Benefits increase when recovery-driven design is coupled with an error resilience mechanism or when the number of available voltage domains increases." @default.
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- W2066999924 date "2012-03-01" @default.
- W2066999924 modified "2023-10-10" @default.
- W2066999924 title "Recovery-Driven Design: Exploiting Error Resilience in Design of Energy-Efficient Processors" @default.
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- W2066999924 doi "https://doi.org/10.1109/tcad.2011.2172610" @default.
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