Power Efficient Redundant Execution for Chip Multiprocessors

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Provided by: Linkoping University
Topic: Hardware
Format: PDF
In this paper, the authors describe the design of a power efficient micro-architecture for transient fault detection in Chip Multi-Processors (CMPs). They introduce a new per-core Dynamic Voltage and Frequency Scaling (DVFS) algorithm for their architecture that significantly reduces power dissipation for redundant execution with a minimal performance overhead. Using cycle accurate simulation combined with a simple first order power model, they estimate that their architecture reduces dynamic power dissipation in the redundant core by an mean value of 79% and a maximum of 85% with an associated mean performance overhead of only 1.2%.
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