Measuring Code Optimization Impact on Voltage Noise

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Provided by: Harvard University
Topic: Hardware
Format: PDF
In this paper, the authors characterize the impact of compiler optimizations on voltage noise. While intuition may suggest that the better processor utilization ensured by optimizing compilers results in a small amount of voltage variation, their measurements on a Intel R Core Duo processor show the opposite - the majority of SPEC CPU2006 benchmarks exhibit more voltage droops when aggressively optimized. They show that this increase in noise could be sufficient for a net performance decrease in a typical-case, resilient design.
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