Processors

Modeling and Characterizing Power Variability in Multicore Architectures

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Executive Summary

Parameter variation due to manufacturing error will be an unavoidable consequence of technology scaling in future generations. The impact of random variation in physical factors such as gate length and interconnect spacing will have a profound impact on not only performance of chips, but also their power behavior. While circuit-level techniques such as adaptive body-biasing can help to mitigate mal-fabricated chips, they cannot completely alleviate severe within die variations forecasted for near future designs. Despite the large impact that power variability will have on future designs, there is a lack of published work that examines architectural implications of this phenomenon.

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