Abstract
We have defined a flexible latency-insensitive design style called Globally Ratiochronous Locally Synchronous (GRLS), based on quantized voltage levels and rationally-related clock frequencies. In this paper we present the infrastructure necessary to enable Distributed DVFS in such a system and analyze its overheads, quantitatively showing how, with minimal overheads, we obtain energy benefits that are close to those of a totally ideal GALS approach. The benefits that we show, coupled with the complexity and performance benefits of GRLS, which we briefly analyze, show how this approach is a strong competitor to GALS.
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