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MICRO
2007
IEEE

Mitigating Parameter Variation with Dynamic Fine-Grain Body Biasing

14 years 5 months ago
Mitigating Parameter Variation with Dynamic Fine-Grain Body Biasing
Parameter variation is detrimental to a processor’s frequency and leakage power. One proposed technique to mitigate it is Fine-Grain Body Biasing (FGBB), where different parts of the processor chip are given a voltage bias that changes the speed and leakage properties of their transistors. This technique has been proposed for static application, with the bias voltages being programmed at manufacturing time for worst-case conditions. In this paper, we introduce Dynamic FGBB (D-FGBB), which allows the continuous re-evaluation of the bias voltages to adapt to dynamic conditions. Our results show that D-FGBB is very versatile and effective. Specifically, with the processor working in normal mode at fixed frequency, D-FGBB reduces the leakage power of the chip by an average of 28–42% compared to static FGBB. Alternatively, with the processor working in a high-performance mode, D-FGBB increases the processor frequency by an average of 7–9% compared to static FGBB — or 7–16% comp...
Radu Teodorescu, Jun Nakano, Abhishek Tiwari, Jose
Added 04 Jun 2010
Updated 04 Jun 2010
Type Conference
Year 2007
Where MICRO
Authors Radu Teodorescu, Jun Nakano, Abhishek Tiwari, Josep Torrellas
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