System-level mitigation of WID leakage power variability using body-bias islands

Adaptive Body Biasing (ABB) is a popularly used technique to mitigate the increasing impact of manufacturing process variations on leakage power dissipation. The efficacy of the ABB technique can be improved by partitioning a design into a number of “body-bias islands,” each with its individual body-bias voltage. In this paper, we propose a system-level leakage variability mitigation framework to partition a multiprocessor system into body-bias islands at the processing element (PE) granularity at design time, and to optimally assign body-bias voltages to each island post-fabrication. As opposed to prior gate- and circuit-level partitioning techniques that constrain the global clock frequency of the system, we allow each island to run at a different speed and constrain only the relevant system performance metrics - in our case the execution deadlines. Experimental results show the efficacy of the proposed framework in reducing the mean and standard deviation of leakage power dis...

• Type: Conference
• Year: 2008
• Where: CODES
• Authors: Siddharth Garg, Diana Marculescu
• Keywords: Body-bias Islands, CODES 2008, Hardware-Software Codesign, Leakage Power Dissipation, System-level Leakage Variability