Graceful Performance Modulation for Power-Neutral Transient Computing Systems

被引：48

作者：

Balsamo, Domenico ^{[1
]}

Das, Anup ^{[1
]}

Weddell, Alex S. ^{[1
]}

Brunelli, Davide ^{[2
]}

Al-Hashimi, Bashir M. ^{[1
]}

Merrett, Geoff V. ^{[1
]}

Benini, Luca ^{[3
]}

机构：

[1] Univ Southampton, Pervas Syst Ctr, Elect & Comp Sci, Southampton SO17 1BJ, Hants, England

[2] Univ Trento, Dept Ind Engn, I-38123 Trento, Trento, Italy

[3] Univ Bologna, Dept Elect Elect & Informat Engn Guglielmo Marcon, I-40136 Bologna, Italy

来源：

IEEE TRANSACTIONS ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS | 2016年 / 35卷 / 05期

基金：

英国工程与自然科学研究理事会; 欧盟第七框架计划;

关键词：

Dynamic frequency scaling (DFS); energy harvesting; graceful performance modulation; transient computing; ENERGY MANAGEMENT; WIRELESS; LIFETIME;

D O I：

10.1109/TCAD.2016.2527713

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

Transient computing systems do not have energy storage, and operate directly from energy harvesting. These systems are often faced with the inherent challenge of low-current or transient power supply. In this paper, we propose "power-neutral" operation, a new paradigm for such systems, whereby the instantaneous power consumption of the system must match the instantaneous harvested power. Power neutrality is achieved using a control algorithm for dynamic frequency scaling, modulating system performance gracefully in response to the incoming power. Detailed system model is used to determine design parameters for selecting the system voltage thresholds where the operating frequency will be raised or lowered, or the system will be hibernated. The proposed control algorithm for power-neutral operation is experimentally validated using a microcontroller incorporating voltage threshold-based interrupts for frequency scaling. The microcontroller is powered directly from real energy harvesters; results demonstrate that a power-neutral system sustains operation for 4%-88% longer with up to 21% speedup in application execution.

引用

页码：738 / 749

页数：12

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