Run-time power control scheme using software feedback loop for low-power real-time applications

Author

Lee, Seongsoo ; Sakurai, Takayasu

Author_Institution

Center for Collaborative Res., Tokyo Univ., Japan

fYear

2000

fDate

9-9 June 2000

Firstpage

381

Lastpage

386

Abstract

A novel hardware-software cooperative power control scheme, namely a software feedback loop, is proposed to lower power consumption of VLSI systems. The proposed runtime voltage and frequency control scheme guarantees the real-time execution of applications. It avoids interface problems and also provides "binary-code compatibility". Using a software analysis environment, the power control scheme is shown to achieve more than 90% power reduction for real-time MPEG-4 SP@L1 video encoding, taking into consideration the transition delay between voltage and frequency levels.

Keywords

VLSI; circuit feedback; computer architecture; digital signal processing chips; hardware-software codesign; power consumption; power control; real-time systems; video equipment; MPEG-4 SP@L1 video encoding; VLSI; binary-code compatibility; frequency control; hardware-software cooperative power control; low-power real-time applications; power consumption; power control chip; power reduction; real-time encoding; real-time execution; run-time power control; runtime voltage; software analysis; software feedback loop; transition delay; Application software; Delay; Encoding; Energy consumption; Feedback loop; Frequency control; MPEG 4 Standard; Power control; Runtime; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

Design Automation Conference, 2000. Proceedings of the ASP-DAC 2000. Asia and South Pacific

Conference_Location

Yokohama, Japan

Print_ISBN

0-7803-5973-9

Type

conf

DOI

10.1109/ASPDAC.2000.835129

Filename

835129