Comparison between power gating and DVFS from the viewpoint of energy efficiency

Author

Inoue, Atsuki

Author_Institution

Fujitsu Labs. Ltd., Kawasaki, Japan

fYear

2012

fDate

19-21 March 2012

Firstpage

601

Lastpage

608

Abstract

To increase the energy efficiency of modern LSIs, supply voltage control techniques (power gating and dynamic voltage frequency scaling) have been widely used and the energy efficiency of fine grain temporal controls in both cases have been discussed. In this paper, we applied dead time constraint, compared the energy efficiencies and formulated the boundary condition that power gating is more energy efficient than DVFS. The formulation is applied to discuss the future trend of energy efficiency using ITRS roadmap and it was found that DVFS would be still effective with high-performance technology, however, it will not be effective with low-operating-power technology.

Keywords

energy conservation; large scale integration; low-power electronics; voltage control; DVFS; ITRS roadmap; LSIs; boundary condition formulation; dead time constraint application; dynamic voltage frequency scaling; energy efficiency; fine grain temporal control; high-performance technology; low-operating-power technology; power gating; supply voltage control technique; Energy consumption; Energy efficiency; Energy loss; Logic gates; Power supplies; Transistors; Voltage control; DIBL; DVFS; Energy gain; ITRS; Power gating;

fLanguage

English

Publisher

ieee

Conference_Titel

Quality Electronic Design (ISQED), 2012 13th International Symposium on

Conference_Location

Santa Clara, CA

ISSN

1948-3287

Print_ISBN

978-1-4673-1034-5

Type

conf

DOI

10.1109/ISQED.2012.6187555

Filename

6187555