A Power-Aware Scheduling Algorithm with Voltage Transition Overhead

전압 변경 오버헤드를 고려한 전력 관리 알고리즘

  • 권혁성 (영남대학교 컴퓨터 공학과) ;
  • 안병철 (영남대학교 컴퓨터 공학과)
  • Received : 2008.02.11
  • Accepted : 2008.04.16
  • Published : 2008.05.31

Abstract

As portable devices are used widely, power management algorithm is essential to extend battery use time on small-sized battery power. Although many methods have been proposed, they assumed the voltage transition overhead was negligible or was considered partially. However, the voltage transition overhead might not guarantee to schedule real-time tasks in portable multimedia systems. This paper proposes the adaptive power-aware algorithm to minimize the power consumption by considering the voltage transition overhead. It selects only a few discrete frequencies from the whole frequencies of a system and adjusts the interval between two consecutive frequencies based on the system utilization to reduce the number of frequency change. This algorithm saves the power consumption about 10 to 25 percent compared to a CC RT-DVS method and a frequency-smoothing method.