A Dynamic Real-time Scheduling Algorithm for Reduced Energy Consumption in I/O Devices

Authors

Rohini Krishnapura, University of Nebraska-LincolnFollow
Steve Goddard, University of Nebraska – LincolnFollow

Date of this Version

2003

Comments

University of Nebraska-Lincoln, Computer Science and Engineering
Technical Report # TR-UNL-CSE-2003-0010

Abstract

In real-time systems, Dynamic Power Management (DPM) techniques have traditionally centered on the CPU with less focus given to I/O. However, I/O-based DPM techniques have been popularly researched in non-real-time systems. These techniques focus on switching I/O devices to low power states based on some policy. These methods, however, are not applicable to realtime environments because of the non-deterministic nature of the policies. Recently, scheduling techniques to reduce power consumption of I/O devices in real-time systems have emerged. In this paper, we propose an online task scheduling algorithm, Slack Utilization for Reduced Energy (SURE), which utilizes slack in periodic task systems to reduce power consumption in I/O devices.