The Case for Higher-Level Power Management

4/1/99


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Table of Contents

The Case for Higher-Level Power Management

Position Statement

Outline of Talk

Goal: To Reduce Energy Consumption

-> Role for Operating System and Application Collaboration

Frustrations

Application-Driven Case Study: Hikerís Buddy

Hikers Buddy (in Native Habitat)

Global Positioning System

On the Trail

Power-Related States

Power-Related States

Power Mgt in Hikerís Buddy

Experimentation

Method

What are the Costs? Measuring Power Consumption (PalmPilot Pro)

Reducing Energy Consumption

What are the Highest Costs in Hikerís Buddy?

Power States Model of Hikerís Buddy (GPS Polling)

Intuition for Reducing Energy Consumption of GPS Operation

Effect of Polling Timeouts

Wishlist for Power-wise OS

Related Work

Conclusions

Author: Carla Schlatter Ellis

Email: carla@cs.duke.edu

Home Page: //www.cs.duke.edu/~carla/