Power Policy Manager

Introduction

The Power Policy Manager (PPM) The PPM is a layered, system-wide power policy framework. Most power managers assume a binary power policy. For example, they change power policies when AC power is removed, but don’t provide a way for users to override these settings. Many policy managers that do provide user choice attempt to hardcode exceptions, and do not provide a way for users to select multiple power policies.

What is needed is a flexible power policy manager that allows users to select multiple policies, and easily modify those policies to fit their system. The system should leverage existing system power management capabilities, such as Advanced Configuration and Power Interface (ACPI). It should also allow users to write their own power management code for new hardware. Most importantly, it should be a system-wide policy manager that focuses on more than just the CPU frequency.