Vassal: Loadable Scheduler Support for Multi-Policy Scheduling

The Problem

Overview of Vassal

Outline

Windows NT Scheduling

NT Scheduling Precedence

NT Scheduling Events

Windows NT Timers

Outline

Separate Policy from Mechanism

Details of Present Prototype

Vassal Entities

Vassal Architecture

Interface Modifications

Registering a Scheduler

Communicating with a Scheduler

Precisely Timed Events

Vassal Interfaces

Outline

Sample Real-Time Scheduler

Using The Real-Time Scheduler

Execution of Sample Code

Outline

Windows NT Kernel Changes

Context Switch Times

Writing a Scheduler

Periodic Wakeup Times

Outline

Vassal Take-Home

Limitations and Future Work

Related Work

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