1. BY: ADAM BAIR Real-Time Operating Systems

2. What’s a Real-Time System? - A computer system that requires computation to be correct and done before a specified time period expires. - Embedded in specialized devices.

3. Types of Real-Time Systems Hard real-time system Soft real-time system

4. System Characteristics Purpose Size Cost effective Timing Requirements

5. Memory Allocation Real-addressing mode Dynamic relocation register Virtual memory

6. Real-Time System Features Priority-based scheduling Preemptive kernel  Preemption points  Synchronized mechanisms Minimized latency  Interrupt latency  Dispatch latency  Priority-inheritance protocol

7. Real-Time CPU Scheduling Periodic Processes Admission-control algorithm Rate-Monotonic Scheduling Algorithm Earliest-Deadline-First Scheduling Algorithm

8. Sources http://en.wikipedia.org/wiki/Real- time_operating_system http://en.wikipedia.org/wiki/Real- time_operating_system http://en.wikipedia.org/wiki/Real- time_system#History http://en.wikipedia.org/wiki/Real- time_system#History Gagne, Galvin, Silberschatz. Operating System Concepts 8 th edition