ch19 - Silberschatz Galvin and Gagne ©2009 Chapter 19...

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Unformatted text preview: Silberschatz, Galvin and Gagne ©2009 Chapter 19: Real-Time Systems 19.2 Silberschatz, Galvin and Gagne ©2009 Chapter 19: Real-Time Systems ■ System Characteristics ■ Features of Real-Time Systems ■ Implementing Real-Time Operating Systems ■ Real-Time CPU Scheduling ■ An Example: VxWorks 5.x 19.3 Silberschatz, Galvin and Gagne ©2009 Objectives ■ To explain the timing requirements of real-time systems ■ To distinguish between hard and soft real-time systems ■ To discuss the defining characteristics of real-time systems ■ To describe scheduling algorithms for hard real-time systems 19.4 Silberschatz, Galvin and Gagne ©2009 Overview of Real-Time Systems ■ A real-time system requires that results be produced within a specified deadline period ■ An embedded system is a computing device that is part of a larger system (I.e. automobile, airliner) ■ A safety-critical system is a real-time system with catastrophic results in case of failure ■ A hard real-time system guarantees that real-time tasks be completed within their required deadlines ■ A soft real-time system provides priority of real-time tasks over non real-time tasks 19.5 Silberschatz, Galvin and Gagne ©2009 System Characteristics ■ Single purpose ■ Small size ■ Inexpensively mass-produced ■ Specific timing requirements 19.619....
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This note was uploaded on 09/11/2011 for the course CIT 219 taught by Professor Staff during the Summer '08 term at Miami University.

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ch19 - Silberschatz Galvin and Gagne ©2009 Chapter 19...

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