Transcript Landoch_RealTimeOS_Presentation

Real-Time Operating Systems Overview
ANDREW LANDOCH
INTRODUCTION
Real-Time OS defined
 Real-Time OS Characteristics
 Examples of Real-Time Operating
Systems
 Applications
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REAL-TIME OS DEFINITION
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Real-Time operating system is:
 “one
whose correctness involves both the
logical correctness of the outputs and their
timeliness”.
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Practical Example
REAL-TIME OS DEFINITION
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Hard Real-Time OS
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Firm Real-Time OS
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Soft Real-Time OS
REAL-TIME OS CHARACTERISTICS
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Must handle multiple threads
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Must be able to prioritize tasks
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Must be able to schedule based on
priorities
Produce results in predictable timeframe
REAL-TIME OS CHARACTERISTICS

Admission Control

Resource Reservation
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Hard/Soft Real-Time Guarantees
REAL-TIME OS EXAMPLES

Small, Proprietary Kernels
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Quality of Service Kernels

Real-Time Extensions of Commercial
Operating Systems
REAL-TIME EXTENSIONS OF COMMERCIAL
OPERATING SYSTEMS
REAL-TIME OS APPLICATIONS

Aircraft
 Flight
Control Systems
 Maintenance Diagnostics

Automotive
 Control
and Monitoring Systems
 Safety Critical Systems

Android
 ????????
CONCLUSION

Definition
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Hard Real-Time OS

Safety Critical Applications were results
are time critical
REFERENCES
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CEDENO, W. AND LAPLANTE, P.A. 2007. An overview of real-time operating systems.
Journal of the Association for Laboratory Automation 12, 40-45.
IEEE. Information Technology-Portable Operating System Interface (POSIX)-Part 1;
System Application: Program Interface (API) [C Language]. 1996 ANSI/IEEE Std
1003.1.
MONIGIA, BHUPINDER S., MADISETTI, VIJAY K., 2010, Reliable real-time applications
on Android OS. http://users.ece.gatech.edu/~vkm/Android_Real_Time.pdf.
SCHMIDT, D.C. 2002. Middleware for real-time and embedded systems.
Communications of the ACM 45, 43-48.
STANKOVIC, J.A. 1996 Strategic directions in real-time and embedded systems. ACM
Computing Survey. 28, 751-763.
STANKOVIC, J.A. AND RAJKUMAR, R. 2004 Real-time operating systems. 28, 237-253.
SUSEELA, A.L. AND KUMAR, V.L. 2005. Embedded systems in real time applications,
design and architecture. Ubiquity 2005, 2-2.
ZUBERI, KHAWAR M., PILLAI, PADMANABHAN, SHIN, KANG G., IMANI, TAKAAKI,
NAGAURA, WATARU, SUZUKI, SHOJI 1998. EMERALDS-OSEK: A small real-time
operating system for automotive control. Society of Automotive Engineers Congress and
Exposition, 1999.