Andrew Landoch

1
Andrew Landoch

• Real-Time Operating Systems Overview

2
Introduction

• Real-Time OS defined
• Real-Time OS Characteristics
• Examples of Real-Time Operating Systems
• Applications

3
Real-Time OS Definition

• Real-Time operating system is
• one whose correctness involves both the logical
  correctness of the outputs and their timeliness.
  
• Practical Example

4
Real-Time OS Definition

• Hard Real-Time OS
• Firm Real-Time OS
• Soft Real-Time OS

5
Real-Time OS Characteristics

• Must handle multiple threads
• Must be able to prioritize tasks
• Must be able to schedule based on priorities
• Produce results in predictable timeframe

6
Real-Time OS Characteristics

• Admission Control
• Resource Reservation
• Hard/Soft Real-Time Guarantees

7
Real-Time OS Examples

• Small, Proprietary Kernels
• Quality of Service Kernels
• Real-Time Extensions of Commercial Operating
  Systems

8
Real-Time Extensions of Commercial Operating
Systems
9
Real-Time OS Applications

• Aircraft
• Flight Control Systems
• Maintenance Diagnostics
• Automotive
• Control and Monitoring Systems
• Safety Critical Systems
• Android
• ????????

10
Conclusion

• Definition
• Hard Real-Time OS
• Safety Critical Applications were results are
  time critical

11
References

• 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.