RTOS- Real Time Operating Systems
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Real-time operating systems (RTOS) are specialized operating systems designed to run applications with precise timing and high reliability. An RTOS is single-tasked compared to general purpose OSs which run multiple tasks simultaneously. There are three main types of RTOS: hard, firm, and soft. An RTOS provides functions like task management, scheduling, resource allocation, and interrupt handling. Common applications of RTOS include web servers, aircraft control systems, medical devices, and industrial automation.
![REFERENCES
[1] National Instrument, (2013, Nov.22), What is a Real-Time Operating
System (RTOS)? Available: http://www.ni.com/white-paper/3938/en/
[2] H.ARORA, (2012, FEB.6), what is RTOS? Real Time Operating
Systems Basics , Available: http://www.thegeekstuff.com/2012/02/rtosbasics/
[3] W.Cedeo and P.Laplante, (2015), An Overview of Real-Time Operating
Systems, Available: http://jla.sagepub.com/content/12/1/40.full
[4] Pantech solutions, REAL TIME OPERATING SYSTEM (RTOS)
CONCEPTS, India.
[5] silberchatz, glaving and Gange,Operating system concepts 8th
ed.USA:2009.
[6] Renesas Electronics Corporation,(2010, Jan.4),General RTOS
Concepts, Available: http://www.renesas.com
1/14/2017
12](https://image.slidesharecdn.com/rtos-presentation-170114080326/85/RTOS-Real-Time-Operating-Systems-12-320.jpg)
RTOS- Real Time Operating Systems
- 1. REAL TIME OPERATING SYSTEM(RTOS) By Bayar Shahab Supervised by Dr. Tara Yahya
- 2. OUTLINE ֍ What is RTOS? ֍ Types of RTOS? ֍ Characteristics of RTOS ֍ Functions of RTOS ֍ RTOS Architecture ֍ Advantages and disadvantages of RTOS ֍ Applications of RTOS 2 1/14/2017
- 3. WHAT IS RTOS? ▪ Is an operating system that is specially designed to run applications with very precise timing and a high degree of reliability(National instruments, 2013). ▪ Single tasked in opposition to generic OSs Which run several tasks ▪ What is jitter? 3 1/14/2017
- 4. TYPES OF RTOS Hard RTOS Meet required deadlines within the bounded time otherwise it may lead to catastrophic error Firm RTOS Deadline may not cause a catastrophic or fatal error, but may cause undesired effects or may degrade the performance of the system Soft RTOS Missing a deadline may not be catastrophic and cause fatal errors, but they are undesired and unwanted(Best effort). 1/14/2017 4
- 5. CHARACTERISTICS OF RTOS 1/14/2017 5 Reliability Predictability PerformanceScalability Compactness
- 6. FUNCTIONS OF RTOS 1/14/2017 6 Task management Scheduling Resource allocation Interrupt handling
- 8. ADVANTAGES AND DISADVANTAGES OF RTOS Advantages • Task scheduling and shifting. • Deterministic behavior. • Inter-task communication. • Maximum Consumption. • Error Free. • Task can have priority. • Scalable. • Portable. • Provision for interrupts Disadvantages • Sometimes cost is more. • Availability of Development tools. • Low support for variety of peripheral devices. • Low Protection and Security mechanisms. • Low multi-tasking. • Limited Tasks. • Multiple Users. • Multiple Modes. • Not easy to program 1/14/2017 8
- 9. APPLICATIONS OF RTOS • Web server. • Aircraft control. • Radar systems. • Network switching control systems. • Satellite monitoring systems. • GPS system. • Nuclear reactor systems. • MRI 1/14/2017 9
- 11. Questions ??????
- 12. REFERENCES [1] National Instrument, (2013, Nov.22), What is a Real-Time Operating System (RTOS)? Available: http://www.ni.com/white-paper/3938/en/ [2] H.ARORA, (2012, FEB.6), what is RTOS? Real Time Operating Systems Basics , Available: http://www.thegeekstuff.com/2012/02/rtosbasics/ [3] W.Cedeo and P.Laplante, (2015), An Overview of Real-Time Operating Systems, Available: http://jla.sagepub.com/content/12/1/40.full [4] Pantech solutions, REAL TIME OPERATING SYSTEM (RTOS) CONCEPTS, India. [5] silberchatz, glaving and Gange,Operating system concepts 8th ed.USA:2009. [6] Renesas Electronics Corporation,(2010, Jan.4),General RTOS Concepts, Available: http://www.renesas.com 1/14/2017 12
Editor's Notes
- #4: What is OS at first? An interface b/w hardware & software that manages and controls program execution
- #5: Hard RTOS- Nuclear reactor control Firm RTOS- Loosing some bits from codec of music Soft RTOS- Delay in loading a website degrades the system
- #6: Reliability- Availability and minimizing the down Time Predictable- RTOS have to be predictable to have reliable results and they have to be tested at design time(Test-Bench) Performance- meetting deadline+correct result+Hardware mesures Scalability- Being Modulare for adding and deleteing parts Compactness- Adjust RTOS to applications size type
- #7: Task management- A task is a program that executes on the computer,- setting priorities, durations and criticality for the tasks-TCB Scheduling - use available resources between existing tasks and to determine which tasks should be run next - Clock driven scheduling(periodic tasks) - weighted round robin scheduling (FIFO) - priority scheduling(Static –design time OR dynamic Run time) Resource Allocation- Allocating Resource for running tasks-semaphores(Locking tasks)- priority inversion(Low locked high) Interrupt Handling- signal that terminates normal program execution(ISR) - interrupt latency
- #8: RTOS Architecture depends on the RTOS system or application, but generally it has kernel-task management, inter-process communication, interrupt handling, memory management and scheduling, I/O.