The document discusses real-time operating systems (RTOS). It defines an RTOS as an OS intended to serve real-time application requests. It classifies RTOS as hard, firm, or soft based on adherence to deadlines. It describes RTOS architecture including tasks, synchronization, communication, memory management, and other kernel functions. It lists features such as multithreading, priorities, communication, and short latencies. Finally, it provides examples of widely used RTOS like QNX, RTLinux, VxWorks, and Windows CE.

1. C.B.KORE POLYTECHNIC
CHIKODI
PAPER PRESENTATION ON:
REAL TIME OPERATING SYSTEM
BY: SHARVANI MUSANDI
V SEM EC

2. CONTENTS
 INTRODUCTION
 CLASSIFICATION
 ARCHITECTURE
 FEATURES OF RTOS
 WIDELY USED RTOS
 CONCLUSION

3. INTRODUCTION
 DEFINATION-
A real-time operating system (RTOS) is
an operating system (OS) intended to
serve real-time application requests
 EXAMPLE

4. CLASSIFICATION
 HARD RTOS-
 These type of RTOS strictly adhere to the
deadline associated with the tasks
 FIRM RTOS-
 These type of RTOS are also required to
adhere to the deadlines
 SOFT RTOS

5. ARCHITECTURE

6. RTOS KERNEL

7. TASK MANAGEMENT

8. SYNCRONIZATION AND COMMUNICATION
FIG (A) SYCHRONIZATION
FIG(B) INTERTASK COMMUNICATION

9. MEMORY MANAGEMENT
 Non-real-time operating systems offer
memory allocation services from what is
termed a Heap
 STACK - Stack management is used during
context switching for TCBs
 RTOS does it by a mechanism known as
Pools

10. OTHER KERNEL FUNCTIONS
 Timer Management
 Interrupt and event handling
 Device I/O Management

11. FEATURES OF RTOS
 MULTITHREADING AND PREEMPT
ABILITY
 THREAD PRIORITY
 INTERTASK COMMUNICATION AND SYNC
 PRIORITY INHERITANCE
 SHORT LATENCIES

12. WIDELY USED RTOS
These are the best known, most widely
deployed real-time operating systems.
 QNX
 RTLinux
 VxWorks
 Windows CE

13. REFERENCES
 http://en.wikibooks.org/wiki/Embedded_Syste
ms/Real-Time_Operating_Systems
 www.onesmartclick.com/rtos/rtos.html
 http://www.engineersgarage.com/articles/rtos
-real-time-operating-system?page=6