Operating System Tutorial

Operating System Tutorial Types of Operating System Evolution of Operating System Functions of Operating System Operating System Properties Operating System Services Components of Operating System Needs of the Operating System

Operating Systems

Linux Operating System Unix Operating System Ubuntu Operating System Chrome Operating Systems Fedora Operating System MAC Operating System MS Windows Operating System Solaris Operating System Cooperative Operating System CorelDRAW Operating System CentOS FreeBSD Operating Systems Batch Operating System MS-DOS Operating System Commercial Mobile Operating Systems


Difference Between Multi-programming and Multitasking Difference between C-LOOK and C-SCAN Difference between Rotational Latency and Disk Assess Time Trap vs Interrupt Difference between C-SCAN and SSTF Difference between SCAN and FCFS Difference between Seek Time and Disk Access Time Difference between SSTF and LOOK Difference between Process and Program in the Operating System Difference between Protection and Security in Operating System

How To

How to implement Monitors using Semaphores How to Install a Different Operating System on a PC


What is Kernel and Types of Kernel What is DOS Operating System What is Thread and Types of Thread What is Process Scheduler and Process Queue What is Context Switching What is CPU Scheduling What is Producer-Consumer Problem What is Semaphore in Operating System Monitors in Operating System What is Deadlock What is Paging and Segmentation What is Demand Paging What is Virtual Memory What is a Long term Scheduler What is Page Replacement in Operating System What is BSR Mode What is Convoy Effect What is Job Sequencing in Operating System Why is it critical for the Scheduler to distinguish between I/O-bound and CPU-bound programs Why is there a Need for an Operating System


Process Management Process State Scheduling Algorithm FCFS (First-come-First-Serve) Scheduling SJF (Shortest Job First) Scheduling Round-Robin CPU Scheduling Priority Based Scheduling HRRN (Highest Response Ratio Next) Scheduling Process Synchronization Lock Variable Mechanism TSL Mechanism Turn Variable Mechanism Interested Variable Mechanism Deadlock Avoidance Strategies for Handling Deadlock Deadlock Prevention Deadlock Detection and Recovery Resource Allocation Graph Banker’s Algorithm in Operating System Fixed Partitioning and Dynamic Partitioning Partitioning Algorithms Disk Scheduling Algorithms FCFS and SSTF Disk Scheduling Algorithm SCAN and C-SCAN Disk Scheduling Algorithm Look and C-Look Disk Scheduling Algorithm File in Operating System File Access Methods in Operating System File Allocation Method Directory Structure in Operating System N-Step-SCAN Disk Scheduling Feedback Queue in Operating System Contiguous Memory Allocation in Operating System Real-time Operating System Starvation in Operating System Thrashing in Operating System 5 Goals of Operating System Advantages of Operating System Advantages of UNIX Operating System Bit Vector in Operating System Booting Process in Operating System Can a Computer Run Without the Operating System Dining Philosophers Problem in Operating System Free Space Management in Operating System Inter Process Communication in Operating System Swapping in Operating System Memory Management in Operating System Multiprogramming Operating System Multitasking Operating Systems Multi-user Operating Systems Non-Contiguous Memory Allocation in Operating System Page Table in Operating System Process Scheduling in Operating System Segmentation in Operating System Simple Structure in Operating System Single-User Operating System Two Phase Locking Protocol Advantages and Disadvantages of Operating System Arithmetic operations in binary number system Assemblers in the operating system Bakery Algorithm in Operating System Benefits of Ubuntu Operating System CPU Scheduling Criteria in Operating System Critical Section in Operating System Device Management in Operating System Linux Scheduler in Operating System Long Term Scheduler in Operating System Mutex in Operating System Operating System Failure Peterson's Solution in Operating System Privileged and Non-Privileged Instructions in Operating System Swapping in Operating System Types of Operating System Zombie and Orphan Process in Operating System 62-bit operating system Advantages and Disadvantages of Batch Operating System Boot Block and Bad Block in Operating System Contiguous and Non - Contiguous Memory Allocation in Operating System Control and Distribution Systems in Operations Management Control Program in Operating System Convergent Technologies in Operating System Convoy Effect in Operating System Copy Operating Systems to SSD Core Components of Operating System Core of UNIX Operating System Correct Value to return to the Operating System Corrupted Operating System Cos is Smart Card Operating System Cosmos Operating Systems Examples Generation of Operating System Hardware Solution in Operating System Process Control Block in Operating System Function of Kernel in Operating System Operating System Layers History of Debian Operating Systems Branches and Architecture of Debian Operating Systems Features and Packages of Debian Operating Systems Installation of Operating System on a New PC Organizational Structure and Development in Debian Operating Systems User Interface in Operating System Types Of Memory in OS Operating System in Nokia Multilevel Paging in OS Memory Mapping Techniques in OS Memory Layout of a Process in Operating System Hardware Protection in Operating System Functions of File Management in Operating System Core of Linux Operating System Cache Replacement Policy in Operating System Cache Line and Cache Size in Operating System What is Memory Mapping? Difference Between Network Operating System And Distributed Operating System What is the difference between a Hard link and a Soft Link? Principles of Preemptive Scheduling Process Scheduling Algorithms What is NOS? What is the Interrupt I/O Process? What is Time Sharing OS What is process termination? What is Time-Sharing Operating System What is Batch File File system manipulation What is Message-passing Technique in OS Logical Clock in Distributed System

Real-time Operating System

In this essay, we will thoroughly understand the real-time operating system.

Real-Time Operating System: What do you mean?

For any task to be completed, a real-time operating system (RTOS), a special-purpose operating system used in computers, must meet rigorous time requirements. It is mostly utilized in systems where the output of calculations is used to modify a process while running. A sensor to monitor the event is used to provide information about external events to the computer whenever they happen. The operating system interprets the signal from the sensor as an interrupt. When an interrupt occurs, the operating system starts a particular process or group of processes to handle it.

These include telephone switching systems, industrial control, and real-time simulations. Processing must adhere to the constraints of this type of system. If this keeps happening, the system will malfunction.

Real-time Operating System

Unless a higher priority interrupt happens while this process runs, it continues without interruption. While lower-priority interruptions should be retained in a buffer to be handled later, the interrupt with the highest priority must be permitted to start the process. In a system like this, interruption control is crucial.

Real-time operating systems use special-purpose operating systems since regular operating systems cannot deliver the required performance.

Real-time operating systems include, among others,

  1. MTS.
  2. Lynx.
  3. QNX.
  4. And VxWorks.

Applications of the Real-Time Operating System (RTOS):

RTOS is utilized in real-time applications, which have strict time constraints.

  1. In the Radar device, real-time running structures are utilized.
  2. Missile guidance uses real-time running structures.
  3. Online inventory trade uses real-time running structures.
  4. The mobile phone switching device uses real-time running mechanisms.
  5. Air site visitors control structures using real-time running structures.
  6. Medical imaging systems employ real-time running structures.
  7. The Fuel injection device uses real-time running structures.
  8. The Traffic modification device uses real-time running structures.
  9. Autopilot trip simulators use real-time running structures.

Types of real-time operating systems

The three categories of RTOS systems are as follows:

Real-time Operating System

Hard real-time operating systems

Operating systems that guarantee hard real-time: These systems ensure that crucial processes are accomplished in a certain amount of time.

For instance, an automobile body is welded by a robot. It is a difficult real-time system that demands complete robot welding of the automobile barely on time because the car must be sold before the robot welds too early or too late.

All crucial actions in Hard RTOS must be finished by the deadline or within the allotted time frame.

As an illustration, consider the airbags and handle that automobile manufacturers give for the driver's seat. The airbags expand when the driver hits the brakes at that precise moment, preventing the driver's head from striking the handle.

The system must ensure that an instruction to sell a certain share is executed within a specified window. Otherwise, a sudden decline in the market might result in the trader suffering a significant loss.

Soft real-time operating system.

Real-time systems come across explicit, programmer-defined, and regulated procedures. For instance, digital audio systems, multimedia systems, etc. Concerning managing a single external event, a different method is modified. When the associated event occurs, which is alerted by an interrupt, the procedure is initiated.

By planning processes for autonomous execution, multitasking operations are made possible. Each process is given a level of priority based on the relative significance of the event it supports. Real-time systems employ a scheduling method known as priority-based pre-emptive scheduling.

Through the use of the operating system, Soft RTOS accommodates a few delays. It's possible under this type of RTOS that a certain job has a deadline that must be met, but a brief delay is allowed. Cut-off dates are therefore handled gently by this type of RTOS.

This kind of technology, for instance, is utilized in livestock price quote systems and online transaction systems.

Firm real-time operating system

This kind of RTOS must also adhere to deadlines. Despite its little impact, missing a deadline might lead to unforeseen events, such as a product quality decline. Multimedia software is an illustration.

Additionally, RTOS in businesses must adhere to deadlines. Although the absence of a deadline might not significantly impact, it could have unintended consequences like a significant reduction in a product's quality.

This technology, for instance, is utilized in several multimedia applications.

Advantages of real-time operating system

The following are some advantages of real-time operating systems:

  1. Real-time operating systems make designing, creating, and running real-time applications simple.
  2. Because the real-time working structures are so small, they take up substantially less memory.
  3. The highest possible device and system usage in a real-time operating system.
  4. Give running programs more priority while giving queued apps less attention.
  5. Since RTOS programs are compact, they may be used in embedded systems for transportation and other applications.
  6. These kinds of systems don't make mistakes.
  7. These systems are the best at managing memory allocation.
  8. Maximum consumption - Fullest possible use of tools and systems increased output from all the resources.
  9. Application Focus - Give running apps more attention and queued applications less so.
  10. Error Free - These kinds of systems don't make mistakes.

Disadvantages of real-time operating system

The following are some drawbacks of real-time operating systems: o Real-time operating systems have complex design concepts and are highly expensive to construct.

  1. Real-time operating systems can eat up important CPU cycles and are quite sophisticated.
  2. Limited Tasks - Only a small number of tasks are active at once, and they focus primarily on a small number of applications to reduce mistakes.
  3. Use many system resources - Sometimes, system resources are expensive and subpar.
  4. Thread Priority - Setting thread priority is not recommended since these systems are not particularly effective at switching tasks.
  5. Minimal Task Switching - RTOS uses a minimum amount of task switching.
  6. Real-time operating systems can eat up important CPU cycles and are quite sophisticated.
  7. Limited Tasks - Only a small number of tasks are active at once, and they focus primarily on a small number of applications to reduce mistakes.
  8. Use many system resources - Sometimes, system resources are expensive and subpar.
  9. Thread Priority - Setting thread priority is not.