5 Advantages and Disadvantages of Real Time Operating System | Drawbacks & Benefits of Real Time Operating System

What is Real Time Operating System ?

Real Time Operating System (RTOS) is a kind of system software that is designed tocarry out different tasks simultaneously along with real time output. The execution of tasks is implemented in a fixed time basis without any delay. Even if the system undergoes the same failure in different occasions, there will be no difference in the results. 

What are the types of Real Time Operating System ? 

A CPU will be able to execute only a single task at a given time. However, a real time operating system creates an illusion of multiple program executions. This is done by switching tasks simultaneously. Based on the type of execution, there are 2 types of real time operating systems. Those are the Hard RTOS and Soft RTOS. A Hard RTOS delivers results on exact time basis. While a SOFT RTOS gives less importance when it comes to time and accuracy. 

Although real time operating systems are able to deliver timely results, they aren't flawless. Similar to other operating systems, RTOS too includes certain benefits and drawbacks. In case of a device development, it is crucial to consider all the pros and cons.

In this article, I will be exploring about 5 Advantages and Disadvantages of Real Time Operating System | Drawbacks & Benefits of Real Time Operating System. Though this post, you will know the pros and cons of using real time operating system.

Let's get started,

Advantages of Real Time Operating System

1. Less Downtime

Al while keeping all devices in active state, a RTOS makes sure that the system consumes more resources. As a result, a system using RTOS experiences very less downtime. And also, hosting companies too exhibit maximum results while using RTOS.

2. Task Management

A real time operating system typically takes less amount of time to shift from one task to another. Usually it takes 3 microseconds or less to shift tasks. This type of faster task management ensures critical processes can be achieved on time.

3. Efficiency

A real time operating system focusses on one application at a given time. Most often this application will be the one which is already running. All others on queue will be kept in waiting stage. Thus, the critical tasks can be processed on time within the given deadline for achieving the exact results needed. 

4. Availability

Due to the fact that a RTOS exhibits maximum results, it is a system which is available 24/7. Hence, it is best suited for applications that needs to perform always. Besides that, a RTOS system is capable of supporting different MCU platforms.

5. Reliability

Real time operating systems, especially those which are of hard RTOS are completely free of errors. It ensures a better way of handling errors. Moreover, operating systems experience an issue known as jitter in which the amount of errors between subsequent loop is measured. If programmed correctly, a RTOS can be optimized in a way that it undergoes less amount of jitters. 

Disadvantages of Real Time Operating System

1. Multitasking

Although a RTOS is capable of concentrating on targeted applications, that is not the same with multitasking. They are designed to run only few of the tasks. Therefore, it is not recommended for systems that require multitasking.

2. Complexity

Complex algorithms are behind a RTOS interface. It will be difficult for a normal user to write these algorithms. Only an expert developer will be able to write and understand them.

3. Task Focus

As mentioned earlier, a RTOS focusses on one application at a given time. This is mainly done to maintain accuracy and reduce errors. All other applications those are of low priority needs to be on waiting. There is no time limit in how much time they will be on stand by.

4. Program Crashes

Program crashes can be frequently experienced while using a real time operating system. Unlike a regular O/S, a RTOS cannot efficiently separate memory domains. As a result, processes will have a problem addressing them.

5. Driver Requirement

A real time operating system constantly experiences signal interruptions. Therefore, for achieving steady speed, the required drivers must be installed on the computer. Whenever an interruption occurs, a RTOS will be able to respond quickly with the help of drivers.