July 21st, 2016 by
Technology undoubtedly has completely changed our lives and the world around us, and its progression reaches more advanced levels by the day. Today we have a special-purpose operating system that is used to fulfill unvarying time requirements of a processor executing the flow of data; this operating system is known as Real-Time Operating System (RTOS).
This real-time software operating system is typically used as a controlling mechanism in the dedicated systems such as-automation control systems, medical imaging systems, home-appliance controllers, weapon systems and scientific experiments, etc., In these applications the processing is done within a defined time constraint, otherwise the system will fail. If a system returns the accurate result within a specified time, only then is the system considered correct and errorless.
Classification of real-time operating systems:
Here time constraints are not rigid and can be skipped or delayed to a certain extent. The soft real-time operating system is used in devices such as mobile phones and digital cameras.
Here time constraints are certain and invariable, it is used in such devices where deadlines are restricted within a certain period of time. For example: engine control systems and air-bag controls in a car.
Here some of the time constraints are not restricted and that can lead to unexpected results. A Firm real-time operating system is sometimes used to inspect and test defects in manufacturing. For example: automated visual inspection in industrial automation
How RTOS is different from General Purpose Operating Systems
The general purpose operating systems are used to perform multiple tasks simultaneously but these operating systems are not suitable for synchronizations and real-time constraints. For synchronization and real-time needs an RTOS comes into the picture, deals with real-time constraints and makes efficient use of memory. The real-time system is also used in embedded systems where real-time constraints are required to provide a correct result within a specific time period without any delay.
The differences are:
- The real time systems have preemptive scheduling technique, general purpose systems work with non preemptive scheduling policy.
- Inter task communication process is present in real-time operating systems, which is not possible in general purpose operating systems.
- Priority inversion is done in real-time system but not in general purpose systems.
- Mathematical equations are possible to define for real-time systems but not possible to define for general operating systems.
Hence, real-time operating systems are time critical where tasks are bound to be performed within a specific and predicted time period without any latency. For more information on PC-Based RTOS, you can browse the internet and find some excellent IT companies providing latest technologies and computer systems.