Operating System Concepts

Operating System: It is a system software to manage computer system resources, control program execution, improve human-machine interface, provide various services, reasonably organize computer work flow and provide good running environment for users to use computer effectively.

operating system features:

1. Concurrency

2. Sharing

3. Virtual Sex

4. Uncertainties

operating system basic features :

1. File Management

2. Process Management

3. Memory Management

4. Device Management

5. Job Management

design goals for the operating system :

1. User-friendly use of computer

2. Increase utilization of system resources

3. Improve system efficiency

4. Enlarge machine function

5. Building an open environment

Real-time operating system : refers to the acceptance of external events or data and response and processing at a fast enough speed, and the results of processing can be within a specified time to control the monitoring of the production process or to respond quickly to the processing system, and control all real-time tasks coordinated operation of the operating system.

Real-time system : used as a control device, it can respond to the random occurrence of external events in a timely manner, and complete the processing of events within a strict time frame, the main feature is timeliness, one is high reliability. Real-time system is divided into real-time control system and real-time information processing system.