The basic tasks of a computer operating system are: 1. Control and manage the behavior of the system, such as identifying input from the keyboard, sending output results to the monitor, managing files and folders on storage devices, etc.; 2. Allocate and allocate system resources. The operating system is responsible for determining which computer resources a program requires and scheduling and allocating these resources to run the program. 3. Scheduling operations. The operating system is responsible for scheduling various behaviors of the program to make full use of system resources.
The operating environment of this tutorial: Windows 10 system, DELL G3 computer.
The operating system (OS) is the most important program running on the computer. The operating system manages and controls the computer's actions.
For example: Windows, Mac OS, Linux······
The main tasks of the operating system:
1. Control and management system Behavior
The operating system performs basic tasks such as: recognizing input from the keyboard, sending output to the monitor, managing files and folders on storage devices, and controlling box disk drives. and external devices such as printers. The operating system must also ensure that different programs and different users working with colleagues do not interfere with each other. In addition, it is responsible for security issues and ensuring that unauthorized users and programs cannot access the system.
2. Scheduling and allocating system resources
The operating system is responsible for determining which computer resources a program requires (such as: CPU time, memory space, disks, input and output devices) and schedule and allocate these resources to run the program.
3. Scheduling operations
The operating system is responsible for scheduling various behaviors of the program to make full use of system resources. Many programs now support multi-programming, multi-threading, and multi-processing to improve system performance.
Multiple programming allows multiple programs to share a CPU and run simultaneously. The CPU is faster than other components of the computer. This results in the CPU being idle most of the time - for example, while waiting for data to be transferred from disk or for other system resources to respond. Multiprogramming operating systems take advantage of this situation by allowing multiple programs to use the CPU's idle time. For example: multi-threading design allows you to use sub-processors to edit files while your web browser can also download files
Multi-threading allows a single program to perform multiple tasks at the same time.
For example: a subhandler allows the user to edit text and store it to disk at the same time. In this example, editing and saving are two tasks in the same application, and the two tasks may be running simultaneously.
(Or: each carriage of the train, and the process is the train. The carriage cannot move without leaving the train. Similarly, the train cannot have only one carriage.)
More Processes, or parallel processing, use two or more processors to complete multiple subtasks that occur simultaneously, and then combine the solutions of these subtasks to obtain a solution to the entire task.
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