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What is a thread in linux? In view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

Definition of thread

From the user's point of view: a process is a running program. Operating system point of view: the operating system runs a program, which needs to describe the running process of the program. This description is described by a structure task_struct {}, collectively known as PCB, so for the operating system, the process is the PCB (process control block) program control block. The process description information includes: identifier PID, process status, priority, program counter, context data, memory pointer, IO status information. Bookkeeping information. All need the operating system for scheduling.

Multitasking Environment of Linux

When an instruction is executed under Linux, the system will load the relevant permissions, attributes, program code and data into memory, and give the unit a process identifier (PID). Finally, the task that the instruction can perform is related to the authority of the PID.

There are many different accounts on the Linux system, each with its own special permissions, and only one person has the supreme power, that is, root (system administrator). Except for root, everyone else must be subject to some restrictions! The environment setting for everyone to enter Linux can be set according to everyone's preference.

Our Linux allows CPU to switch between workplaces, that is, each job takes up only a few instructions of CPU, so CPU can switch between processes every second!

The work of the CPU switching process, and the scheduling of these tasks into the CPU operation will affect the overall performance of the system! The multitasking behavior currently used by Linux is a great mechanism that can almost squeeze out the performance of PC! Because the performance is very good, when many people log on to the system at the same time, they will feel as if the whole host exists for you! This is a multi-person and multi-tasking environment.

In Linux, six text login windows and a graphical interface are provided by default, and you can use [Alt] + [F1]. [F7] to switch between different terminal interfaces.

After we log in to bash, we get a PID named bash, and almost all the other instructions executed in this environment are so-called child processes.

The answer to the question about what the thread in linux refers to is shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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