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This article mainly introduces what is the process, thread and cooperative program in the operating system, which has a certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let's take a look at it.

Process: in essence, it is an independent program. Process is the basic concept of resource allocation and scheduling in the operating system, and an independent unit for resource allocation and scheduling in the operating system.

Thread: the smallest unit that the operating system can schedule operations. It is included in the process and is the actual operating unit of the process. Multiple threads can be concurrent in a process, each thread performs different tasks, and switching is controlled by the system.

Co-program: also known as micro-thread, is a kind of lightweight thread in user mode, unlike threads and processes that need to switch context on the system kernel, the context switch of co-program is determined by the user and has its own context. so it is said that lightweight threads, also known as user-level threads are called co-programs, a thread can have multiple co-programs, and thread processes are synchronization mechanisms. On the other hand, the cooperative program is not implemented in the native syntax of asynchronous Java, and is currently supported by languages such as python, Lua and GO.

Relationship: a process can have multiple threads, which allows a computer to run two or more programs at the same time. A thread is the minimum execution unit of a process, CPU

Scheduling switches between processes and threads. When there are more processes and threads, scheduling consumes a lot of real threads running on CPU,CPU, and threads can

To correspond to multiple collaborations.

What are the advantages and disadvantages of co-programming for multithreading?

Advantages:

Very fast context switching, without the context switch of the system kernel, reducing the overhead.

High concurrency can be achieved with a single thread, and a single-core CPU can support tens of thousands of cooperative programs.

Since there is only one thread and there is no conflict between writing variables at the same time, there is no need to lock the shared resources in the collaboration program.

Disadvantages:

The cooperative program cannot make use of multi-core resources and is essentially a single thread.

The collaborator needs to work with the process to run on multiple CPU.

At present, java does not have a mature third-party library, so there are risks.

It is difficult to debug debug, which is not conducive to finding problems.

Thank you for reading this article carefully. I hope the article "what are processes, threads and collaborations in the operating system" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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