Modern operating system note 2 threads

Implementation of the threading mechanism:
1 User-level threads

User space Create line libraries, kernel management or process, no knowledge of thread switching, kernel State not required for thread core

Pros: Toggle fast, removable values

Disadvantage: The kernel allocates only CPUs to the process, so two threads in a process cannot run on two processors at the same time

System calls are process-based, so all threads in the process are also blocked

2 Core-level threads

The kernel manages all processes, threads, and the typical implementation thread is Windows

3 Mixing

Thread creation in user space

Thread scheduling and the nuclear mentality space

Modern operating system note 2 threads