(1) role of the process control block-the process has a unique entity;
Because the process control block records the existence and characteristics of the process, the PCB and the process are born to death. When a process is created to establish a PCB for it, the process is revoked, the system will be subject to its PCB. The OS controls the process according to the PCB. The process management is also implemented through the PCB management; therefore, a process control block is a unique entity of a process. (2) PCB information: process identifier: Used to uniquely identify a process. It has an external identifier (consisting of letters ); the second is composed of arrays; (3) process scheduling information: it includes Process status (running, ready, blocked), queue (ready, blocking Queue), queue pointer, scheduling parameters: process Priority, process execution time and waiting time; (4) processor status information: it consists of various registers (General registers, execution counters, ProgramStatus psw, user Stack pointer, etc.). This type of information enables the process to resume running from the breakpoint after being re-executed by the process. (5) Process Control Information (6) Family Information
