• It is a data structure that contains all relevant information about a process.
• Each process has one unique PCB.
• It is also termed as Process Descriptor (Pd).
• To execute a process, the OS will create a data structure that contains all the information about a process called PCB. It is also being termed as a context of a process.

Some of the important fields present in the process control block are:

• PID
• States
• Scheduling Parameter
• Program Counter
• CPU registers
• Pointer to the other PCB
• List of open files
• List of open devices like keyboard, mouse

All these PCB’s are present in one master Process Control block.

Diag-1: Process Control Block(PCB)

Related Posts:

• Process vs program
• Sections of a process
• States of a process
• Attributes of a process
• Context switching
• Termination of a process

Categories: Operating system (OS)