Process State

Posted on January 19, 2023

Each process is in a state and can transition from its current state to a new state. This is helpful for scheduling (see CPU Virtualisation) - a Ready process can be scheduled while another is Blocked, for example.

Common states include:

• Running
• Ready
• Blocked

Common state transitions include:

• Ready -> Running: Schedule
• Running -> Ready: Deschedule
• Running -> Blocked: Initiate IO
• Blocked -> Ready: Finish IO

Tags: programming ostep