DIZNR INTERNATIONAL

Day 01Part 18- Operating system- Process State Diagram new ready running waiting and termination

Day 01Part 18- Operating system- Process State Diagram new ready running waiting and termination

https://www.gyanodhan.com/video/7B7.%20GATE%20CSEIT/Operating%20System/424.%20Day%2001Part%2018-%20Operating%20system-%20Process%20State%20Diagram%20new%20ready%20running%20waiting%20and%20termination.mp4

In operating systems, a process state diagram illustrates the various stages a process undergoes during its lifecycle. Understanding these states is crucial for grasping how an operating system manages and schedules processes.

Primary Process States:

  1. New: The process is being created.

  2. Ready: The process is prepared to run and is waiting for CPU allocation.

  3. Running: The process is currently executing instructions on the CPU.

  4. Waiting (Blocked): The process cannot proceed until a specific event occurs (e.g., I/O completion).

  5. Terminated: The process has finished execution and is awaiting removal from memory.

Process State Transitions:

These states and transitions enable the operating system to manage multiple processes efficiently, ensuring optimal resource utilization and system performance.

For a visual representation and more details, consider this resource:

Day 01Part 18- Operating system- Process State Diagram new ready running waiting and termination

OPERATING SYSTEM Lecture Notes On

Operating System

Here’s a clear and simple explanation for:


Day 01 – Part 18: Operating System – Process State Diagram

Understanding Process States: Ready, Running, Waiting, Termination


What is a Process?

A process is a program in execution.
The Operating System (OS) manages processes using a Process State Diagram.


Process State Diagram Overview

The 5 Main States of a Process:

  1. New

    • Process is being created

    • Memory is allocated

    • Not yet ready to run

  2. Ready

    • Process is loaded into main memory

    • Waiting for CPU to be assigned

    • In queue with other ready processes

  3. Running

    • CPU is executing this process

    • Only one process runs on a core at a time

  4. Waiting / Blocked

    • Process is waiting for some I/O operation or event

    • CPU is not used during this time

  5. Terminated / Exit

    • Process has finished execution or been forcibly stopped

    • OS releases all resources


State Diagram (Visual)

sql
+---------+
| New |
+---------+
|
v
+---------+
| Ready |<-------------+
+---------+ |
| |
v |
+---------+ |
| Running |-------------+
+---------+ (Preempted by OS)
| |
| v
| +---------+
| | Waiting |
| +---------+
| |
+-------+
(I/O complete)
|
v
+---------+
| Terminate |
+---------+

Transitions between States:

From To Reason
New → Ready Process created, memory allocated
Ready → Running CPU is assigned by scheduler
Running → Waiting Process requests I/O
Waiting → Ready I/O completed
Running → Ready Interrupted (time slice over)
Running → Terminated Execution completed or killed

Key Concepts:


Real-Life Analogy:

Think of it like people waiting in line at a bank:


Let me know if you want this as:

I’m happy to help further!

Day 01Part 18- Operating system- Process State Diagram new ready running waiting and termination