Process Management

This section explores the fundamental concepts of process management within modern operating systems, covering the lifecycle of processes, CPU scheduling mechanisms, and the evolution of threads.

Processes Concepts - The Essence Of Execution

This section defines processes in operating systems, distinguishing them from programs, and outlines their lifecycle, states, and the Process Control Block (PCB).

Process Vs. Program: The Static Blueprint Vs. The Dynamic Act

This section distinguishes between programs as static entities and processes as dynamic entities in operating systems, highlighting their differences in execution and state.

Process States: A Life Cycle Journey

This section outlines the various states through which a process transitions during its lifecycle in an operating system.

Process Control Block (Pcb): The Process's Identity Card

The Process Control Block (PCB) is a vital data structure in operating systems that stores all information necessary for managing a specific process.

Process Scheduling - Orchestrating Cpu Allocation

Process scheduling is a crucial function of operating systems that determines how processes access the CPU, maximizing efficiency and fairness.

Scheduling Queues: Organizing The Waiting Line

This section discusses the various scheduling queues used in operating systems for managing process states.

Schedulers: The Decision-Makers

Schedulers are vital components of an operating system that manage which processes get access to the CPU and when.

Context Switching: The Art Of Multitasking

This section covers context switching, the mechanism that enables a CPU to handle multiple processes simultaneously, enhancing multitasking in operating systems.

Scheduling Algorithms - Strategies For Cpu Allocation

This section provides an overview of scheduling algorithms used by operating systems to manage CPU allocation, discussing core methodologies and their advantages and disadvantages.

First-Come, First-Served (Fcfs) Scheduling

FCFS scheduling is a straightforward scheduling algorithm that serves processes in the order of their arrival in the ready queue.

Shortest-Job-First (Sjf) Scheduling

Shortest-Job-First (SJF) Scheduling is an algorithm that assigns the CPU to the process with the smallest estimated next CPU burst, optimizing for minimal average waiting time in process scheduling.

Priority Scheduling

Priority scheduling allocates CPU resources based on assigned priority levels for each process.

Round-Robin (Rr) Scheduling

Round-Robin scheduling is a CPU scheduling algorithm designed for time-sharing systems that allocates CPU time slices to each process in a cyclic manner.

Multi-Level Queue Scheduling

Multi-level queue scheduling allows the operating system to manage processes in distinct queues, optimizing CPU usage based on process characteristics.

Multi-Level Feedback Queue Scheduling (Mlfq)

Multi-level Feedback Queue Scheduling (MLFQ) is a sophisticated CPU scheduling algorithm that dynamically adjusts the priorities of processes based on their CPU burst behavior.

Threads - Lightweight Concurrency

This section covers the concept of threads as lightweight units of concurrency within modern operating systems.

Benefits Of Threads

Threads provide significant advantages over traditional processes by enhancing responsiveness, resource sharing, and computational efficiency.

User Threads Vs. Kernel Threads

This section explores the distinction between user threads and kernel threads in operating system design, detailing their management, scheduling characteristics, advantages, and disadvantages.

Multithreading Models

The multithreading models define the relationships between user and kernel threads, illustrating various ways to implement threads in operating systems.

Thread Libraries

Thread libraries provide APIs for creating and managing threads within applications, enhancing concurrency and performance.