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Operating System Articles
Page 31 of 171
Difference between Process and Thread
Both process and thread are fundamental concepts in operating systems that represent independent sequences of execution. The key difference is that processes operate in separate memory spaces, while threads share the same memory space within a process. Understanding the distinction between processes and threads is crucial for system design, performance optimization, and concurrent programming. Let's explore these concepts in detail. What is a Process? A process is an active program in execution − more than just program code. It includes the program counter, process stack, registers, and program code. When a program is executed, the operating system ...
Read MoreProcess vs Parent Process vs Child Process
In Operating System, the fork() system call is used by a process to create another process. The process that uses the fork() system call is the parent process and the process consequently created is known as the child process. Process A process is an active program — a program that is under execution. It is more than just the program code as it includes the program counter, process stack, registers, program code, and other runtime information. The program code itself is only the text section of a process. A process changes its state as it executes, depending ...
Read MoreProcess Scheduling Fundamentals
Process Scheduling handles the selection of a process for the processor based on a scheduling algorithm and the removal of a process from the processor. It is an important part of multiprogramming in operating systems, enabling efficient CPU utilization and fair resource distribution among competing processes. Process Scheduling Algorithms Process scheduling algorithms determine which process gets CPU access next and how resources are distributed among processes. Each algorithm has different characteristics regarding fairness, throughput, and response time. Major Scheduling Algorithms First Come First Served (FCFS) − Handles processes in the order they arrive in the ...
Read MoreHow to Merge PDF Files in Bash?
Merging PDF files in Linux is a common task for organizing documents, reducing clutter, or preparing files for sharing. Linux provides several powerful command-line utilities specifically designed for this purpose. Each tool offers different features and syntax, making them suitable for various use cases. Available PDF Merging Tools Linux offers multiple utilities for merging PDF files − pdfunite − Part of Poppler Utils, simple and fast pdftk − PDF Toolkit with advanced features qpdf − Powerful PDF transformation utility gs (Ghostscript) − PostScript and PDF processor convert (ImageMagick) − Image manipulation tool with PDF support ...
Read MoreSingle-threaded and Multi-threaded Processes
Single-threaded processes execute instructions sequentially, processing one command at a time in a linear fashion. In contrast, multi-threaded processes allow multiple parts of a program to execute concurrently, creating lightweight execution units called threads within the same process space. Types of Threading Implementation Multi-threaded processes can be implemented at two levels − user-level threads managed by application libraries, or kernel-level threads managed directly by the operating system. Multi-threaded Process Implementation User-Level Threads User Thread ...
Read MoreOperating Systems Client/Server Communication
Client/Server communication is a distributed computing model where multiple client processes request services from a server process. The clients send requests to the server, and the server responds with the requested data or services. This architecture forms the backbone of modern networked applications and distributed systems. There are three main methods for client/server communication, each with distinct characteristics and use cases − Sockets Sockets are endpoints for communication between two processes, whether on the same machine or across a network. A socket is identified by an IP address and port number combination. They provide a low-level interface ...
Read MoreDining Philosophers Problem (DPP)
The Dining Philosophers Problem (DPP) is a classic synchronization problem in computer science that illustrates the challenges of deadlock and resource sharing in concurrent systems. The problem states that there are 5 philosophers sharing a circular table where they eat and think alternatively. There is a bowl of rice for each philosopher and 5 chopsticks placed between them. A philosopher needs both their right and left chopstick to eat. A hungry philosopher may only eat if both chopsticks are available, otherwise they put down any chopstick they hold and begin thinking again. This problem demonstrates a large class of ...
Read MoreWhat are some great features of Windows 10?
Windows 10 is a Personal Computer Operating System developed and released by Microsoft on July 29, 2015. It introduced significant improvements and new features when compared to its predecessor Windows 8, addressing user feedback and modernizing the desktop experience. The Start Menu Windows 10 Start Menu Recent Apps Microsoft Word File Explorer Chrome All Apps Calculator Camera Settings ...
Read MoreWhat is Multicore Programming?
Multicore programming is a software development approach that creates concurrent systems designed to run efficiently on multicore processors and multiprocessor systems. It leverages multiple processing units to execute tasks simultaneously, improving system performance and responsiveness. Multicore vs Multiprocessor Systems A multicore processor system contains a single processor chip with multiple execution cores, while a multiprocessor system has multiple separate processors on the motherboard or chip. Both architectures can also include specialized components like Field-Programmable Gate Arrays (FPGAs) — integrated circuits with programmable logic blocks and reconfigurable interconnects that process input data to produce outputs. ...
Read MoreProcess Representation in Linux System
Linux manages processes using a fundamental data structure called task_struct, which contains all the information needed to represent a process in the system. This structure is defined in the header file within the kernel source code. Process Data Structure The task_struct is a comprehensive C structure that holds critical information about each process, including: Process state − Current execution state (running, waiting, stopped) Scheduling information − Priority, time slices, and scheduler-specific data Memory management − Virtual memory layout and page tables File descriptors − List of open files and I/O resources Process relationships − Parent, ...
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