• Engineering Mathematics
  • Discrete Mathematics
  • Operating System
  • Computer Networks
  • Digital Logic and Design
  • C Programming
  • Data Structures
  • Theory of Computation
  • Compiler Design
  • Computer Org and Architecture

Operating System Tutorial

  • What is an Operating System?
  • Functions of Operating System
  • Types of Operating Systems
  • Need and Functions of Operating Systems
  • Commonly Used Operating System

Structure of Operating System

  • Operating System Services
  • Introduction of System Call
  • System Programs in Operating System
  • Operating Systems Structures
  • History of Operating System
  • Booting and Dual Booting of Operating System

Types of OS

  • Batch Processing Operating System
  • Multiprogramming in Operating System
  • Time Sharing Operating System
  • What is a Network Operating System?
  • Real Time Operating System (RTOS)

Process Management

  • Introduction of Process Management
  • Process Table and Process Control Block (PCB)
  • Operations on Processes
  • Process Schedulers in Operating System
  • Inter Process Communication (IPC)
  • Context Switching in Operating System
  • Preemptive and Non-Preemptive Scheduling

CPU Scheduling in OS

  • CPU Scheduling in Operating Systems
  • CPU Scheduling Criteria
  • Multiple-Processor Scheduling in Operating System
  • Thread Scheduling

Threads in OS

  • Thread in Operating System
  • Threads and its types in Operating System
  • Multithreading in Operating System
  • Process Synchronization
  • Introduction of Process Synchronization
  • Race Condition Vulnerability
  • Critical Section in Synchronization
  • Mutual Exclusion in Synchronization

Critical Section Problem Solution

  • Peterson's Algorithm in Process Synchronization
  • Semaphores in Process Synchronization
  • Semaphores and its types
  • Producer Consumer Problem using Semaphores | Set 1
  • Readers-Writers Problem | Set 1 (Introduction and Readers Preference Solution)
  • Dining Philosopher Problem Using Semaphores
  • Hardware Synchronization Algorithms : Unlock and Lock, Test and Set, Swap

Deadlocks & Deadlock Handling Methods

  • Introduction of Deadlock in Operating System
  • Conditions for Deadlock in Operating System
  • Banker's Algorithm in Operating System
  • Wait For Graph Deadlock Detection in Distributed System
  • Handling Deadlocks
  • Deadlock Prevention And Avoidance
  • Deadlock Detection And Recovery
  • Deadlock Ignorance in Operating System
  • Recovery from Deadlock in Operating System
  • Memory Management
  • Memory Management in Operating System
  • Implementation of Contiguous Memory Management Techniques
  • Non-Contiguous Allocation in Operating System
  • Compaction in Operating System
  • Best-Fit Allocation in Operating System
  • Worst-Fit Allocation in Operating Systems
  • First-Fit Allocation in Operating Systems
  • Fixed (or static) Partitioning in Operating System
  • Variable (or Dynamic) Partitioning in Operating System
  • Paging in Operating System
  • Segmentation in Operating System
  • Virtual Memory in Operating System
  • Page Replacement Algorithms
  • Page Replacement Algorithms in Operating Systems
  • Program for Page Replacement Algorithms | Set 2 (FIFO)
  • Belady's Anomaly in Page Replacement Algorithms
  • Optimal Page Replacement Algorithm
  • Program for Least Recently Used (LRU) Page Replacement algorithm
  • Techniques to handle Thrashing
  • Storage Management
  • File Systems in Operating System
  • File Allocation Methods
  • Free space management in Operating System
  • Disk Scheduling Algorithms
  • RAID (Redundant Arrays of Independent Disks)

OS Interview Questions

  • Last Minute Notes – Operating Systems
  • Operating System Interview Questions

OS Quiz and GATE PYQ's

  • OS Process Management
  • OS Memory Management
  • OS Input Output Systems
  • OS CPU Scheduling
  • 50 Operating System MCQs with Answers

An Operating System(OS) is software that manages and handles the hardware and software resources of a computer system. It provides interaction between users of computers and computer hardware. An operating system is responsible for managing and controlling all the activities and sharing of computer resources. An operating system is a low-level Software that includes all the basic functions like processor management, memory management, Error detection, etc.

This Operating System tutorial will cover all the basic to advance operating system concepts like System Structure, CPU Scheduling, Deadlock, file and disk management, and many more.

Recent Articles on Operating Systems

  • System Structure
  • CPU Scheduling
  • Processes & Threads
  • File and Disk Management
  • Introduction of Operating System
  • Real time systems
  • Tasks in Real Time systems
  • Difference between multitasking, multithreading and multiprocessing
  • Types of computer memory (RAM and ROM)
  • Difference between 32-bit and 64-bit operating systems
  • What happens when we turn on computer?
  • UEFI(Unified Extensible Firmware Interface) and how is it different from BIOS

System Structure :

  • Microkernel
  • Kernel I/O Subsystem (I/O System)
  • Monolithic Kernel and key differences from Microkernel
  • Get/Set process resource limits in C
  • Privileged and Non-Privileged Instructions

CPU Scheduling :

  • Process | (Introduction and different states)
  • States of a process
  • Process Scheduler
  • Measure the time spent in context switch?
  • Difference between dispatcher and scheduler
  • FCFS Scheduling | Set 1
  • FCFS Scheduling | Set 2
  • Convoy Effect in Operating Systems
  • Shortest Job First (or SJF) scheduling | Set 1 (Non- preemptive)
  • Program for Shortest Job First (SJF) scheduling | Set 2 (Preemptive)
  • Shortest Job First scheduling with predicted burst time
  • Longest Remaining Time First (LRTF) Program
  • Longest Remaining Time First (LRTF) algorithm
  • Round Robin scheduling
  • Selfish Round Robin Scheduling
  • Round Robin Scheduling with different arrival times
  • Priority Scheduling
  • Program for Preemptive Priority CPU Scheduling
  • Priority Scheduling with different arrival time – Set 2
  • Starvation and Aging in Operating Systems</a
  • Highest Response Ratio Next (HRRN) Scheduling
  • Multilevel Queue Scheduling
  • Multilevel Feedback Queue Scheduling
  • Lottery Process Scheduling
  • Multiple-Processor Scheduling

Process Synchronization :

  • Process Synchronization | Introduction
  • Process Synchronization | Set 2
  • Critical Section
  • Inter Process Communication
  • Interprocess Communication: Methods
  • IPC through shared memory
  • IPC using Message Queues
  • Message based Communication in IPC (inter process communication)
  • Communication between two process using signals in C
  • Semaphores in operating system
  • Mutex vs. Semaphore
  • Process Synchronization | Monitors
  • Peterson’s Algorithm for Mutual Exclusion | Set 1 (Basic C implementation)
  • Peterson’s Algorithm for Mutual Exclusion | Set 2 (CPU Cycles and Memory Fence)
  • Peterson’s Algorithm (Using processes and shared memory)
  • Dekker’s algorithm
  • Bakery Algorithm
  • Dining-Philosophers Solution Using Monitors
  • Reader-Writers solution using Monitors
  • Lock variable synchronization mechanism
  • Mutex lock for Linux Thread Synchronization
  • Priority Inversion : What the heck !
  • What’s difference between Priority Inversion and Priority Inheritance ?
  • Deadlock Introduction
  • Deadlock, Starvation, and Livelock
  • Banker’s Algorithm
  • Resource Allocation Graph (RAG)
  • Program for Banker’s Algorithm
  • Banker’s Algorithm : Print all the safe state (or safe sequences)
  • Deadlock detection algorithm

Processes & Threads :

  • Operating System | Thread
  • Threads and its types
  • Operating System | User Level thread Vs Kernel Level thread
  • Process-based and Thread-based Multitasking
  • Multi threading models
  • Benefits of Multithreading
  • Zombie Processes and their Prevention
  • Maximum number of Zombie process a system can handle
  • Operating System | Remote Procedure call (RPC)

Memory Management :

  • Memory Hierarchy Design and its Characteristics
  • Introduction to memory and memory units
  • Different Types of RAM (Random Access Memory)
  • Buddy System: Memory allocation technique
  • Memory Management | Partition Allocation Method
  • Variable (or dynamic) Partitioning in Operating System
  • Requirements of memory management system
  • Memory management – mapping virtual address to physical addresses
  • Page Table Entries
  • Virtual Memory
  • Memory Interleaving
  • Virtual Memory Questions
  • Inverted Page Table
  • Page Fault Handling
  • Segmentation
  • Memory Segmentation in 8086 Microprocessor
  • Program for Next Fit algorithm in Memory Management
  • Overlays in Memory Management
  • Program for Page Replacement Algorithms | Set 1 ( LRU)
  • Program for Optimal Page Replacement Algorithm
  • LFU (Least Frequently Used) Cache Implementation
  • Second Chance (or Clock) Page Replacement Policy
  • Allocating kernel memory (buddy system and slab system)
  • Program for buddy memory allocation scheme in Operating Systems | Set 1 (Allocation)
  • Program for buddy memory allocation scheme in Operating Systems | Set 2 (Deallocation)
  • Static and Dynamic Libraries | Set 1
  • Working with Shared Libraries | Set 1
  • Working with Shared Libraries | Set 2
  • Named Pipe or FIFO with example C program
  • Tracing memory usage in Linux

Disk Management

  • File Systems
  • Unix File System
  • File Directory | Path Name
  • Structures of Directory
  • File Access Methods
  • Secondary memory
  • Secondary memory – Hard disk drive
  • Free space management
  • Important Linux Commands (leave, diff, cal, ncal, locate and ln)
  • Introduction to Linux Shell and Shell Scripting
  • ‘crontab’ in Linux with Examples
  • indepth and maxdepth in Linux find() command for limiting search to a specific directory.

Types of Operating System

  • Batch OS (e.g. Transactions Process, Payroll System, etc.)
  • Multi-programmed OS(e.g. Windows, UNIX, macOS, etc.)
  • Timesharing OS(e.g. Multics, Linux, etc.)
  • Real-Time OS(e.g. PSOS, VRTX, etc.)
  • Distributed OS(e.g. LOCUS, Solaris, etc.)

Operating System Functions

  • Memory and processor Management
  • Network Management
  • Security Management
  • File Management
  • Error Detection
  • Job Accounting

FAQs on Operating System

Q.1 why learn operating systems.

OS is the most important part of a computer. Through OS users can interact with computer software. It provides an interface between Hardware and CPU. It also provides a platform for the program to run on it and services to users. It performs all the basic tasks required in an application.

Q.2 Write the top 10 Operating System Examples?

Some most popular OS examples are given below: Windows Linux MacOS Ios Android Ubuntu CentOS Solaris Chrome OS Fedora

Q.3 What are the Advantages of a multiprocessor system?

A multiprocessor system involves the processing of two or more computer programs simultaneously that share the same memory area. It increases reliability.

Q.4 What is a thread in OS?

A thread is a lightweight process or subprogram which is part of the process or a program. A thread has its own Registers, Stack, State, and Program counter.

Quick Links :

  • Last Minute Notes (LMNs) | Operating Systems
  • Commonly Asked Operating Systems Interview Questions
  • Gate Practice Questions
  • ‘Quizzes’ on Operating Systems !
  • ‘Practice Problems’ on Operating Systems !

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Introduction to Operating Systems

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Introduction

1. introduction #.

This part of the book gives an overview of everything you will learn in more detail in the rest of the book. We start by discussing the purpose of operating systems today, why it is so valuable to understand them, and some of the reasons we expect operating systems to continue to evolve rapidly in coming years. The next chapter describes the fundamental structure of today’s monolithic operating systems, and how applications and devices interact with the OS. We then discuss some of the core abstractions of operating systems and of Unix/Linux in particular. The final chapter on tools reviews the fundamental tools that we expect you to master on using Unix to develop system software.

Open Educational Resource (OER) presentations for a course on Operating Systems

1. what is this.

This page collects OER presentations (HTML slides with embedded audio and PDF variants, available under free and open Creative Commons licenses ) for a course on Operating Systems (following the book Operating Systems and Middleware: Supporting Controlled Interaction by Max Hailperin) as part of the module Computer Structures and Operating Systems for 4th-term students in the Bachelor program in Information Systems at the University of Münster, Germany . Some background concerning the origin of this project and the adopted teaching and learning strategy Just-in-Time Teaching (JiTT; see here for the Wikipedia entry ) is explained in its README .

If you are teaching or learning Operating Systems (OSs), feel free to use, share, and adapt my presentations. As usual for projects on GitLab, you can open issues to report bugs or suggest improvements, ideally with merge requests . The document CONTRIBUTING contains some pointers for contributors.

Students in Münster have taken courses on programming in Java, data structures and algorithms, and data modeling before taking “Computer Structures and Operating Systems.” As prerequisite for Operating Systems, students should

  • be able to write, compile, and execute small Java programs,
  • be able to use basic data structures (stack, queue, tree) and algorithms (in particular, hashing);
  • also, being able to explain the database transaction concept and update anomalies will ease understanding of presentations on mutual exclusion.

Learning objectives : After taking this course, students will be able

  • to discuss major architectures and components of modern OSs; to explain and contrast processes and threads and their roles for OSs and applications,
  • to explain OS data structures, algorithms, and management techniques,
  • to analyze programming challenges arising from concurrency and to apply appropriate techniques addressing these challenges,
  • to discuss the notion of IT security and to apply security mechanisms provided by the operating system in support of secure IT systems.

2. Presentations

Note : OER presentations (HTML slides and PDF documents) linked here are generated automatically from their source files (with the FLOSS software emacs-reveal ). Presentations and source files are published under the Creative Commons license CC BY-SA 4.0 . Files are updated throughout the term (and thereafter). The PDF versions below come in two variants: the first one mirrors the presentation layout on screen, while the second one provides a condensed format, generated via LaTeX from Org source files.

WARNING! Presentations below will be updated for use in 2023 during the term. Presentations are “ready” if a link in Learnweb exists.

  • List of index terms for Operating Systems (may simplify search for specific topics).
  • OS Motivation ( PDF , condensed PDF )
  • OS Overview ( PDF , condensed PDF )
  • OS Introduction ( PDF , condensed PDF )
  • Interrupts ( PDF , condensed PDF )
  • Threads ( PDF , condensed PDF )
  • Scheduling ( PDF , condensed PDF )
  • Mutual Exclusion (MX) ( PDF , condensed PDF )
  • MX in Java ( PDF , condensed PDF )
  • MX Challenges ( PDF , condensed PDF )
  • Virtual Memory I ( PDF , condensed PDF )
  • Virtual Memory with Linux ( PDF , condensed PDF )
  • Virtual Memory II ( PDF , condensed PDF )
  • Processes ( PDF , condensed PDF )
  • Security ( PDF , condensed PDF )
  • 2020: JiTT for OS
  • 2022: Learning and Teaching

For offline work (also on mobile devices), you can download the results of the latest pipeline execution on GitLab or clone the source repository including all necessary resources and generate presentations yourself.

3. Source code and licenses

In the spirit of Open Educational Resources (OER), source files, necessary software, and presentations are published in this GitLab repository under free licenses . All OER presentations are created from plain text files in a simple text format called Org Mode (a lightweight markup language ), focusing on content, while layout is defined separately. Importantly, the separation of content and layout simplifies collaboration across organizational boundaries, and the use of a simple text format enables comparisons of adapted or enhanced versions (with diff -like functionality).

Using the free software emacs-reveal these text files are translated into reveal.js HTML presentations, which can be viewed on (almost) any device with a Web browser. In times of dragnet surveillance and surreptitious as well as blatant data brokerage I recommend the Firefox variant Tor Browser as tool for digital self-defense ( here in English and here in German ); presentations work for me under the higher-than-default “Safer” security settings in Tor Browser.

topics in operating systems

Topics in Operating Systems

Jan 03, 2020

120 likes | 144 Views

Topics in Operating Systems. Dept. of Computer Science and Engineering Dankook University March 3, 2015 Jongmoo Choi [email protected] http://embedded.dankook.ac.kr/~choijm. Course Objective. Understanding recent operating system research trends

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Topicsin Operating Systems Dept. of Computer Science and Engineering Dankook University March 3, 2015 Jongmoo Choi [email protected] http://embedded.dankook.ac.kr/~choijm

Course Objective • Understanding recent operating system research trends • Micro-kernel, scheduling, memory, file system, security, … • Especially focusing on virtualization, Bigdata and NVRAM • Get accustomed to papers written in English • Find out the general structure of a paper • How to review a paper • Enhance presentation skill • How to make a successful presentation • How to discuss or argue • Make our own paper • How to write a good paper • Submit if possible (or mandatory)

Course text • Recently published papers <FAST> <ATC> <SOSP> <ASPLOS> <Eurosys> <OSDI>

Paperlists (Candidates) • Week 1: Introduction • M. Accetta et al., “Mach: A New Kernel Foundation for UNIX Development”, USENIX Summer Conference, 1986 (with the comparison with “The UNIX Time-Sharing System”). • J. Ousterhout, “Why Aren't Operating Systems Getting Faster as Fast as Hardware?”, USENIX Summer Conference, 1990. • Week 2: Basic components (Scheduling and FS) • C. A. Waldspurger and W. E. Weihl “Lottery Scheduling: Flexible Proportional-Share Resource Management”, OSDI, 1994. • M. Rosenblum and J. Ousterhout, "The Design and Implementation of a Log-Structured File System", ACM ToCS, 1992. • Week 3: Basic components (Memory and Driver) • H. Park et al., "Regularities considered harmful: forcing randomness to memory accesses to reduce row buffer conflicts for multi-core, multi-bank systems", ASPLOS, 2013. • M. M. Swift et al., "Recovering Device Drivers", ACM ToC, 2006. • Week 4: Virtualization • P. Barham et al., "Xen and the Art of Virtualization", SOSP, 2003. • C. A. Waldspurger, “Memory Resource Management in VMware ESX Server”, OSDI, 2002. • Week 5: Bigdata • J. Dean and S. Ghemawat, “MapReduce: Simplified Data Processing on Large Clusters”, OSDI, 2004. • J. Dittrich et al., “Only aggressive elephants are fast elephants”, VLDB, 2012 • Personnel Project: Idea presentation (5 minutes)

Paperlists (Candidates) • Week 6: System security • T. Vidas et al., “All Your Droid are Belong to Us: A Survey of Current Android Attacks”, WOOT, 2011. • S. Govindavajhala and A. Appel, “Using Memory Errors to Attack a Virtual Machine”, IEEE SP, 2003. • Week 7: SSD • J. Ouyang et al., "SDF: software-defined flash for web-scale internet storage systems", ASPLOS, 2014. • M. Jung, et al., "HIOS: A host interface I/O scheduler for Solid State Disks", ISCA, 2014. • Week 8: Reliability • Y. Luo et al. "Characterizing Application Memory Error Vulnerability to Optimize Datacenter Cost via Heterogeneous-Reliability Memory", DSN, 2014. • Y. Cai et al. “Data Retention in MLC NAND Flash Memory: Characterization, Optimization and Recovery”, HPCA, 2015 • Week 9: Cloud computing • H. Wang et al., “A_DRM: Architecture-aware Distributed Resource Management of Virtualized Clusters”, VEE, 2015. • M. Liu et al., "Optimizing Virtual Machine Consolidation Performance on NUMA Server Architcture for Cloud Workloads", ISCA,14. • Week 10: Devices • J. Do et al. "Query Processing on Smart SSDs: Opportunities and Challenges”, SIGMOD, 2013. • D. Tiwari et al., “Active Flash: Towards Energy-Efficient, In-Situ Data Analytics on Extreme-Scale Machine”, FAST, 2013. • J. Draper et al., “The Architecture of the DIVA Processing-In-Memory Chip”, ICS, 2002 • Related paper survey + Progress (Design) presentation (10 minutes)

Paperlists (Candidates) • Week 11: System security II • W. Enck et al., “TaintDroid: An Information-Flow Tracking System for Realtime Privacy Monitoring on Smartphones”, OSDI, 2010. • X. Chen et al., “Overshadow: a virtualization-based approach to retrofitting protection in commodity operating systems”, ASPLOS, 08. • I. Ray et al., “Airavat: Security and Privacy for MapReduce”, NSID, 2010. • Week 12: Bigdata II • H. Herodotou, S. Babu, “Profiling, What-if Analysis and Cost-based Optimization of MapReduce Programs”, VLDB, 2011. • J. Corbett et al., “Spanner: Google’s Globally-distributed Database”, OSDI, 2012 • Week 13: NVM • S. R. Dulloor et al. "System software for persistent memory", Eurosys, 2014 • R. Liu et al., "NVM Duet: Unified Working Memory and Persistent Store Architecture", ASPLOS, 2014. • Week 14: Others • J. Andrus et al., "Cells: A Virtual Mobile Smartphone Architecture", SOSP, 2011 • J. Wires et al., “Characterizing Storage Workloads with Counter Stacks”, OSDI, 2014 • M. Zaharia et al., “Resilient Distributed Datasets: A Fault-Tolerant Abstraction for In-Memory Cluster Computing”, NSDI, 2012. • Week 15: Personnel Project • Final (evaluation result) presentation (20 minutes)

Paperlists (Candidates) • Recommended • Roy Levin and David D. Redell,, "How (and How Not) to Write a Good Systems Paper", 1983. • D. E. Porter et al, "Rethinking the Library OS from the Top Down", ASPLOS, 2011. • C. Dall et al., “KVM/ARM: The Design and Implementation of the Linux ARM Hypervisor”, ASPLOS, 2014 • X. Hu et al., “MutantX-S: Scalable Malware Clustering Based on Static Features”, ATC, 2013 • Y. Jhi et al., “Value-Based Program Characterization and Its Application to Software Plagiarism Detection”, ICSE, 2011. • E. Boutin et al., “Apollo: Scalable and Coordinated Scheduling for Cloud-Scale Computing", OSDI, 2014. • Papers used in other universities • http://codex.cs.yale.edu/avi/os-book/OS9/important-papers.pdf • http://pages.cs.wisc.edu/~bart/736/f2014/reading_list.html#ariane • http://www.cs.utexas.edu/~witchel/380L/schedule.html • http://www.cs.columbia.edu/~nieh/teaching/e6118/lectures/#papers • Please let me know if you have a paper to present. (after 2013)

Lecture details • Presentation (more than 2 times per person) • Q & A • Paper Review • Proposal (per person) • No examination

How to present • Presentation • Time • Presentation: 30 min, Q&A: 10 min • Slide • Less than 15 lines per each page • More than half pages must contain figures • Must include humor slides (if not, less points) • Must include references (if not, less points) • Each slide must be put in the lecture site (send it to [email protected] the previous day of presentation) • Audience • Obligation of audience: at least one question per person a day • Without questions, you can not get a good grade. • Count the number of questions

How to review a paper • Paper Review • All student must submit reviews about papers assigned to the corresponding week. • Format • Summary • 3~5 sentences • Motivation, Proposal, Evaluation • Strength • What are positive things in this paper? • Weakness • What are the down sides of this paper? • Questions or Suggestions • At least 3

How to make a proposal • Proposal • Idea presentation (last week of the first month) • Research area, Brainstorming • Survey presentation and initial design (last week of the second month) • Related papers (prepare references in advance) • Related industrial trends • Final presentation (last week of this semester) • Idea, Related work, New proposal, Evaluation results • Enhance the idea obtained form your presentation • 1) presentation (ppt), 2) paper (tex, hwp, word) • I strongly recommend to submit KCC or 정보과학회 추계학술대회 or …

Evaluation • Evaluation • Presentation(30%) • Questions and Answers(20%) • Paper review (30%) • Final proposal (20%)

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OPERATING SYSTEMS SYSTEMS

OPERATING SYSTEMS SYSTEMS

OPERATING SYSTEMS SYSTEMS. 9 th January 11CS10002. BATCH SYSTEMS. In these systems though there are many jobs in the job pool only one job is entered into the memory and no other job is selected till the current running job is terminated. OS. J1. J0. J2. J3. J4. LIMITATIONS.

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Protection in Operating Systems

Protection in Operating Systems

Protection in Operating Systems. Well, a brief consideration of it. There is too much material to cover this in any great depth. Security Features. User authentication Memory Protection Each user’s program must run in a portion of memory protected from unauthorized access

820 views • 47 slides

Security in Operating Systems

Security in Operating Systems

Security in Operating Systems. Cuiwei Zhao. Security in Operating System. Security breaches Security goals Protected objects of the general purpose operating system Protection of objects. Beaches. Exposure A form of possible loss or harm in a computing system Vulnerability

306 views • 30 slides

presentation topics on operating system

Operating Systems

2. what is os, 3. what os does, 4. structure of operating system:, 5. structure of operating system, 6. structure of operating system, 7. evolution of os:, 8. evolution of os:, 9. evolution of os:, 10. batch processing:, 11. batch processing :, 12. multiprogramming:, 13. multiprogramming :, 14. time sharing systems:, 15. operating systems functions:, 16. types of os:, 17. single user systems:, 18. multi-user systems:.

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presentation topics on operating system

Special Topics on Operating System

Inferno. other embedded operating systems. 3. trends of operating system ... desktop : windows 98/nt, unix/linux. embedded : win/ce, inferno,vxwork, jini,... 4 ... – powerpoint ppt presentation.

  • R. C. Chang
  • Linux Internal
  • Microkernels
  • Window CE Internal
  • Other Embedded Operating Systems
  • Server UNIX/Linux, Windows/NT
  • Desktop Windows 98/NT, UNIX/Linux
  • Embedded WIN/CE, Inferno,VxWork, JINI,
  • Monolithic Kernel
  • UNIX, Windows/98, Linux
  • First Generation Microkernel
  • Mach, Chorus,
  • Second Generation Microkernel
  • L4, Exokernel,...
  • Text Book The Linux Kernel by David A. Rusling, (Please Download the book from Internet)
  • Reference Books Linux Kernel Internals (Second Edition) by M. Beck et al., Addison-Wesley, 1998
  • A typical PC Motherboard
  • D-Cache, I-Cache
  • Cache Coherence
  • Controllers and Peripherals
  • IDE, SCSI, NIC,
  • Address Space
  • What is an operating system?
  • Memory management
  • PID TTY STAT TIME COMMAND
  • 158 pRe 1 000 -bash
  • 174 pRe 1 000 sh /usr/X11R6/bin/startx
  • 175 pRe 1 000 xinit /usr/X11R6/lib/X11/xini t/xinitrc --
  • 178 pRe 1 N 000 bowman
  • 182 pRe 1 N 001 rxvt -geometry 120x35 -fg white -bg black
  • 184 pRe 1 lt 000 xclock -bg grey -geometry -1500-1500 -padding 0
  • 185 pRe 1 lt 000 xload -bg grey -geometry -0-0 -label xload
  • 187 pp6 1 926 /bin/bash
  • 202 pRe 1 N 000 rxvt -geometry 120x35 -fg white -bg black
  • 203 ppc 2 000 /bin/bash
  • 1796 pRe 1 N 000 rxvt -geometry 120x35 -fg white -bg black
  • 1797 v06 1 000 /bin/bash
  • 3056 pp6 3 lt 002 emacs intro/introduction.tex
  • 3270 pp6 3 000 ps
  • Device Drivers
  • Controller Chips
  • NCR810 SCSI
  • The Filesystems
  • EXT2,CDROM,...
  • Hash Tables
  • Abstract Interfaces
  • /proc/filessystems
  • Virtual Memory
  • large address space
  • memory mapping
  • fair physical memory allocation
  • shared virtual memory
  • Load virtual pages that are currently bein used by the executing program
  • Page fault handling
  • Linux uses demand paging to load executable images into a processes virtual memory
  • If a process needs to bring a virtual page into physical memory and there are no free physical pages available
  • Clean or read-only pages --gt Disacrd
  • Dirty page --gt swapping
  • Linux uses a Least Recently Used page aging technique to choose pages
  • OS usually runs in physical address model
  • Alpha AXP processor does not have a special physical addressing model.
  • It divides up the memory space into several areas and designates two of them as physical address area
  • KSEG (0xfffffc000310000)
  • Buffer Cache block device drivers(hard disks)
  • Page Caches Speed up access to images and data on disk.
  • Swap Cache only modified(dirty) pages are saved in the swap file.
  • Hardware Caches Data/Instruction, TLB
  • Physical page mem_map structure
  • mem_map_t for each physical page(initialized at the boot time)
  • Important fields
  • count, age, man_nr (physical frame number)
  • free-area vector is used to find free pages
  • Buddy algorithm
  • Pages are allocated in blocks which are powers of 2 in size
  • The page deallocation code recombine pages into large blocks of free pages whenever it can
  • Virtual memory is represented by an mm_structure data structure
  • vm_area_structure
  • Search for vm_area_struct (AVL Tree)
  • If no (access illegal virtual address)--gt SIGSEGV
  • Check for type of access
  • Decide the page in swap file or somewhere in disk
  • if the page page table entry is invalid but not empty then it is in swap file
  • nopage operation(by using page cache)
  • Memory mapped files are read a page at a time and these pages are stored in the page cache
  • Search through page_hash_table
  • Linux --gt single page read ahead
  • Kernel Swap Daemon(kswapd)
  • kernel thread
  • keep enough free pages in the system
  • started by init process and wait for kernel swap timer to periodcally expire
  • if of free pages gt free_page_high do nothing
  • otherwise kswapd try to reduce the number of physical pages being used by the system
  • Reduce the size of the buffer and page caches
  • clock algorithm
  • Swapping out System V shared memory pages
  • update multiple page table entries
  • Swapping out and discarding pages
  • When swapping pages out, Linux avoids writing pages if it does not have to
  • Swap cache --gt a PTE for a swapped out page
  • If a swap cache is non-zero, a page in swap file has not been modified --gt no need to write the page to the swap file
  • Demand paging
  • swapin operation

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Powerpoint Templates and Google slides for Operating Systems

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Effective budget system to recognize fiscal planning and co ordinate departmental operations complete deck

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System Operator Powerpoint Presentation Slides

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Operating System Powerpoint Ppt Template Bundles

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One pager computer operating system upgrade proposal template

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Ethical Operating System Os Risk Mitigation Checklist Playbook To Mitigate Negative Of Technology

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Impact of hypervisor virtualization on server operating system

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  6. Presentation On Operating System by Yash Patel

COMMENTS

  1. Operating System Concepts

    The slides below are copyright Silberschatz, Galvin and Gagne, 2018. The slides are authorized for personal use, and for use in conjunction with a course for which Operating System Concepts is the prescribed text. Instructors are free to modify the slides to their taste, as long as the modified slides acknowledge the source and the fact that ...

  2. Operating System Concepts Essentials

    The slides are authorized for personal use, and for use in conjunction with a course for which Operating System Concepts is the prescribed text. Instructors are free to modify the slides to their taste, as long as the modified slides acknowledge the source and the fact that they have been modified. Paper copies of the slides may be sold ...

  3. PDF Operating Systems

    virtual address space, set of resources (object handles), and one or more threads. A thread are the unit of dispatching. Each thread has: scheduling state (ready, running, etc.), other scheduling parameters (priority, etc), context slot, and (generally) an associated process.

  4. Operating System Tutorial

    An Operating System (OS) is software that manages and handles the hardware and software resources of a computer system. It provides interaction between users of computers and computer hardware. An operating system is responsible for managing and controlling all the activities and sharing of computer resources. An operating system is a low-level ...

  5. 1. Introduction

    Introduction — Introduction to Operating Systems. 1. Introduction. This part of the book gives an overview of everything you will learn in more detail in the rest of the book. We start by discussing the purpose of operating systems today, why it is so valuable to understand them, and some of the reasons we expect operating systems to continue ...

  6. PDF CS240

    Why study operating systems? • Operating systems are a maturing field - Most people use a handful of mature OSes - Hard to get people to switch operating systems - Hard to have impact with a new OS • High-performance servers are an OS issue - Face many of the same issues as OSes • Resource consumption is an OS issue - Battery life, radio ...

  7. PDF CS240

    • For many systems, disks are the limiting factor • Can limit throughput far below network capacity - E.g., cut naïve video server throughput by factor of 7-8 • Can also limit capacity of a system • Example: build a system to index CS240 lecture notes - Scan all files, create index file - Rely on kernel for low-level details of ...

  8. Operating System Concepts PowerPoint and Google Slides Template

    Get hold of our 100% authentic Operating System Concepts presentation template, designed for PowerPoint and Google Slides, to describe how the operating system manages different tasks, processes, and applications in a computer. You can also explain how it distributes resources to several computer programs.

  9. Important Topics in Operating Systems

    An operating system is the most important piece of software that runs on a computer. It manages the computer's computational activities associated with the hardware and provides services for ...

  10. Open Educational Resource (OER) presentations for a course on Operating

    Presentations below will be updated for use in 2023 during the term. Presentations are "ready" if a link in Learnweb exists. List of index terms for Operating Systems (may simplify search for specific topics). OS Motivation (PDF, condensed PDF) OS Overview (PDF, condensed PDF) Self-study presentations OS Introduction (PDF, condensed PDF)

  11. PPT

    OS support tasks 1. Provides the facilities to create, modification of program and data files using an editor. 2. Access to the compiler for translating the user program from high level language to machine language. 3. Provide a loader program to move the compiled program code to computer's memory for execution.

  12. PDF Presentation of Operating Systems UNIT-1 Part 1 : operating systems

    Operating System Concepts Essentials -8th Edition 1.4 Silberschatz, Galvin and Gagne ©2011 A program that acts as an intermediary between a user of a computer and the computer hardware Operating system goals: Execute user programs and make solving user problems easier Make the computer system convenient to use Use the computer hardware in an efficient manner

  13. Advanced Topics in Operating Systems

    Topics Include. Concurrent execution. Memory management using things like virtual memory and memory allocations. Scalability such as lock-free data structures. File systems. Operating system architecture. Virtualization. Security such as data security, integrity and authentication. The history and experience of systems programming.

  14. PPT

    An Image/Link below is provided (as is) to download presentation Download Policy: ... CMPT 886: Special Topics in Operating Systems and Computer Architecture. Dr. Alexandra Fedorova School of Computing Science SFU. Meet the Instructor. Ph.D . in Computer Science from Harvard, 2006 Dissertation on operating system design for multicore processors ...

  15. Operating Systems

    Presentation Topic:Operating Systems 2. What is OS? Operating System is a software, which makes a computer to actually work. It is the software the enables all the programs we use. The OS organizes and controls the hardware. OS acts as an interface between the application programs and the machine hardware. Examples: Windows, Linux, Unix and Mac ...

  16. Special Topics on Operating System

    Title: Special Topics on Operating System 1 Special Topics on Operating System. R. C. Chang; 2 Tentative Topics. Linux Internal ; Microkernels ; Window CE Internal ; Inferno ; Other Embedded Operating Systems; 3 Trends of Operating System. Server UNIX/Linux, Windows/NT ; Desktop Windows 98/NT, UNIX/Linux ; Embedded WIN/CE, Inferno,VxWork, JINI ...

  17. Operating Systems PowerPoint Presentation and Slides

    Deliver an informational PPT on various topics by using this Robotic Automation Systems For Efficient Industrial Operations Powerpoint Presentation Slides. This deck focuses and implements best industry practices, thus providing a birds-eye view of the topic. Encompassed with seventy slides, designed using high-quality visuals and graphics ...

  18. Most Popular Computer Operating Systems 2024 #PC # ...

    Most Popular Computer Operating Systems 2024 #PC #operatingsystems #windows #microsoft #windows10 #windows11 #desktop #computers #macos