Operating System Structure
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This document discusses different operating system structures, including simple, layered, microkernel, modular, and hybrid structures. It provides examples of hybrid systems like Mac OS X, iOS, and Android. It also describes the VxWorks operating system structure and its use of a task control block (TCB) that contains elements like delay timers, time slices, signal handlers, and kernel control structures. The document is intended as an overview for a student of software engineering.
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Operating System Structure (documentation)
1. Operating system structures can be simple, layered, or use a microkernel approach. Simple structures like MS-DOS do not have well-defined layers, while layered structures break the OS into smaller, more modular components. Microkernel structures remove nonessential components from the kernel into user-level programs.
2. Modern OSes often use a hybrid approach, combining elements from different structures. They may also use loadable kernel modules to dynamically link additional services.
3. A task control block (TCB) contains the state of a thread of execution in an OS, and typically includes the program counter, CPU registers, stack, I/O assignments, timers, and kernel data structures.
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- The role of an operating system is to act as an intermediary between the user and computer hardware to execute programs and allocate resources efficiently.
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The document discusses operating systems, defining them as software that manages computer hardware resources and enables communication between hardware and software. It describes the main components and functions of operating systems, including managing processors, memory, devices, user interfaces, and more. The key components are the shell, which handles user interactions, and the kernel, which manages communication with hardware. Examples of different types of operating systems discussed are standalone systems like Windows, MacOS, and Linux, server systems, embedded systems, and mobile operating systems.
Vx works RTOS
VxWorks is a real-time operating system developed by Wind River Systems that supports ARM, Intel, and other popular processor architectures. It provides a multitasking environment, virtual memory management, networking capabilities, and powerful development tools. VxWorks uses a client-server microkernel architecture and is highly configurable, allowing it to scale from small embedded systems to large networks. It prioritizes real-time deterministic performance and has found widespread use in avionics, medical devices, industrial automation, and other applications.
Dev ecosystem v1.1
My old slides about build tools and software development ecosystem:
- Jenkins
- Maven
- Nexus
- Sonar plus code analyzing tools
minimesos. Apache Mesos made easy
Are you developing new Apache Mesos framework and wonder how you can test it as part of your CI builds? Are you looking for a quick way to try out new Mesos framework without starting a massive cluster and crewing your development box? Do you want to test your application in clusters of different size and switch among them within a minute? In other case minimesos (http://minimesos.org/) is the tool to use. During this talk we will show how you can manage Mesos cluster from your test code and how you can make multiple clusters wait to be started on your single box
OSDC 2015: Bernd Mathiske | Why the Datacenter Needs an Operating System
Developers are moving away from their host-based patterns and adopting a new mindset around the idea that the datacenter is the computer. It?s quickly becoming a mainstream model that you can view a warehouse full of servers as a single computer (with terabytes of memory and tens of thousands of cores). There is a key missing piece, which is an operating system for the datacenter (DCOS), which would provide the same OS functionality and core OS abstractions across thousands of machines that an OS provides on a single machine today. In this session, we will discuss:
How the abstraction of an OS has evolved over time and can cleanly scale to spand thousands of machines in a datacenter.
How key open source technologies like the Apache Mesos distributed systems kernel provide the key underpinnings for a DCOS.
How developers can layer core system services on top of a distributed systems kernel, including an init system (Marathon), cron (Chronos), service discovery (DNS), and storage (HDFS)
What would the interface to the DCOS look like? How would you use it?
How you would install and operate datacenter services, including Apache Spark, Apache Cassandra, Apache Kafka, Apache Hadoop, Apache YARN, Apache HDFS, and Google's Kubernetes.
How will developers build datacenter-scale apps, programmed against the datacenter OS like it?s a single machine?
In a monolithic kerne1
A monolithic kernel runs all operating system services and device drivers in the kernel space of memory. This provides rich hardware access but dependencies between system components mean a bug can crash the entire system. A microkernel moves most OS services like networking and filesystems into userspace processes or "servers" that communicate through a minimal kernel. This improves modularity and stability but incurs more overhead from frequent context switches between user and kernel mode.
In a monolithic kerne1
A monolithic kernel runs all operating system services and device drivers in the kernel space of memory. This provides rich hardware access but dependencies between system components mean a bug can crash the entire system. A microkernel moves most OS services like networking and filesystems into userspace processes or "servers" that communicate through a minimal kernel. This improves modularity and stability but incurs more overhead from frequent context switches between user and kernel mode.
Introduction of ONOS and core technology
This document provides an overview of ONOS (Open Network Operating System) including:
- ONOS is an open-source SDN controller created by ON.LAB to provide carriers with an SDN/NFV solution.
- It aims to be carrier-grade with high availability, scalability, and performance through a distributed architecture.
- ONOS uses southbound protocols like OpenFlow and Netconf to configure network elements while providing northbound APIs and applications.
Java Development EcoSystem
This document discusses the Java development ecosystem. It describes common development tools like Jenkins, source control systems, Maven, Nexus, code analysis tools, and Sonar. These tools help with tasks like continuous integration, dependency management, code quality analysis, and monitoring project metrics over time. Sonar in particular collects results from analysis tools and provides visual dashboards to track metrics and summarize projects' test coverage, lines of code, and other indicators.
Vmm concepts
This document discusses virtualization concepts and provides definitions and background information. It begins with references and sources on virtualization. It then defines virtualization and key terms like virtual machine monitor and guest/host. It covers the origins and principles of virtualization, how virtualization was rediscovered, and discusses various virtualization architectures, interfaces, types of virtual machine monitors, and strategies for virtualizing systems like the IA-32 architecture. It concludes by discussing memory management challenges in virtualization.
Vmm concepts
This document discusses virtualization concepts and provides definitions and background information. It begins with references and sources on virtualization. It then defines virtualization and key terms like virtual machine monitor and guest/host. It covers the origins and principles of virtualization, how virtualization was rediscovered, and discusses various virtualization architectures, interfaces, types of virtual machine monitors, and strategies for virtualizing systems like the IA-32 architecture. It concludes by discussing memory management challenges in virtualization.
Understanding Modern Device Drivers
Drivers do more than just I/O - 15% perform data processing. Only 23% of code is for I/O and interrupts, with 36% for initialization and cleanup. 44% of drivers do not conform to class definitions due to unique parameters, ioctls, and interactions. There are opportunities to improve abstractions, as at least 8% of code is similar across drivers. Better abstractions could reduce code size and bugs.
What You Should Know About WebLogic Server 12c (12.2.1.2) #oow2015 #otntour2...
Tech bits about Oracle WebLogic Server 12c.
Something more recent: https://www.youtube.com/watch?v=sHCTJNRjdcM
Operating system
Sistem operasi adalah perangkat lunak yang mengontrol dan mengelola perangkat keras komputer serta menjalankan aplikasi. Sistem operasi memiliki fungsi utama seperti menjalankan komputer, menyediakan antarmuka pengguna, mengelola program, mengelola memori, dan mengontrol jaringan. Ada berbagai jenis sistem operasi seperti mainframe, embedded, Unix-like, Mac OS, Windows, jaringan, dan webOS. Program utilitas seperti antivirus dan firewall juga membantu sistem
SQL Server on Linux
How SQL Server was ported to Linux? The presentation goes through some of the concepts: SQLOS, Drawbridge and Containers. It shows the role of SQLPAL as a platform abstraction layer.
Os Ds Arch
There are three main approaches to operating system architecture for distributed systems: monolithic kernels, layered architectures, and microkernels. Microkernels provide only basic mechanisms like threads and inter-process communication, with other services run as user-level servers. This separates mechanisms from policies and allows services to be dynamically loaded as needed. Popular microkernel systems include Mach and QNX, which have advantages like extensibility and modularity but disadvantages in efficiency compared to monolithic kernels, which perform all functions in the kernel for better application performance but are difficult to extend. Many modern systems use hybrid approaches.
Similar to Operating System Structure (20)
An Updated Performance Comparison of Virtual Machines and Linux Containers
An Updated Performance Comparison of Virtual Machines and Linux Containers
OSDC 2015: Bernd Mathiske | Why the Datacenter Needs an Operating System
OSDC 2015: Bernd Mathiske | Why the Datacenter Needs an Operating System
What You Should Know About WebLogic Server 12c (12.2.1.2) #oow2015 #otntour2...
What You Should Know About WebLogic Server 12c (12.2.1.2) #oow2015 #otntour2...
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E-commerce Development Services- Hornet Dynamics
For any business hoping to succeed in the digital age, having a strong online presence is crucial. We offer Ecommerce Development Services that are customized according to your business requirements and client preferences, enabling you to create a dynamic, safe, and user-friendly online store.
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SQL has attained widespread adoption, but Business Intelligence tools still use their own higher level languages based upon a multidimensional paradigm. Composable calculations are what is missing from SQL, and we propose a new kind of column, called a measure, that attaches a calculation to a table. Like regular tables, tables with measures are composable and closed when used in queries.
SQL-with-measures has the power, conciseness and reusability of multidimensional languages but retains SQL semantics. Measure invocations can be expanded in place to simple, clear SQL.
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A talk at SIGMOD, June 9–15, 2024, Santiago, Chile
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https://doi.org/10.1145/3626246.3653374
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Oracle Database 19c New Features for DBAs and Developers. This video you can watch from my youtube channel at https://youtu.be/m-F-mZA3MkU
Neo4j - Product Vision and Knowledge Graphs - GraphSummit Paris
Dr. Jesús Barrasa, Head of Solutions Architecture for EMEA, Neo4j
Découvrez les dernières innovations de Neo4j, et notamment les dernières intégrations cloud et les améliorations produits qui font de Neo4j un choix essentiel pour les développeurs qui créent des applications avec des données interconnectées et de l’IA générative.
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留信网认证的作用:
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2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
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6:个人职称评审加20分
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UI5con 2024 - Boost Your Development Experience with UI5 Tooling Extensions
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AI Fusion Buddy Review: Brand New, Groundbreaking Gemini-Powered AI App
AI Fusion Buddy Review: Brand New, Groundbreaking Gemini-Powered AI App
👉👉 Click Here To Get More Info 👇👇
https://sumonreview.com/ai-fusion-buddy-review
AI Fusion Buddy Review: Key Features
✅Create Stunning AI App Suite Fully Powered By Google's Latest AI technology, Gemini
✅Use Gemini to Build high-converting Converting Sales Video Scripts, ad copies, Trending Articles, blogs, etc.100% unique!
✅Create Ultra-HD graphics with a single keyword or phrase that commands 10x eyeballs!
✅Fully automated AI articles bulk generation!
✅Auto-post or schedule stunning AI content across all your accounts at once—WordPress, Facebook, LinkedIn, Blogger, and more.
✅With one keyword or URL, generate complete websites, landing pages, and more…
✅Automatically create & sell AI content, graphics, websites, landing pages, & all that gets you paid non-stop 24*7.
✅Pre-built High-Converting 100+ website Templates and 2000+ graphic templates logos, banners, and thumbnail images in Trending Niches.
✅Say goodbye to wasting time logging into multiple Chat GPT & AI Apps once & for all!
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See My Other Reviews Article:
(1) AI Genie Review: https://sumonreview.com/ai-genie-review
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A Study of Variable-Role-based Feature Enrichment in Neural Models of Code
Understanding variable roles in code has been found to be helpful by students
in learning programming -- could variable roles help deep neural models in
performing coding tasks? We do an exploratory study.
- These are slides of the talk given at InteNSE'23: The 1st International Workshop on Interpretability and Robustness in Neural Software Engineering, co-located with the 45th International Conference on Software Engineering, ICSE 2023, Melbourne Australia
GreenCode-A-VSCode-Plugin--Dario-Jurisic
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Need for Speed: Removing speed bumps from your Symfony projects ⚡️
No one wants their application to drag like a car stuck in the slow lane! Yet it’s all too common to encounter bumpy, pothole-filled solutions that slow the speed of any application. Symfony apps are not an exception.
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We will focus in particular on tuning your engine at the application level, making the right adjustments to ensure that your system responds like a well-oiled, high-performance race car.
How to write a program in any programming language
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Artificia Intellicence and XPath Extension Functions
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Explore the seamless transition to e-invoicing with this comprehensive guide tailored for Saudi Arabian businesses. Navigate the process effortlessly with step-by-step instructions designed to streamline implementation and enhance efficiency.
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A lot of technical challenges and complexity come with building a cloud-native and distributed architecture. The way we develop backend software has fundamentally changed in the last ten years. Managing a microservices architecture demands a lot of us to ensure observability and operational resiliency. But did you also change the way you run your development teams?
Sven will talk about Atlassian’s journey from a monolith to a multi-tenanted architecture and how it affected the way the engineering teams work. You will learn how we shifted to service ownership, moved to more autonomous teams (and its challenges), and established platform and enablement teams.
What is Augmented Reality Image Tracking
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Oracle Database 19c New Features for DBAs and Developers.pptx
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Neo4j - Product Vision and Knowledge Graphs - GraphSummit Paris
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Operating System Structure
- 1. Operating System Structures BY NAVID DANESHVARAN SOFTWARE ENGINEERING STUDENT AT KHARAZMI UNIVERSITY
- 2. 2 Types of Operating System Structures Simple Structure
- 3. 3 Limited Hardware Effect Traditional UNIX system structure
- 4. 4 Types of Operating System Structures Layered Approach
- 5. 5 Types of Operating System Structures Microkernel
- 6. 6 Types of Operating System Structures Modules
- 7. 7 Types of Operating System Structures Hybrid Systems MAC OS X
- 8. 8 Types of Operating System Structures Hybrid Systems iOS
- 9. 9 Types of Operating System Structures Hybrid Systems Android
- 11. 11 VxWorks VxWorks System Call
- 12. 12 VxWorks VxWorks TCB: a delay timer a time-slice timer signal handlers kernel control structures Etc.
- 13. 13 Resources [1] A. Silberschatz, Operating System Concepts, 2012. [2] "vxworks_kernel_programmers_guide_6.2," [Online]. Available: https://www.uio.no/studier/emner/matnat/fys/FYS4220/h11/undervisningsmateriale/laboppgaver- rt/vxworks_kernel_programmers_guide_6.2.pdf. [3] "TCB in VxWorks," [Online]. Available: http://comp.os.vxworks.narkive.com/0awyxysO/tcb-in-vxworks. References
Editor's Notes
- Mach provides memory management; support for remote procedure calls (RPCs) and interprocess communication (IPC) facilities, including message passing; and thread scheduling. The BSD component provides a BSD command-line interface, support for networking and file systems, and an implementation of POSIX APIs, including Pthreads. I/O kit for development of device drivers and dynamically loadable modules (which Mac OS X refers to as kernel extensions)
- Cocoa Touch is an API for Objective-C that provides several frameworks for developing applications that run on iOS devices. The media services layer provides services for graphics, audio, and video. The core services layer provides a variety of features, including support for cloud computing and databases. The bottom layered presents the core operating system, which is based on the kernel environment of MAC OS X.
- Linux is used primarily for process, memory, and device-driver support for hardware and has been expanded to include power management. frameworks for developing web browsers (webkit), database support (SQLite), and multimedia. The libc library is similar to the standard C library but is much smaller and has been designed for the slower CPUs that characterize mobile devices.