The document discusses some of the key challenges faced when using a real-time operating system (RTOS) for embedded applications. It outlines five main challenges: 1) deciding when to use an RTOS; 2) setting appropriate task priorities; 3) debugging complex RTOS-based systems; 4) managing memory across the operating system and application layers; and 5) overcoming the steep learning curve required to design RTOS-based applications. Addressing these challenges requires skills such as priority-based scheduling, tracing tools, memory optimization, and hands-on practice to effectively develop with an RTOS.
1. Single partition allocation allocates memory such that the operating system resides in lower memory and user processes in higher memory. Limit and relocation registers protect processes. Multiple partition allocation divides memory into partitions, with each process allocated one partition.
2. A process control block (PCB) contains process state, scheduling information, registers, and memory allocation details. Useful PCB information includes the program counter, I/O status, process state like ready or running, accounting data, and CPU registers.
3. Preemptive scheduling interrupts running lower priority processes to run higher priority ones, like round robin. Non-preemptive scheduling runs processes to completion without interruption, like first-come first-
The document discusses various functions and responsibilities of an operating system. It describes how the operating system manages memory, processors, devices, files, security, system performance, job accounting, error detection, and coordination between software and users. It also discusses different types of operating systems including batch, time-sharing, distributed, network, real-time, and their key features. The main functions of an operating system include program execution, I/O operations, file management, communication, resource allocation, protection and error handling.
An operating system manages computer hardware resources and provides an interface between users and applications. It controls hardware, allocates memory and storage space, manages files, handles input/output between hardware and applications, provides security, and interprets commands. The main goals of an operating system are to make the computer convenient for users and efficiently use hardware resources. Common operating systems include those for mainframes, personal computers, distributed systems, real-time systems, and more specialized operating systems. Operating systems perform essential functions like process management, memory management, file management, input/output management, secondary storage management, and more.
This document discusses an operating system slideshow presentation titled "Operating System". It provides details on the presentation such as the number of views it has received, when it was published, and comments and likes from other users. The presentation contains information on operating system concepts such as processes, memory management, CPU scheduling, and deadlocks.
The document discusses the evolution of operating systems from mainframe to desktop and distributed systems. It describes [1] how mainframe systems used batch processing and multiprogramming to improve CPU utilization, [2] how time-sharing systems enabled interactive use by rapidly switching between users, [3] how personal computers led to single-user desktop systems like MS-DOS and Windows, and [4] how distributed systems employ client-server and multiprocessing architectures to share resources over networks.
An operating system acts as an interface between computer hardware and software, managing computer resources and allowing users to run application programs. There are several types of operating systems including batch, time-sharing, distributed, network, and real-time systems. The five most common operating systems are Ubuntu, Android, Mac OS X, iOS, and Windows, each having their own unique features and compatibility with different hardware.
An operating system manages computer hardware and software resources and acts as an interface between users and applications. It performs basic tasks like memory management, process scheduling, input/output control, and file management. There are different types of operating systems including batch, time-sharing, distributed, network, and real-time operating systems. An operating system allocates resources, schedules processes, manages memory and devices, handles security and errors, and provides file management functionality.
The document discusses operating systems and functions performed by an operating system. It begins by defining an operating system as software that enables computer hardware to communicate and operate with computer software. Without an OS, a computer would be useless. It then lists and describes 9 important functions performed by most operating systems, including processor management, memory management, input/output management, file management, establishing a priority system, automatic job transition, interpreting commands and instructions, coordinating programs, and facilitating communication.
1. Single partition allocation allocates memory such that the operating system resides in lower memory and user processes in higher memory. Limit and relocation registers protect processes. Multiple partition allocation divides memory into partitions, with each process allocated one partition.
2. A process control block (PCB) contains process state, scheduling information, registers, and memory allocation details. Useful PCB information includes the program counter, I/O status, process state like ready or running, accounting data, and CPU registers.
3. Preemptive scheduling interrupts running lower priority processes to run higher priority ones, like round robin. Non-preemptive scheduling runs processes to completion without interruption, like first-come first-
The document discusses various functions and responsibilities of an operating system. It describes how the operating system manages memory, processors, devices, files, security, system performance, job accounting, error detection, and coordination between software and users. It also discusses different types of operating systems including batch, time-sharing, distributed, network, real-time, and their key features. The main functions of an operating system include program execution, I/O operations, file management, communication, resource allocation, protection and error handling.
An operating system manages computer hardware resources and provides an interface between users and applications. It controls hardware, allocates memory and storage space, manages files, handles input/output between hardware and applications, provides security, and interprets commands. The main goals of an operating system are to make the computer convenient for users and efficiently use hardware resources. Common operating systems include those for mainframes, personal computers, distributed systems, real-time systems, and more specialized operating systems. Operating systems perform essential functions like process management, memory management, file management, input/output management, secondary storage management, and more.
This document discusses an operating system slideshow presentation titled "Operating System". It provides details on the presentation such as the number of views it has received, when it was published, and comments and likes from other users. The presentation contains information on operating system concepts such as processes, memory management, CPU scheduling, and deadlocks.
The document discusses the evolution of operating systems from mainframe to desktop and distributed systems. It describes [1] how mainframe systems used batch processing and multiprogramming to improve CPU utilization, [2] how time-sharing systems enabled interactive use by rapidly switching between users, [3] how personal computers led to single-user desktop systems like MS-DOS and Windows, and [4] how distributed systems employ client-server and multiprocessing architectures to share resources over networks.
An operating system acts as an interface between computer hardware and software, managing computer resources and allowing users to run application programs. There are several types of operating systems including batch, time-sharing, distributed, network, and real-time systems. The five most common operating systems are Ubuntu, Android, Mac OS X, iOS, and Windows, each having their own unique features and compatibility with different hardware.
An operating system manages computer hardware and software resources and acts as an interface between users and applications. It performs basic tasks like memory management, process scheduling, input/output control, and file management. There are different types of operating systems including batch, time-sharing, distributed, network, and real-time operating systems. An operating system allocates resources, schedules processes, manages memory and devices, handles security and errors, and provides file management functionality.
The document discusses operating systems and functions performed by an operating system. It begins by defining an operating system as software that enables computer hardware to communicate and operate with computer software. Without an OS, a computer would be useless. It then lists and describes 9 important functions performed by most operating systems, including processor management, memory management, input/output management, file management, establishing a priority system, automatic job transition, interpreting commands and instructions, coordinating programs, and facilitating communication.
The document provides an overview of operating system concepts and functions. It discusses that an operating system manages computer hardware resources and provides common services for computer programs. It then describes some key functions of an operating system including memory management, processor management, device management, file management, and other services like security and error detection. The document also covers different types of operating systems such as batch, time-sharing, distributed, network, and real-time operating systems.
Slide Pengantar Teknologi Informasi - Software
Objectives:
Students are able to explain software and hardware function.
Distinguish between operating systems and applications software
List the various methods by which individuals and businesses acquire software
List and briefly describe various types of task-oriented software
Identify the kinds of software available for both large and small businesses
Discuss ethical issues associated with software
The document discusses different types of operating systems:
1. Batch operating systems where users submit jobs offline and jobs are run in batches.
2. Time-sharing operating systems allow multiple users to use a computer simultaneously by quickly switching between users.
3. Distributed operating systems use multiple connected processors to serve real-time applications and users across different locations.
An operating system is software that manages computer resources and provides services to application programs. It sits between the computer hardware and application software. There are three main types of operating systems: stand-alone, network, and embedded. Real-time operating systems (RTOS) are designed for applications with time-critical deadlines like process control. Key features of an RTOS include short and predictable context switching, interrupt handling times, and inter-process communication. Popular RTOS include VxWorks, QNX, and RTLinux.
The document discusses the history and evolution of operating systems from early serial processing systems through batch processing, multiprogramming, and time-sharing systems. It describes how early systems had no operating system, requiring users to reserve computer time slots in advance. Later batch systems used a monitor program to process multiple jobs sequentially. Multiprogramming and time-sharing systems allowed concurrent execution of multiple programs to improve processor utilization but introduced challenges around memory organization and scheduling. The document also discusses system calls and interrupt processing.
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The operating system controls the computer's hardware and software, acting as an interface between applications and hardware. It loads itself into RAM during startup through a bootstrapping process. The operating system manages user accounts, runs programs, allocates memory, controls devices, and performs housekeeping tasks. It uses various interfaces like graphical user interfaces and command line interfaces. Utility programs perform important system tasks like formatting disks, managing files, compressing files, and scanning for viruses. The operating system also manages buffers for temporary data storage, uses interrupts to communicate with devices, performs handshaking for connections, and calculates checksums to check data integrity. It is responsible for file creation, deletion, directories, and mapping files to storage.
The document discusses the system development life cycle (SDLC), which includes requirements, design, implementation, testing, deployment, operations, and maintenance. It describes the typical phases of the SDLC process - preliminary investigation, feasibility study, system analysis, system design, software development, system testing, implementation and evaluation, and maintenance. The waterfall model is presented as a common SDLC approach, with its sequential phases of requirement analysis, system design, implementation, testing, deployment, and maintenance.
This document outlines the syllabus for an Operating Systems course. It covers four modules: evolution of operating systems and process management; process synchronization, threads, concurrency tools, and deadlock prevention; memory management including paging, segmentation, and virtual memory; and file systems including disk scheduling and I/O. The key functions of an operating system are also summarized, including process management, memory management, and file management.
This presentation gives a brief overview of the concept of Operating Systems to the newbies, and helps to familiarize them with some of the most popular operating systems out there and their features.
An operating system manages computer hardware resources and provides common services for computer programs. It acts as an interface between users and hardware and hides hardware complexity. Early operating systems scheduled batch jobs, but modern systems support time-sharing with many simultaneous interactive users through techniques like multiprogramming and CPU scheduling. Distributed operating systems further extend these concepts across networked computers. Real-time operating systems guarantee response times for critical tasks.
An operating system (OS) is software that manages computer hardware and software. Common desktop operating systems include Windows, Mac OS X, and Linux.
This document provides an overview of operating systems. It defines an operating system and describes its main functions like resource sharing and control of application programs. It discusses different OS architectures including monolithic, layered, and microkernel designs. It also describes different types of operating systems such as batch, multiprogramming, multitasking, multi-user, multiprocessing, and real-time operating systems.
This document provides definitions and explanations of key operating system concepts. It begins with defining an operating system as a program that manages computer hardware and acts as an interface between users and hardware. It then lists operating system functions like process management, memory management, and I/O management. The document discusses different types of systems like batch, interactive, time-sharing and real-time systems. It also covers process states, scheduling, and synchronization concepts like critical sections.
CSI-503 - 10. Security & Protection (Operating System) ghayour abbas
The document discusses security and protection in operating systems. It defines security as a mechanism that analyzes users and permits authorized access to system resources through authentication and encryption. Protection deals with controlling access to system resources and determining which files a user can access. The document provides examples of how organizations implement security and protection measures to restrict access to information.
Operating system structures all describe in details.
System Components
Operating System Services
System Calls
System Programs
System Structure
Virtual Machines
System Design and Implementation
The document discusses various topics related to data synchronization in mobile computing systems. It defines data synchronization as maintaining availability and consistency of data across distributed systems. It describes different types of synchronization including two-way synchronization between devices, server-alerted synchronization, one-way server-initiated synchronization, and client-initiated refresh synchronization. It also discusses synchronization software, protocols, mobile device servers, management, file systems, and security considerations.
This course outline describes a fundamentals of operating systems course. The course introduces operating system design and implementation, covering the evolution of operating systems and major components. Key topics include process management, memory management, file systems, and operating system support for distributed systems. The course involves lectures, practical exercises, and assessments including quizzes, tests, laboratory exercises and problem-based tasks.
CSI-503 - 11.Distributed Operating Systemghayour abbas
A distributed operating system connects multiple computers via a single communication channel. It allows for the distribution of computing resources and I/O files across several central processors to serve multiple users and real-time applications simultaneously. Distributed operating systems come in various types, including client-server systems, peer-to-peer systems, middleware, three-tier, and n-tier architectures. Their key features are openness, scalability, resource sharing, flexibility, transparency, and heterogeneity. Examples include Solaris, OSF/1, Micros, and DYNIX. Distributed operating systems find applications in network applications, telecommunication networks, parallel computation, and real-time process control.
Embedded System,
Real Time Operating System Concept
Architecture of kernel
Task
Task States
Task scheduler
ISR
Semaphores
Mailbox
Message queues
Pipes
Events
Timers
Memory management
Introduction to Ucos II RTOS
Study of kernel structure of Ucos II
Synchronization in Ucos II
Inter-task communication in Ucos II
Memory management in Ucos II
Porting of RTOS.
The document discusses operating systems and their key functions. It defines an operating system as a program that acts as an intermediary between the user and computer hardware. The main goals of an operating system are to execute user programs, make problem solving easier for users, and efficiently use computer hardware. It also controls low-level components like the CPU, memory, and I/O devices, and coordinates their use among application programs and users.
The document provides an overview of operating system concepts. It defines an operating system as a program that acts as an intermediary between the user and computer hardware, managing resources and running programs. It describes the role of operating systems in virtualizing resources, providing protection and security, managing processes, memory, files, devices and networks. It also discusses different types of operating systems used in various computing environments like desktop systems, parallel systems, distributed systems, and real-time systems.
The document provides an overview of operating system concepts and functions. It discusses that an operating system manages computer hardware resources and provides common services for computer programs. It then describes some key functions of an operating system including memory management, processor management, device management, file management, and other services like security and error detection. The document also covers different types of operating systems such as batch, time-sharing, distributed, network, and real-time operating systems.
Slide Pengantar Teknologi Informasi - Software
Objectives:
Students are able to explain software and hardware function.
Distinguish between operating systems and applications software
List the various methods by which individuals and businesses acquire software
List and briefly describe various types of task-oriented software
Identify the kinds of software available for both large and small businesses
Discuss ethical issues associated with software
The document discusses different types of operating systems:
1. Batch operating systems where users submit jobs offline and jobs are run in batches.
2. Time-sharing operating systems allow multiple users to use a computer simultaneously by quickly switching between users.
3. Distributed operating systems use multiple connected processors to serve real-time applications and users across different locations.
An operating system is software that manages computer resources and provides services to application programs. It sits between the computer hardware and application software. There are three main types of operating systems: stand-alone, network, and embedded. Real-time operating systems (RTOS) are designed for applications with time-critical deadlines like process control. Key features of an RTOS include short and predictable context switching, interrupt handling times, and inter-process communication. Popular RTOS include VxWorks, QNX, and RTLinux.
The document discusses the history and evolution of operating systems from early serial processing systems through batch processing, multiprogramming, and time-sharing systems. It describes how early systems had no operating system, requiring users to reserve computer time slots in advance. Later batch systems used a monitor program to process multiple jobs sequentially. Multiprogramming and time-sharing systems allowed concurrent execution of multiple programs to improve processor utilization but introduced challenges around memory organization and scheduling. The document also discusses system calls and interrupt processing.
FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
We connect Students who have an understanding of course material with Students who need help.
Benefits:-
# Students can catch up on notes they missed because of an absence.
# Underachievers can find peer developed notes that break down lecture and study material in a way that they can understand
# Students can earn better grades, save time and study effectively
Our Vision & Mission – Simplifying Students Life
Our Belief – “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.”
Like Us - https://www.facebook.com/FellowBuddycom
The operating system controls the computer's hardware and software, acting as an interface between applications and hardware. It loads itself into RAM during startup through a bootstrapping process. The operating system manages user accounts, runs programs, allocates memory, controls devices, and performs housekeeping tasks. It uses various interfaces like graphical user interfaces and command line interfaces. Utility programs perform important system tasks like formatting disks, managing files, compressing files, and scanning for viruses. The operating system also manages buffers for temporary data storage, uses interrupts to communicate with devices, performs handshaking for connections, and calculates checksums to check data integrity. It is responsible for file creation, deletion, directories, and mapping files to storage.
The document discusses the system development life cycle (SDLC), which includes requirements, design, implementation, testing, deployment, operations, and maintenance. It describes the typical phases of the SDLC process - preliminary investigation, feasibility study, system analysis, system design, software development, system testing, implementation and evaluation, and maintenance. The waterfall model is presented as a common SDLC approach, with its sequential phases of requirement analysis, system design, implementation, testing, deployment, and maintenance.
This document outlines the syllabus for an Operating Systems course. It covers four modules: evolution of operating systems and process management; process synchronization, threads, concurrency tools, and deadlock prevention; memory management including paging, segmentation, and virtual memory; and file systems including disk scheduling and I/O. The key functions of an operating system are also summarized, including process management, memory management, and file management.
This presentation gives a brief overview of the concept of Operating Systems to the newbies, and helps to familiarize them with some of the most popular operating systems out there and their features.
An operating system manages computer hardware resources and provides common services for computer programs. It acts as an interface between users and hardware and hides hardware complexity. Early operating systems scheduled batch jobs, but modern systems support time-sharing with many simultaneous interactive users through techniques like multiprogramming and CPU scheduling. Distributed operating systems further extend these concepts across networked computers. Real-time operating systems guarantee response times for critical tasks.
An operating system (OS) is software that manages computer hardware and software. Common desktop operating systems include Windows, Mac OS X, and Linux.
This document provides an overview of operating systems. It defines an operating system and describes its main functions like resource sharing and control of application programs. It discusses different OS architectures including monolithic, layered, and microkernel designs. It also describes different types of operating systems such as batch, multiprogramming, multitasking, multi-user, multiprocessing, and real-time operating systems.
This document provides definitions and explanations of key operating system concepts. It begins with defining an operating system as a program that manages computer hardware and acts as an interface between users and hardware. It then lists operating system functions like process management, memory management, and I/O management. The document discusses different types of systems like batch, interactive, time-sharing and real-time systems. It also covers process states, scheduling, and synchronization concepts like critical sections.
CSI-503 - 10. Security & Protection (Operating System) ghayour abbas
The document discusses security and protection in operating systems. It defines security as a mechanism that analyzes users and permits authorized access to system resources through authentication and encryption. Protection deals with controlling access to system resources and determining which files a user can access. The document provides examples of how organizations implement security and protection measures to restrict access to information.
Operating system structures all describe in details.
System Components
Operating System Services
System Calls
System Programs
System Structure
Virtual Machines
System Design and Implementation
The document discusses various topics related to data synchronization in mobile computing systems. It defines data synchronization as maintaining availability and consistency of data across distributed systems. It describes different types of synchronization including two-way synchronization between devices, server-alerted synchronization, one-way server-initiated synchronization, and client-initiated refresh synchronization. It also discusses synchronization software, protocols, mobile device servers, management, file systems, and security considerations.
This course outline describes a fundamentals of operating systems course. The course introduces operating system design and implementation, covering the evolution of operating systems and major components. Key topics include process management, memory management, file systems, and operating system support for distributed systems. The course involves lectures, practical exercises, and assessments including quizzes, tests, laboratory exercises and problem-based tasks.
CSI-503 - 11.Distributed Operating Systemghayour abbas
A distributed operating system connects multiple computers via a single communication channel. It allows for the distribution of computing resources and I/O files across several central processors to serve multiple users and real-time applications simultaneously. Distributed operating systems come in various types, including client-server systems, peer-to-peer systems, middleware, three-tier, and n-tier architectures. Their key features are openness, scalability, resource sharing, flexibility, transparency, and heterogeneity. Examples include Solaris, OSF/1, Micros, and DYNIX. Distributed operating systems find applications in network applications, telecommunication networks, parallel computation, and real-time process control.
Embedded System,
Real Time Operating System Concept
Architecture of kernel
Task
Task States
Task scheduler
ISR
Semaphores
Mailbox
Message queues
Pipes
Events
Timers
Memory management
Introduction to Ucos II RTOS
Study of kernel structure of Ucos II
Synchronization in Ucos II
Inter-task communication in Ucos II
Memory management in Ucos II
Porting of RTOS.
The document discusses operating systems and their key functions. It defines an operating system as a program that acts as an intermediary between the user and computer hardware. The main goals of an operating system are to execute user programs, make problem solving easier for users, and efficiently use computer hardware. It also controls low-level components like the CPU, memory, and I/O devices, and coordinates their use among application programs and users.
The document provides an overview of operating system concepts. It defines an operating system as a program that acts as an intermediary between the user and computer hardware, managing resources and running programs. It describes the role of operating systems in virtualizing resources, providing protection and security, managing processes, memory, files, devices and networks. It also discusses different types of operating systems used in various computing environments like desktop systems, parallel systems, distributed systems, and real-time systems.
Advanced computer architecture lesson 1 and 2Ismail Mukiibi
An OS is a program that controls the execution of application programs and acts as an interface between the user of a computer and the computer hardware. .....................
This is my sort note of operating system.In this note we describe our knowledge for B.Sc level. Student of B.Sc(H) Computer Science this note is good. We describe this note very easy language which the student easily understand.
Operating Systems Structure1- Explain briefly why the objectives o.pdfrishabjain5053
Operating Systems Structure
1- Explain briefly why the objectives of a purely batch multiprogramming operating system
conflict with those of an interactive system.
2- What features from the Mainframe operating system Multics do we see in modern operating
systems?
Solution
Answer 2..
The various features of Multics are :
-Segmented memory
-Virtual memory
-High-level language implementation
-Shared memory multiprocessor
-Multi-language support
-Relational database
-Security
-On-line reconfiguration
-Software engineering
Out of the above features, the feature that are present in modern operating system are:
1) security
Each user has to be authenticated with an username and password (network and multi-user
operating system).
Their data and files will be kept private from other users, unless they choose to make some
shareable with others.
The operating system will only allow administrators (\'super users\') to change parts of the
operating system and install applications.
2)Segmented memory
To use shared memory, we have to perform 2 basic steps:
Request to the operating system a memory segment that can be shared between processes. The
user can create/destroy/open this memory
using a shared memory object: An object that represents memory that can be mapped
concurrently into the address space of more than one process..
Associate a part of that memory or the whole memory with the address space of the calling
process. The operating system looks for
a big enough memory address range in the calling process\' address space and marks that
address range as an special range. Changes in that address
range are automatically seen by other process that also have mapped the same shared memory
object.
3)Virtual memory
Virtual memory is a memory management capability of an OS that uses hardware and software
to allow a computer to compensate for physical memory
shortages by temporarily transferring data from random access memory (RAM) to disk storage.
Virtual address space is increased using active memory
in RAM and inactive memory in hard disk drives (HDDs) to form contiguous addresses that
hold both the application and its data.
4)Shared memory multiprocessor
Shared memory is the fastest interprocess communication mechanism. The operating system
maps a memory segment in
the address space of several processes, so that several processes can read and write in that
memory segment without
calling operating system functions. However, we need some kind of synchronization between
processes that read and write shared memory.
Consider what happens when a server process wants to send an HTML file to a client process
that resides in the same machine using network mechanisms:
The server must read the file to memory and pass it to the network functions, that copy that
memory to the OS\'s internal memory.
The client uses the network functions to copy the data from the OS\'s internal memory to its own
memory.
As we can see, there are two copies, one from memory to the network an.
Introduction to Operating Systems: Function, Evolution, Different Types, Desirable Characteristics and features of an O/S, Operating Systems Services: Types of Services, Different ways of providing these Services – Utility Programs, System Calls.
FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
We connect Students who have an understanding of course material with Students who need help.
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# Students can catch up on notes they missed because of an absence.
# Underachievers can find peer developed notes that break down lecture and study material in a way that they can understand
# Students can earn better grades, save time and study effectively
Our Vision & Mission – Simplifying Students Life
Our Belief – “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.”
Like Us - https://www.facebook.com/FellowBuddycom
4 Module - Operating Systems Configuration and Use by Mark John LadoMark John Lado, MIT
4 Module - Operating Systems Configuration and Use
More on https://www.markjohn.cf/courses
This course will deliberate on the basics of an operating system, which may include Computer Memory, the Operating System, its Graphical User Interface, The Windows Operating System, and Desktop, Operating System Installation.
The document discusses the key components and functions of an operating system:
1. It manages computer hardware resources and allows for the execution of user programs and applications.
2. It provides services like process management, memory management, file management, I/O management, and protection to programs and users.
3. Operating systems provide an interface between the user and computer system through functions like command interpretation.
This document provides an overview of operating systems. It defines an operating system as a program that acts as an interface between the user and computer hardware to control execution of programs. The document then describes key functions of operating systems like memory management, processor management, device management, file management, and security. It also outlines different types of operating systems including batch, time-sharing, distributed, network, and real-time operating systems.
This document discusses an introduction to computer software presented by Yusra Fernando at the Universitas Teknokrat Indonesia Faculty of Economics and Business. It defines software and hardware, and describes the major types of software including system software, application software, open source software, and proprietary software. It also discusses acquiring software, types of application software, and ethical issues related to software.
An operating system is software that acts as an interface between computer hardware and users, allowing applications to run and perform tasks. The main functions of an operating system include process management, memory management, file management, device management, I/O system management, and security. The kernel is the central component of the operating system and enables communication between hardware and software. Mainframe systems evolved from early batch systems with no user interaction to time-sharing systems that allowed for simultaneous multi-user interaction through rapid switching between users.
An operating system manages computer hardware and provides an environment for application programs to run. It acts as an interface between the computer and user, providing graphical or command line interfaces. There are different types of operating systems like real-time, distributed, and embedded operating systems. Key components of an operating system include the kernel, which manages system resources, and processes, which the operating system schedules. Memory, storage, security, and input/output management are also important operating system functions. Popular operating systems include Linux, a free and open-source UNIX-like system, and Windows XP, designed by Microsoft.
This document discusses operating systems and provides details on various topics including processes, threads, computer system structures, and types of operating systems. It defines what an operating system is and its role in managing computer hardware and resources. It also describes different types of operating systems including mainframe systems, desktop systems, real-time systems, and handheld systems. The document discusses concepts like processes, threads, multiprocessing, distributed systems, and client-server models.
The document discusses operating system services and functions. It describes that an operating system manages computer resources, provides services for programmers, and schedules program execution. It then lists and describes key operating system services like program creation, execution, I/O access, file access, error handling, and accounting. The document also discusses how the operating system acts as a resource manager and describes common types of operating systems, scheduling, memory management techniques like swapping and paging, and how logical addresses are mapped to physical addresses.
The document defines and describes various types of operating systems. It begins by defining an operating system and its basic functions such as managing hardware/software resources, providing interfaces between users and computers, and allowing applications to run. It then describes types of operating systems including single-tasking, batch, multitasking, time-sharing, real-time, distributed, and networking operating systems. For each type, it provides an example and brief explanation of its characteristics.
This document provides an overview of different types of operating systems. It begins by defining an operating system and its core functions such as managing resources, memory, storage, and running applications. The major types discussed are batch, real-time, time-sharing, distributed, and network operating systems. For each type, the key characteristics, examples, and advantages/disadvantages are outlined. The document aims to inform readers about the different categories of operating systems and their basic features and purposes.
Interactive operating systems allow users to run interactive programs that accept input from humans. Most popular programs like word processors and spreadsheets are interactive. An interactive OS provides fast turnaround times and immediate feedback while a non-interactive program runs without human input like compilers. Key characteristics of interactive OSs include processor scheduling, memory management, I/O data management, and file management. [/SUMMARY]
This document provides an overview of operating system concepts including system components, operating system services, system programs, system calls, process management, and process states. It describes the four main components of a computer system as hardware, operating system, application programs, and users. It defines key operating system concepts such as multiprogramming, time-sharing, distributed systems, and real-time systems. It also explains process management topics like process states, process control blocks, and context switching.
Bedtime Stories on Operating Systems.pdfAyushBaiswar1
The document provides an overview of processes and process scheduling in operating systems. Some key points:
- A process is a program in execution that is represented by a process control block containing its state, scheduling information, and other data.
- There are three main scheduling queues: job queue, ready queue, and device queues. Scheduling algorithms select processes from the ready queue for CPU execution.
- The main scheduling algorithms discussed are first-come, first-served; shortest job first; and priority scheduling. Shortest job first can increase throughput but requires predicting process lengths.
- Context switching involves saving the state of the current process and loading the next process. The goal of scheduling is to maximize CPU and
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
Use PyCharm for remote debugging of WSL on a Windo cf5c162d672e4e58b4dde5d797...shadow0702a
This document serves as a comprehensive step-by-step guide on how to effectively use PyCharm for remote debugging of the Windows Subsystem for Linux (WSL) on a local Windows machine. It meticulously outlines several critical steps in the process, starting with the crucial task of enabling permissions, followed by the installation and configuration of WSL.
The guide then proceeds to explain how to set up the SSH service within the WSL environment, an integral part of the process. Alongside this, it also provides detailed instructions on how to modify the inbound rules of the Windows firewall to facilitate the process, ensuring that there are no connectivity issues that could potentially hinder the debugging process.
The document further emphasizes on the importance of checking the connection between the Windows and WSL environments, providing instructions on how to ensure that the connection is optimal and ready for remote debugging.
It also offers an in-depth guide on how to configure the WSL interpreter and files within the PyCharm environment. This is essential for ensuring that the debugging process is set up correctly and that the program can be run effectively within the WSL terminal.
Additionally, the document provides guidance on how to set up breakpoints for debugging, a fundamental aspect of the debugging process which allows the developer to stop the execution of their code at certain points and inspect their program at those stages.
Finally, the document concludes by providing a link to a reference blog. This blog offers additional information and guidance on configuring the remote Python interpreter in PyCharm, providing the reader with a well-rounded understanding of the process.
Comparative analysis between traditional aquaponics and reconstructed aquapon...bijceesjournal
The aquaponic system of planting is a method that does not require soil usage. It is a method that only needs water, fish, lava rocks (a substitute for soil), and plants. Aquaponic systems are sustainable and environmentally friendly. Its use not only helps to plant in small spaces but also helps reduce artificial chemical use and minimizes excess water use, as aquaponics consumes 90% less water than soil-based gardening. The study applied a descriptive and experimental design to assess and compare conventional and reconstructed aquaponic methods for reproducing tomatoes. The researchers created an observation checklist to determine the significant factors of the study. The study aims to determine the significant difference between traditional aquaponics and reconstructed aquaponics systems propagating tomatoes in terms of height, weight, girth, and number of fruits. The reconstructed aquaponics system’s higher growth yield results in a much more nourished crop than the traditional aquaponics system. It is superior in its number of fruits, height, weight, and girth measurement. Moreover, the reconstructed aquaponics system is proven to eliminate all the hindrances present in the traditional aquaponics system, which are overcrowding of fish, algae growth, pest problems, contaminated water, and dead fish.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
artificial intelligence and data science contents.pptxGauravCar
What is artificial intelligence? Artificial intelligence is the ability of a computer or computer-controlled robot to perform tasks that are commonly associated with the intellectual processes characteristic of humans, such as the ability to reason.
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Artificial intelligence (AI) | Definitio
1. Subject: REAL TIME OPERATING SYSTEM
UNIT-I )INTRODUCTION TO OS, PROCESS MANAGEMENT
& INTER PROCESS COMMUNICATION.
MEMORY MANAGEMENT, I/O SUBSYSTEM, FILE SYSTEM
ORGANIZATION.
Er. SATEESH KOURAV
2. 1 OPERATING SYSTEM
DEFINITION-An operating system is a program that acts as an interface between the
user and the computer hardware and controls the execution of all kinds of programs.
Functions Of Operating System- important functions of an operating System.
1 Memory Management
2 Processor Management
3 Device Management
4 File Management
5 Security
6Control over system performance
7 Job accounting
8 Error detecting aids
9 Coordination between other software and users
3. 1Memory Management-Memory management refers to management of Primary Memory or
Main Memory. Main memory is a large array of words or bytes where each word or byte has its own
address.
Main memory provides a fast storage that can be accessed directly by the CPU.
2 - Processor Management
In multiprogramming environment, the OS decides which process gets the processor when and
for how much time. This function is called process scheduling. An Operating System does the
following activities for processor management −
Keeps tracks of processor and status of process. The program responsible for this task is known as traffic
controller.
Allocates the processor (CPU) to a process.
De-allocates processor when a process is no longer required.
3-Device Management
An Operating System manages device communication via their respective drivers. It does the
following activities for device management −
Keeps tracks of all devices. Program responsible for this task is known as the I/O controller.
Decides which process gets the device when and for how much time.
Allocates the device in the efficient way.
De-allocates devices.
4 -File Management
A file system is normally organized into directories for easy navigation and usage. These
directories may contain files and other directions.
5Security − By means of password and similar other techniques, it prevents
unauthorized access to programs and data.
6- Control over system performance − Recording delays between
request for a service and response from the system.
7 Job accounting − Keeping track of time and resources used by various jobs and
users.
8Error detecting aids − Production of dumps, traces, error messages, and
other debugging and error detecting aids.
4. 9-Coordination between other softwares and users − Coordination and
assignment of compilers, interpreters, assemblers and other software to the various users of the
Process managemen-Process is the execution of a program
that performs the actions specified in that program. It can be
defined as an execution unit where a program runs. The OS helps
you to create, schedule, and terminates the processes which is
used by CPU. A process created by the main process is called a
child process.
Process operations can be easily controlled with the help of PCB(Process
Control Block). You can consider it as the brain of the process, which
contains all the crucial information related to processing like process id,
priority, state, CPU registers, etc.
Process Architecture
5. Process architecture Image
Here, is an Architecture diagram of the Process
Stack: The Stack stores temporary data like function parameters, returns addresses, and local variables.
Heap Allocates memory, which may be processed during its run time.
Data: It contains the variable.
Text: Text Section includes the current activity, which is represented by the value of the Program Counter.
(3)INTER PROCESS COMMUNICATION (IPC)- inter process communication is a
mechanism which allows processes to communicate each other and synchronize
their actions. the communication between these processes can be seen as a
method of co-operation between them. processes can communicate with each
other using these two
Inter process communication (IPC) is a mechanism which allows
processes to communicate each other and synchronize their actions. The
communication between these processes can be seen as a method of co-
operation between them. Processes can communicate with each other using
these two ways:
1 Shared Memory 2 Message passing
1) Shared Memory Method -There are two processes: Producer and Consumer.
Producer produces some item and Consumer consumes that item. The two processes
shares a common space or memory location known as buffer where the item produced
by Producer is stored and from where the Consumer consumes the item if needed.
There are two version of this problem: first one is known as unbounded buffer problem
in which Producer can keep on producing items and there is no limit on size of buffer,
the second one is known as bounded buffer problem in which producer can produce up
to a certain amount of item and after that it starts waiting for consumer to consume it.
We will discuss the bounded buffer problem. First, the Producer and the Consumer will
share some common memory, then producer will start producing items. If the total
produced item is equal to the size of buffer, producer will wait to get it consumed by the
Consumer.
6. ii) Messaging Passing Method -start our discussion for the
communication between processes via message passing. In this method,
processes communicate with each other without using any kind of shared
memory. If two processes p1 and p2 want to communicate with each other,
they proceed as follow:
Establish a communication link (if a link already exists, no need to
establish it again.)
Start exchanging messages using basic primitives.
We need at least two primitives:
– send(message, destinaion) or send(message)
– receive(message, host) or receive(message)
The message size can be of fixed size or of variable size. if it is of fixed size, it is easy
for OS designer but complicated for programmer and if it is of variable size then it is
easy for programmer but complicated for the OS designer. A standard message can
have two parts: header and body.
The header part is used for storing Message type, destination id, source id, message
length and control information. The control information contains information like what to
do if runs out of buffer space, sequence number, priority. Generally, message is sent
9. MEMORY MANAGEMENT:- Memory management is the process of controlling
and coordinating computer memory, assigning portions called blocks to various running
programs to optimize overall system performance. Memory management resides in
hardware, in the OS (operating system), and in programs and applications.
10. RTOS trends and challenges:- Real-time Operating
Systems (RTOS) are becoming a necessary component that most embedded
software developers need to use in their applications. Developers who were once
traditional bare-metal developers are starting to transition to using an RTOS as their
microcontrollers move to 32-bit architectures and as their devices are starting to
connect to the Internet. Whether you are just starting to use an RTOS or have been
for years, there are several challenges that developers face when using an RTOS.
1 – DECIDING WHEN TO USE AN RTOS:- The first and foremost challenge
that bare-metal developers face is deciding when to use an RTOS. The fact is,
there is a lot that can be done by developers to emulate preemptive scheduling
before needing to make the switch. So, what are a few key indicators that an
RTOS is the right way to go? Below are several questions a developer should
consider:
1 Does the application include a connectivity stack such as USB, WiFi, TCP/IP, etc.?
2 Will the systems time management be simplified by using an RTOS?
3Will application management and maintenance be improved if an RTOS is used?
3 Is deterministic behavior needed?
4 Do program tasks need the ability to preempt each other?
5 Does the MCU have at least 32 kB of code space and 4 kB of RAM?
2– SETTING TASK PRIORITIES-Selecting task priorities can be a challenge. Which task
should have the highest priority? The next highest? Can the tasks even be scheduled? These are
the questions that often come into the minds of developers working with an RTOS. I’ve seen
quite a few developers who simply appear to randomly assign priorities based on how
important they feel the task is. Selecting priorities in this manner is a recipe for disaster.
Developers should start by using rate monotonic scheduling to get a general feel for whether
their periodic tasks can be scheduled successfully. RMS assumes that tasks are periodic and
don’t interact with each other so it only serves as a starting point but can get developers 80% of
the way to the finish line. After that, developers can use trace tools to observe how their system
behaves and make fine tuned adjustments.
3DEBUGGING-Debugging an embedded system is a major challenge. Developers can
spend anywhere from 20% - 80% of their development cycle debugging their
application code with averages typically being around 40%. That is a lot of time
spent debugging. Using an RTOS can complicate debugging. RTOSes can introduce
problems such as priority inversion, dead-lock, and task jitter to name just a few.
Developers who are new to using an RTOS probably don’t realize there are
11. entirely new debugging techniques such as tracing that can be used to debug
their system. These tools can record when tasks start and end execution and
when events occur such as data being placed in a message queue or a mutex
being locked. Tracing tools can even be used to verify that the application is
executing as expected. Needless to say, debugging is a big issue that every
development team is facing and needs to tackle.
4– MANAGING MEMORY-An important challenge for developers is managing memory.
There are several layers to memory management when using an RTOS. First,
developers may need to configure their RTOS to minimize code size if they are
using a resource constrained device. Usually RTOS optimization will require
adjusting the RTOS configuration file to disable features that use a lot of code
space or RAM. Second, developers need to properly manage their RTOS objects
and how they allocate memory in their system. Using the heap and byte pools can
result in non-deterministic behavior along with memory fragmentation. Using the
RTOS default stack size can result in using too much RAM, or worse, a stack
overflow. These issues can be solved by performing a worst case stack analysis
and by using block memory pools, but that doesn’t make the issues trivial.
5– THE LEARNING CURVE-Developers who are switching from bare-metal coding
techniques into an RTOS environment often struggle with learning about RTOSes.
There are a lot of great materials on the web and in books that give ideas about
the major RTOS objects and how to use them, but having a theoretical knowledge
of an RTOS application is one thing. Designing and implementing a real application
and fighting through all the nuances and issues is another. Developers making the
transition should pick up their favorite development kit, a port of the RTOS they
are interested in, and then start designing something simple in order to stretch
their legs and shrink the learning curve.
Conclusion-Whether you are new to using an RTOS or are a seasoned veteran, as
developers we face very similar challenges when designing and implementing our
RTOS-based applications. As system complexity increases, the need to be an
expert at using an RTOS is going to be a requirement for every embedded
software engineer.