Overview of Operating Systems
... ❚ Represent programs (source/object forms) and data ❚ Operating system responsibilities Ø File creation and deletion Ø Directory creation and deletion Ø Support of primitives for manipulating files and directories Ø Mapping files onto secondary storage Ø File backup on stable (non-volatile) s ...
... ❚ Represent programs (source/object forms) and data ❚ Operating system responsibilities Ø File creation and deletion Ø Directory creation and deletion Ø Support of primitives for manipulating files and directories Ø Mapping files onto secondary storage Ø File backup on stable (non-volatile) s ...
PDF
... Creates L4 threads for its user processes Maps parts of its address space to user process threads (using L4 primitives) Acts as pager thread for its user threads Has its own logical page table Multiplexes its own single thread (to avoid having to change Linux source code) ...
... Creates L4 threads for its user processes Maps parts of its address space to user process threads (using L4 primitives) Acts as pager thread for its user threads Has its own logical page table Multiplexes its own single thread (to avoid having to change Linux source code) ...
Homework: OS Organization
... paper describes the exokernel organization. The JOS operating system you are building in the labs is organized like an exokernel. Submit: In lab 4 you completed building the core of an exokernel-based operating system. In class you studied xv6, a monolithic operating systems. Both are intend to supp ...
... paper describes the exokernel organization. The JOS operating system you are building in the labs is organized like an exokernel. Submit: In lab 4 you completed building the core of an exokernel-based operating system. In class you studied xv6, a monolithic operating systems. Both are intend to supp ...
lec02
... Interrupts, exceptions, system calls, etc. Respond to external events CPU requires software intervention to handle fault or trap ...
... Interrupts, exceptions, system calls, etc. Respond to external events CPU requires software intervention to handle fault or trap ...
FILE
... The second subject of this lecture is modern "program development environment" and program development productivity. All the modern source codes are stored and distributed in tens and hundreds of directories and files. All these files are combined and linked to make one executable file. Modern compu ...
... The second subject of this lecture is modern "program development environment" and program development productivity. All the modern source codes are stored and distributed in tens and hundreds of directories and files. All these files are combined and linked to make one executable file. Modern compu ...
Downlaod File
... Hardware may trigger an interrupt at any time by sending a signal to the CPU, usually by way of the system bus. Software may trigger an interrupt by executing a special operation called a system call. When the CPU is interrupted, it stops what it is doing and immediately transfers execution to a fix ...
... Hardware may trigger an interrupt at any time by sending a signal to the CPU, usually by way of the system bus. Software may trigger an interrupt by executing a special operation called a system call. When the CPU is interrupted, it stops what it is doing and immediately transfers execution to a fix ...
lecture33-dec15
... • Key abstractions provided by the OS – Process • Related: threads, address space/virtual memory ...
... • Key abstractions provided by the OS – Process • Related: threads, address space/virtual memory ...
OPERATING-SYSTEM
... IT occurs when a group of processes each have granted exclusive access to some resources,and each one wants yet another resources that belongs to another process in the group. all of them are blocked and none will ever run again. ...
... IT occurs when a group of processes each have granted exclusive access to some resources,and each one wants yet another resources that belongs to another process in the group. all of them are blocked and none will ever run again. ...
Chapter 2 – Operating System Overview
... intervals, but due to relatively slow human reaction time this occurrence is usually transparent to the user. 9. T / F – A process can be defined as a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources. 10. T / F – A ...
... intervals, but due to relatively slow human reaction time this occurrence is usually transparent to the user. 9. T / F – A process can be defined as a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources. 10. T / F – A ...
1. design principle
... The past few decades have seen a tremendous improvement on the design and performance of operating systems. However the fundamental services provided by an operating system remain the same. First they make computer hardware easier to use. Second the operating systems shares the resources among the d ...
... The past few decades have seen a tremendous improvement on the design and performance of operating systems. However the fundamental services provided by an operating system remain the same. First they make computer hardware easier to use. Second the operating systems shares the resources among the d ...
ITS 225 (Operating Systems) Lecture Notes
... the requested device. – If legal, executes (or queues) the request then flips the mode bit back to user mode. ...
... the requested device. – If legal, executes (or queues) the request then flips the mode bit back to user mode. ...
Components of an operating system
... computer systems are sold with an operating system installed. Computers that are designed for individual users are called Personal Computers (PCs). PC operating systems are designed to control the operations of programs such as Web browsers, word processors, and e-mail programs Computers that are ca ...
... computer systems are sold with an operating system installed. Computers that are designed for individual users are called Personal Computers (PCs). PC operating systems are designed to control the operations of programs such as Web browsers, word processors, and e-mail programs Computers that are ca ...
Here is the Original File
... AIX was designed for the IBM 6150 RT and was initially used on the IBM RS/6000, POWER and PowerPC-based systems, IBM System I, System/370 mainframes, PS/2 personal computers, and the Apple Network Server. AIX is one of five operating system that have versions certified to The Open Group's UNIX 03 st ...
... AIX was designed for the IBM 6150 RT and was initially used on the IBM RS/6000, POWER and PowerPC-based systems, IBM System I, System/370 mainframes, PS/2 personal computers, and the Apple Network Server. AIX is one of five operating system that have versions certified to The Open Group's UNIX 03 st ...
UNIX Software Tools
... an email system) the software on the local host is the client and the software on the remote host is the server. In a X-Windows system this is reversed. The X-Windows server is on your local machine. It provides the following services: keyboard input, mouse, procedures for drawing on the screen, ...
... an email system) the software on the local host is the client and the software on the remote host is the server. In a X-Windows system this is reversed. The X-Windows server is on your local machine. It provides the following services: keyboard input, mouse, procedures for drawing on the screen, ...
Operating Systems Operating System (OS) CS 217
... user cannot execute privileged instructions users must ask OS to execute them - system calls system calls are often implemented using traps OS gains control through trap, switches to supervisor model, performs service, switches back to user mode, and gives control back to user ...
... user cannot execute privileged instructions users must ask OS to execute them - system calls system calls are often implemented using traps OS gains control through trap, switches to supervisor model, performs service, switches back to user mode, and gives control back to user ...
lecture4
... execute it or directly copy the kernel image into RAM. Assuming that a Linux kernel image must be booted, the LILO boot loader, which relies on BIOS routines, performs essentially the same operations as the boot loader integrated into the kernel image described in the previous section about ...
... execute it or directly copy the kernel image into RAM. Assuming that a Linux kernel image must be booted, the LILO boot loader, which relies on BIOS routines, performs essentially the same operations as the boot loader integrated into the kernel image described in the previous section about ...
Module 3: Operating
... permits no direct sharing of resources. • A virtual machine system is a perfect vehicle for operating systems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. • The virtual machine concept i ...
... permits no direct sharing of resources. • A virtual machine system is a perfect vehicle for operating systems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. • The virtual machine concept i ...
The Mach System
... - A microkernel is physically divided into separate modules. It may consist of 1 or more layers – but only logically. - A layered kernel is physically divided into layers, but logically – it might consist of one or more modules. - A microkernel may be (and often is) logically single layered because ...
... - A microkernel is physically divided into separate modules. It may consist of 1 or more layers – but only logically. - A layered kernel is physically divided into layers, but logically – it might consist of one or more modules. - A microkernel may be (and often is) logically single layered because ...
Operating System
... When Operating Systems didn’t Exist • technological capabilities • Individual Programs • One person used the computer at a time • “Job Scheduling” • Libraries 1st procedure ...
... When Operating Systems didn’t Exist • technological capabilities • Individual Programs • One person used the computer at a time • “Job Scheduling” • Libraries 1st procedure ...
Test1: Spring 2017 (Hint)
... of time on a PC would take often a fraction of the time on a time-sharing system even with context switching. Therefore, for large time consuming compute bound processes it would be better to run them on a time-sharing system. Or, Q4B. Describe the differences among the short-term, medium term and l ...
... of time on a PC would take often a fraction of the time on a time-sharing system even with context switching. Therefore, for large time consuming compute bound processes it would be better to run them on a time-sharing system. Or, Q4B. Describe the differences among the short-term, medium term and l ...
university of helsinki 24.8.2001
... In a multiprogramming environment the applications are not allowed to mess each other and they are not allowed to use resources not owned by themselves without given permissions. To implement a multiprogramming operating system certain hardware level features are desirable. Explain what kind of supp ...
... In a multiprogramming environment the applications are not allowed to mess each other and they are not allowed to use resources not owned by themselves without given permissions. To implement a multiprogramming operating system certain hardware level features are desirable. Explain what kind of supp ...
CSE 5431 (Approved): Systems II: Introduction to Operating Systems
... Be familiar with process control blocks, system calls, context switching, interrupts, and exception control flows. Be familiar with process synchronization, inter-process communication, and threads. Be familiar with multi-threaded programming. Be familiar with file systems and disk scheduling algori ...
... Be familiar with process control blocks, system calls, context switching, interrupts, and exception control flows. Be familiar with process synchronization, inter-process communication, and threads. Be familiar with multi-threaded programming. Be familiar with file systems and disk scheduling algori ...
The Evolution of Operating Systems
... operating systems is the distinction between a program and the activity of executing a program.” – A program -- a static set of directions – A process -- the dynamic activity of the machine whose properties change as time progresses. At any particular time the current status of the activity is calle ...
... operating systems is the distinction between a program and the activity of executing a program.” – A program -- a static set of directions – A process -- the dynamic activity of the machine whose properties change as time progresses. At any particular time the current status of the activity is calle ...