![Lecture 3](http://s1.studyres.com/store/data/008426523_1-e8dad6fed6db456561fb07aca669d97a-300x300.png)
Lecture 3
... I/O operations - A running program may require I/O, which may involve a file or an I/O device. File-system manipulation - The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file ...
... I/O operations - A running program may require I/O, which may involve a file or an I/O device. File-system manipulation - The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file ...
Memory Management
... Batch: Jobs are queued or ‘spooled’ waiting to be processed. Examples of Batch Processing: JCL: IBM's Job Control Language UNIX Shell Command File: List of commands are executed from a file Shell: Command interpreter processes each command (in file or at command prompt). Includes programming l ...
... Batch: Jobs are queued or ‘spooled’ waiting to be processed. Examples of Batch Processing: JCL: IBM's Job Control Language UNIX Shell Command File: List of commands are executed from a file Shell: Command interpreter processes each command (in file or at command prompt). Includes programming l ...
Operating System
... Spooling is an acronym for simultaneous peripheral operations on line. Spooling refers to putting data of various I/O jobs in a buffer. This buffer is a special area in memory or hard disk which is accessible to I/O devices. Operating system does the following activites related to distributed enviro ...
... Spooling is an acronym for simultaneous peripheral operations on line. Spooling refers to putting data of various I/O jobs in a buffer. This buffer is a special area in memory or hard disk which is accessible to I/O devices. Operating system does the following activites related to distributed enviro ...
Unit OS1: The Evolution of Operating Systems
... Single user Multiuser/Timesharing Systems Management of multiple simultaneous users interconnected via terminals Fair resource management: CPU scheduling, spooling, mutual exclusion Real-Time Systems (process control systems) Management of time-critical processes High requirements with respect to re ...
... Single user Multiuser/Timesharing Systems Management of multiple simultaneous users interconnected via terminals Fair resource management: CPU scheduling, spooling, mutual exclusion Real-Time Systems (process control systems) Management of time-critical processes High requirements with respect to re ...
Lecture Notes - UCLA Computer Science
... through the interrupt vector, addresses of all the service routines Interrupt handler preserves the state of the CPU by storing registers, the ...
... through the interrupt vector, addresses of all the service routines Interrupt handler preserves the state of the CPU by storing registers, the ...
Operating Systems
... For batch processing, a user asks the shell to run a special type of program called “script” to execute a sequence of programs For interactive processing, a user uses a keyboard, a mouse, and tablets, etc. to issue commands to the shell and input data into a computer ...
... For batch processing, a user asks the shell to run a special type of program called “script” to execute a sequence of programs For interactive processing, a user uses a keyboard, a mouse, and tablets, etc. to issue commands to the shell and input data into a computer ...
Lecture 4: September 11 4.1 Processes 4.2 Memory and Secondary
... processes may be associated with the same program; for example, opening up several windows of the same program typically means more than one process is being executed. In the computing world, processes are formally defined by the operating system(s)(OS) running them and so may differ in detail from ...
... processes may be associated with the same program; for example, opening up several windows of the same program typically means more than one process is being executed. In the computing world, processes are formally defined by the operating system(s)(OS) running them and so may differ in detail from ...
CS323 - Operating Systems
... Having successfully completed this course, the student will be able to: 1. Develop an appreciation of operating system operation, design and implementation. 2. Recognize and memorize the fundamentals and features of modern operating systems. 3. Distinguish between different types of operating sys ...
... Having successfully completed this course, the student will be able to: 1. Develop an appreciation of operating system operation, design and implementation. 2. Recognize and memorize the fundamentals and features of modern operating systems. 3. Distinguish between different types of operating sys ...
Deployment of Sensing Devices on Critical Infrastructure
... – Provides user interface ...as we saw. – Allows applications to run. – What are some tasks you need done even when no apps are running? – Does nearly half of what we ask an application program to do! • Common tasks useful to all programs —put those in the OS (the most basic are put in BIOS) so each ...
... – Provides user interface ...as we saw. – Allows applications to run. – What are some tasks you need done even when no apps are running? – Does nearly half of what we ask an application program to do! • Common tasks useful to all programs —put those in the OS (the most basic are put in BIOS) so each ...
Lecture 5 - Rabie A. Ramadan
... – Provides user interface ...as we saw. – Allows applications to run. – What are some tasks you need done even when no apps are running? – Does nearly half of what we ask an application program to do! • Common tasks useful to all programs —put those in the OS (the most basic are put in BIOS) so each ...
... – Provides user interface ...as we saw. – Allows applications to run. – What are some tasks you need done even when no apps are running? – Does nearly half of what we ask an application program to do! • Common tasks useful to all programs —put those in the OS (the most basic are put in BIOS) so each ...
N4Less11
... Applications and the Interface • Applications designed to run under one operating system use similar interface elements. • Under an OS such as Windows, you see a familiar interface no matter what programs you use. • In a GUI, each program opens and runs in a separate window—a frame that presents the ...
... Applications and the Interface • Applications designed to run under one operating system use similar interface elements. • Under an OS such as Windows, you see a familiar interface no matter what programs you use. • In a GUI, each program opens and runs in a separate window—a frame that presents the ...
Final Report
... The file system simulator imitates a UNIX file system but requires that the user execute all the individual classes from the console and input all the information. The deadlock detection simulator requires input file that describe the processes and will not run if it can not find those individual fi ...
... The file system simulator imitates a UNIX file system but requires that the user execute all the individual classes from the console and input all the information. The deadlock detection simulator requires input file that describe the processes and will not run if it can not find those individual fi ...
Sai Uday Kiran Ravi`s presentation on Application Security on
... from the operating system in that VM. Mechanism behind Overshadow: Controls memory mappings to present different views of memory pages depending on the execution context. When an application accesses its own memory, access ...
... from the operating system in that VM. Mechanism behind Overshadow: Controls memory mappings to present different views of memory pages depending on the execution context. When an application accesses its own memory, access ...
introduction to operating system
... in memory and on disk (the CPU is allocated to a job only if the job is in memory). The CPU is switched among multiple jobs so frequently that the users may interact with each program during execution. On-line communication between the user and the system is provided; when the operating system fin ...
... in memory and on disk (the CPU is allocated to a job only if the job is in memory). The CPU is switched among multiple jobs so frequently that the users may interact with each program during execution. On-line communication between the user and the system is provided; when the operating system fin ...
ppt
... • Operating system failure can generate crash dump file containing kernel memory • Beyond crashes, performance tuning can optimize system performance • Kernighan’s Law: “Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you ar ...
... • Operating system failure can generate crash dump file containing kernel memory • Beyond crashes, performance tuning can optimize system performance • Kernighan’s Law: “Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you ar ...
Operating System Structures
... System programs provide a convenient environment for program development and execution ...
... System programs provide a convenient environment for program development and execution ...
Operating Systems Overview
... programs to share information. • You can create data in one program and use it again in other programs without re-creating it. • Windows provides the Clipboard, a special area that stores data cut or copied from one document, so you can re-use it elsewhere. ...
... programs to share information. • You can create data in one program and use it again in other programs without re-creating it. • Windows provides the Clipboard, a special area that stores data cut or copied from one document, so you can re-use it elsewhere. ...
Module 3: Operating
... • The program that reads and interprets control statements is called variously: – control-card interpreter – command-line interpreter – shell (in UNIX) Its function is to get and execute the next command statement. Operating System Services • Program execution – system capability to load a program i ...
... • The program that reads and interprets control statements is called variously: – control-card interpreter – command-line interpreter – shell (in UNIX) Its function is to get and execute the next command statement. Operating System Services • Program execution – system capability to load a program i ...
COS 318: Operating Systems Overview
... built that were compatible u Single OS to run on all (IBM OS/360): big and bloated u Key innovation: multiprogramming u What happens when a job is waiting on I/O u What if jobs spend a lot of the time waiting on I/O? u ...
... built that were compatible u Single OS to run on all (IBM OS/360): big and bloated u Key innovation: multiprogramming u What happens when a job is waiting on I/O u What if jobs spend a lot of the time waiting on I/O? u ...
lec1
... An entity that can be assigned to and executed on a processes, It is a unit of work. Multiprogramming, time-sharing and real-time transaction systems lead to the refinement of the concept of process. A process can be defined by its attributes and behaviors : it can be viewed as an Abstract Data Type ...
... An entity that can be assigned to and executed on a processes, It is a unit of work. Multiprogramming, time-sharing and real-time transaction systems lead to the refinement of the concept of process. A process can be defined by its attributes and behaviors : it can be viewed as an Abstract Data Type ...
Operating Systems Operating System Component and Structure
... • File system: a convenient abstraction – defines logical objects like files and directories • hides details about where on disk files live – as well as operations on objects like read and write • read/write byte ranges instead of blocks ...
... • File system: a convenient abstraction – defines logical objects like files and directories • hides details about where on disk files live – as well as operations on objects like read and write • read/write byte ranges instead of blocks ...
(MSWindows, LINUX, UNIX) (China)
... Initially designed for medium-sized minicomputers, and then moved to mainframe computers and personal computers. ...
... Initially designed for medium-sized minicomputers, and then moved to mainframe computers and personal computers. ...
basic-os-concepts
... kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. On-line communication between the user and the system is provided; when the operating system finishes the execution of one command, it seeks the next “control stat ...
... kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. On-line communication between the user and the system is provided; when the operating system finishes the execution of one command, it seeks the next “control stat ...
OS 2200
![](https://commons.wikimedia.org/wiki/Special:FilePath/OS_2200_Software_Genealogy.png?width=300)
OS 2200 is the operating system for the Unisys ClearPath Dorado family of mainframe systems. The operating system kernel of OS 2200 is a lineal descendant of Exec 8 for the UNIVAC 1108. Documentation and other information on current and past Unisys systems can be found on the Unisys public support website.See Unisys 2200 Series system architecture for a description of the machine architecture and its relationship to the OS 2200 operating system.