Ch2 OS Structures 1
... delete them, search them, list file Information, permission management. – Communications – Processes may exchange information, on the same computer or between computers over a network • via shared memory or through message passing (packets moved by the OS) – Error detection – OS needs to be consta ...
... delete them, search them, list file Information, permission management. – Communications – Processes may exchange information, on the same computer or between computers over a network • via shared memory or through message passing (packets moved by the OS) – Error detection – OS needs to be consta ...
Tutorail-two-with
... kept only where it is needed and is accessible only within a defined and restricted area, so any bugs affecting that data must be limited to a specific module or layer. ...
... kept only where it is needed and is accessible only within a defined and restricted area, so any bugs affecting that data must be limited to a specific module or layer. ...
BA471 Management Information Systems
... Use and monitor memory Initiate, terminate, monitor processing Provide network functions Control access Manage files ...
... Use and monitor memory Initiate, terminate, monitor processing Provide network functions Control access Manage files ...
Slide 1
... Operating Systems Multitasking: Multitasking is allowed as the OS swaps each program in and out of memory in turn when needed. The program not being used is temporarily stored on the backing storage until needed again. ...
... Operating Systems Multitasking: Multitasking is allowed as the OS swaps each program in and out of memory in turn when needed. The program not being used is temporarily stored on the backing storage until needed again. ...
Lec01b-OS Overview
... • “The one program running at all times on the computer” is the kernel. • Everything else is either ...
... • “The one program running at all times on the computer” is the kernel. • Everything else is either ...
2.1 Input Output Control System
... enable a user to create files, assign meaningful name and specify how the files to be shared with others users of the system ...
... enable a user to create files, assign meaningful name and specify how the files to be shared with others users of the system ...
Operating Systems
... In Batch processing same type of jobs batch (BATCH- a set of jobs with similar needs) together and execute at a time. The OS was simple, its major task was to transfer control from one job to the next. The job was submitted to the computer operator in form of punch cards. At some later time the outp ...
... In Batch processing same type of jobs batch (BATCH- a set of jobs with similar needs) together and execute at a time. The OS was simple, its major task was to transfer control from one job to the next. The job was submitted to the computer operator in form of punch cards. At some later time the outp ...
History of Operating Systems
... The use of integrated circuits dramatically improved computer speeds. Batch systems ran “continuously”, but only one job at a time. If a job was paused (to execute an IO process) the CPU was idle, if only for a few milliseconds. The same philosophy that led to 2nd generation systems held - how to ma ...
... The use of integrated circuits dramatically improved computer speeds. Batch systems ran “continuously”, but only one job at a time. If a job was paused (to execute an IO process) the CPU was idle, if only for a few milliseconds. The same philosophy that led to 2nd generation systems held - how to ma ...
Operating Systems
... OS - Different modes of processing • Interactive • Accepting input from a human. • Interactive computer systems are programs that allow users to enter data or commands. • Most popular programs, such as word processors and spreadsheet applications, are interactive. • In interactive processing, the a ...
... OS - Different modes of processing • Interactive • Accepting input from a human. • Interactive computer systems are programs that allow users to enter data or commands. • Most popular programs, such as word processors and spreadsheet applications, are interactive. • In interactive processing, the a ...
document
... • A File system which treats I/O devices as special cases of files. • Re-direction of I/O • Although the earliest version of Unix supported only a single user, that user could run multiple concurrent processes. Additionally the shell and the system supported the ability of for the output stream of o ...
... • A File system which treats I/O devices as special cases of files. • Re-direction of I/O • Although the earliest version of Unix supported only a single user, that user could run multiple concurrent processes. Additionally the shell and the system supported the ability of for the output stream of o ...
Introduction To Operating Systems
... A user program can’t use arbitrary amount of memory. A user program can’t access data belonging to the operating system or other user programs. • How to achieve memory protection? Indirect memory access: memory access with a virtual address which needs to be translated into physical address. ...
... A user program can’t use arbitrary amount of memory. A user program can’t access data belonging to the operating system or other user programs. • How to achieve memory protection? Indirect memory access: memory access with a virtual address which needs to be translated into physical address. ...
LECT03
... o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
... o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
File management
... Sending programs to the CPU Allocating primary storage (RAM) to programs Controlling devices that programs requires ...
... Sending programs to the CPU Allocating primary storage (RAM) to programs Controlling devices that programs requires ...
Chapter 02: Operating System Overview
... – Associated data needed by the program – Execution context of the program • All information the operating system needs to manage the process ...
... – Associated data needed by the program – Execution context of the program • All information the operating system needs to manage the process ...
Operating Systems (OS)
... coordination between processes (semaphores, shared memory, message passing, input/output redirection, pipes,…), including deadlock avoidance and recovery Thread – flow of control between processes; a process can spawn daughter processes and so on shares process resources ...
... coordination between processes (semaphores, shared memory, message passing, input/output redirection, pipes,…), including deadlock avoidance and recovery Thread – flow of control between processes; a process can spawn daughter processes and so on shares process resources ...
IOS101
... Single-User Multi-process Allows one user at a time Allows multiple processes to run simultaneously E.g. OS/2, Win95/98, WinNT workstation ...
... Single-User Multi-process Allows one user at a time Allows multiple processes to run simultaneously E.g. OS/2, Win95/98, WinNT workstation ...
Evolution of Operating System
... o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
... o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
Operating System Overview
... – Associated data needed by the program – Execution context of the program • All information the operating system needs to manage the process ...
... – Associated data needed by the program – Execution context of the program • All information the operating system needs to manage the process ...
Operating Systems
... – Associated data needed by the program – Execution context of the program • All information the operating system needs to manage the process ...
... – Associated data needed by the program – Execution context of the program • All information the operating system needs to manage the process ...
Operating System - Linux - Home Pages of People@DU
... Processing ◦ Uni processing ◦ Multi processing ...
... Processing ◦ Uni processing ◦ Multi processing ...
Chapter 2 – Operating System Overview
... 8. T / F – In a time sharing system, a user’s program is preempted at regular 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 executi ...
... 8. T / F – In a time sharing system, a user’s program is preempted at regular 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 executi ...
OS 2200
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.