Chapter 3: Operating Systems
... Operating System Components Shell: Communicates with users, provides access to the services of a kernel Text based Graphical user interface (GUI) Kernel: Performs basic required functions File manager Device drivers Memory manager Scheduler and dispatcher DM526 Operating Systems ...
... Operating System Components Shell: Communicates with users, provides access to the services of a kernel Text based Graphical user interface (GUI) Kernel: Performs basic required functions File manager Device drivers Memory manager Scheduler and dispatcher DM526 Operating Systems ...
No Slide Title
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible (until 2.4) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has ...
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible (until 2.4) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has ...
PPTX - Duke Computer Science
... other programs. The reference monitor has a guard that checks all requests against an access control policy before permitting them to execute. ...
... other programs. The reference monitor has a guard that checks all requests against an access control policy before permitting them to execute. ...
The Linux System
... 1. Normal kernel code is nonpreemptible (until 2.4) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed and control is about to be returned to user mo ...
... 1. Normal kernel code is nonpreemptible (until 2.4) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed and control is about to be returned to user mo ...
The Linux System 21.2 Silberschatz, Galvin and Gagne ©2009
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible (until 2.4) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has ...
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible (until 2.4) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has ...
Operating Systems (G53OPS) - Examination Question 1 Operating
... Interrupt handlers should be deeply hidden in the operating system, since treating interrupts in a correct way is tricky and can cause serious system errors when done incorrectly. The interrupt handlers may communicate with the device handlers through the use of classical synchronisation techniques ...
... Interrupt handlers should be deeply hidden in the operating system, since treating interrupts in a correct way is tricky and can cause serious system errors when done incorrectly. The interrupt handlers may communicate with the device handlers through the use of classical synchronisation techniques ...
2000 - 2001
... Disks may differ in sector size. The OS should offer one block size and the device independent software must do the translation. This is related to the concept of buffering. Buffers are used with block and character devices to bridge processing speed differences. The assignment of blocks, and the ma ...
... Disks may differ in sector size. The OS should offer one block size and the device independent software must do the translation. This is related to the concept of buffering. Buffers are used with block and character devices to bridge processing speed differences. The assignment of blocks, and the ma ...
Migration
... to be saved to a file (much like a persistent object) and then a new process to be created (restored) based on this checkpoint file. This checkpoint file contains all of the "goods" including the kernel material. Univ. of Tehran ...
... to be saved to a file (much like a persistent object) and then a new process to be created (restored) based on this checkpoint file. This checkpoint file contains all of the "goods" including the kernel material. Univ. of Tehran ...
device special files
... • A primary function of any OS is to provide basic I/O support for application software – To translate requests from software into commands that the hardware can understand and carry out ...
... • A primary function of any OS is to provide basic I/O support for application software – To translate requests from software into commands that the hardware can understand and carry out ...
CSC420 สัปดาห์ที่ 2
... as a temporary storage area for all output until printer is ready to accept it (spooling). • If printer needs all of a job's output before it will begin printing, but spooling system fills available disk space with only partially completed output, then a deadlock can occur. Understanding Operating S ...
... as a temporary storage area for all output until printer is ready to accept it (spooling). • If printer needs all of a job's output before it will begin printing, but spooling system fills available disk space with only partially completed output, then a deadlock can occur. Understanding Operating S ...
Operating Systems and File Management
... Boot and Recovery Disks • You can create a custom recovery CD that contains your computer’s current settings and device drivers • Norton Ghost is a product of Symantec, which also provides a more specialized recovery disk called the Symantec Recovery Disk • Certain PC manufacturers have pre-install ...
... Boot and Recovery Disks • You can create a custom recovery CD that contains your computer’s current settings and device drivers • Norton Ghost is a product of Symantec, which also provides a more specialized recovery disk called the Symantec Recovery Disk • Certain PC manufacturers have pre-install ...
7.3. Computer System Structures
... In MS-DOS, the interfaces and levels of functionality are not well separated. For instance, application programs are able to access the basic I/O routines to write directly to the display and disk drives. Such freedom leaves MS-DOS vulnerable to errant (or malicious) programs, causing entire system ...
... In MS-DOS, the interfaces and levels of functionality are not well separated. For instance, application programs are able to access the basic I/O routines to write directly to the display and disk drives. Such freedom leaves MS-DOS vulnerable to errant (or malicious) programs, causing entire system ...
Patterns for Operating Systems Access Control
... Operating systems are fundamental to provide security to computing systems. The operating system supports the execution of applications and any security constraints defined at that level must be enforced by the operating system. The operating system must also protect itself because compromise would ...
... Operating systems are fundamental to provide security to computing systems. The operating system supports the execution of applications and any security constraints defined at that level must be enforced by the operating system. The operating system must also protect itself because compromise would ...
Midterm1-su13
... First question e) Where was the first operating system with a graphical user interface developed? ...
... First question e) Where was the first operating system with a graphical user interface developed? ...
Are Virtual Machine Monitors Microkernels Done Right? Evangelos Kotsovinos, Dan Magenheimer
... VMM as an application inside a host Linux system. Additionally, several research systems do not fall cleanly into either the VMM or microkernel camps; for example both Exokernel [14] and Nemesis [15] provide low-level interfaces and resource protection above a small trusted kernel, but without the f ...
... VMM as an application inside a host Linux system. Additionally, several research systems do not fall cleanly into either the VMM or microkernel camps; for example both Exokernel [14] and Nemesis [15] provide low-level interfaces and resource protection above a small trusted kernel, but without the f ...
AIX is building momentum as the leading, UNIX operating system for
... A file system is a hierarchical structure (file tree) of files and directories. This type of structure resembles an inverted tree with the roots at the top and branches at the bottom. This file tree uses directories to organize data and programs into groups, allowing the management of several direct ...
... A file system is a hierarchical structure (file tree) of files and directories. This type of structure resembles an inverted tree with the roots at the top and branches at the bottom. This file tree uses directories to organize data and programs into groups, allowing the management of several direct ...
Chapter 6 Operating Systems
... While in case the operating system allows the execution of multiple tasks at one time, it is classified as a multi-tasking operating system. ...
... While in case the operating system allows the execution of multiple tasks at one time, it is classified as a multi-tasking operating system. ...
Migration
... to be saved to a file (much like a persistent object) and then a new process to be created (restored) based on this checkpoint file. This checkpoint file contains all of the "goods" including the kernel material. Univ. of Tehran ...
... to be saved to a file (much like a persistent object) and then a new process to be created (restored) based on this checkpoint file. This checkpoint file contains all of the "goods" including the kernel material. Univ. of Tehran ...
System Call
... Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and address of block p ...
... Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and address of block p ...
Chapter 2: Operating
... I/O operations - A running program may require I/O, which may involve a file or an I/O device. ...
... I/O operations - A running program may require I/O, which may involve a file or an I/O device. ...
2.01
... Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and address of block p ...
... Exact type and amount of information vary according to OS and call Three general methods used to pass parameters to the OS Simplest: pass the parameters in registers In some cases, may be more parameters than registers Parameters stored in a block, or table, in memory, and address of block p ...
ppt
... • Task assigned to child is no longer required. • Parent is exiting – OS does not allow child to continue if parent terminates – Cascading termination Principles of Operating Systems I/O Structures and Storage ...
... • Task assigned to child is no longer required. • Parent is exiting – OS does not allow child to continue if parent terminates – Cascading termination Principles of Operating Systems I/O Structures and Storage ...
Using Linux Kernel Modules For Operating Systems Class Projects
... The second project is to write a program that reports the behavior of the system from the various files in the /proc file system. This project establishes an understanding of /proc files which are used in the kernel module projects. This is Lab 3.1 as described in Nutt's text book.7 The third projec ...
... The second project is to write a program that reports the behavior of the system from the various files in the /proc file system. This project establishes an understanding of /proc files which are used in the kernel module projects. This is Lab 3.1 as described in Nutt's text book.7 The third projec ...
Best algorithms + best computers = powerful match
... techniques1 to emulate shared memory for multithreaded applications. Since this emulation is implemented in user space, applications can freely customize it, and runtime bugs cannot compromise the kernel’s guarantee of determinism. Rather than emulating conventional parallel memory models, Determin ...
... techniques1 to emulate shared memory for multithreaded applications. Since this emulation is implemented in user space, applications can freely customize it, and runtime bugs cannot compromise the kernel’s guarantee of determinism. Rather than emulating conventional parallel memory models, Determin ...
Plan 9 from Bell Labs
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Plan 9 from Bell Labs is a distributed operating system, originally developed by the Computing Sciences Research Center at Bell Labs between the mid-1980s and 2002. It takes some of the principles of Unix, developed in the same research group, but extends these to a networked environment with graphics terminals.In Plan 9, virtually all computing resources, including files, network connections, and peripheral devices, are represented through the file system rather than specialized interfaces. A unified network protocol called 9P ties a network of computers running Plan 9 together, allowing them to share all resources so represented.The name Plan 9 from Bell Labs is a reference to the Ed Wood 1959 cult science fiction Z-movie Plan 9 from Outer Space. Also, Glenda, the Plan 9 Bunny, is presumably a reference to Wood's film Glen or Glenda. The system continues to be used and developed by operating system researchers and hobbyists.