ch16
... Each valid PTE points to a 4 KB page frame in physical memory. Invalid PTEs are used by the OS to find pages on disk A 9-bit integer can represent all the values form 0 to 511, therefore, can select any entry in the page directory, or in a page table. This property is used when translating a ...
... Each valid PTE points to a 4 KB page frame in physical memory. Invalid PTEs are used by the OS to find pages on disk A 9-bit integer can represent all the values form 0 to 511, therefore, can select any entry in the page directory, or in a page table. This property is used when translating a ...
Chapter 16: Windows 7
... hardware supports virtual to physical mapping, a paging mechanism, transparent cache coherence on multiprocessor systems, and virtual address aliasing. The VM manager in Windows uses a page-based management ...
... hardware supports virtual to physical mapping, a paging mechanism, transparent cache coherence on multiprocessor systems, and virtual address aliasing. The VM manager in Windows uses a page-based management ...
os2-1_str
... to disrupt normal operation via illegal I/O instructions. • All I/O devices need to be protected from wrongdoing by the users (e.g., prevent current program from reading control cards of next job). • All I/O instructions need to be privileged instructions. • Given that the I/O instructions are privi ...
... to disrupt normal operation via illegal I/O instructions. • All I/O devices need to be protected from wrongdoing by the users (e.g., prevent current program from reading control cards of next job). • All I/O instructions need to be privileged instructions. • Given that the I/O instructions are privi ...
CPU Scheduling
... /* Each thread will begin control in this function */ void *runner(void *param) ...
... /* Each thread will begin control in this function */ void *runner(void *param) ...
ch13
... Improving Performance Reduce number of context switches Reduce data copying Reduce interrupts by using large transfers, smart controllers, ...
... Improving Performance Reduce number of context switches Reduce data copying Reduce interrupts by using large transfers, smart controllers, ...
I/O Speculation for the Microsecond Era
... Figure 1: Cost breakdown by strategy. These diagrams show the relative costs for the yielding, blocking and speculating strategies. patch the I/O request asynchronously (tio start ). Once the I/O request completes (tio comp ), the kernel commits the speculative execution if the request is successful ...
... Figure 1: Cost breakdown by strategy. These diagrams show the relative costs for the yielding, blocking and speculating strategies. patch the I/O request asynchronously (tio start ). Once the I/O request completes (tio comp ), the kernel commits the speculative execution if the request is successful ...
File Management
... A boot disk is a removable storage medium containing the operating system files needed to boot your computer without accessing the hard disk A recovery disk (sometimes referred to as a recovery CD) is a bootable CD, DVD, or other media that contains a complete copy of your computer’s hard disk a ...
... A boot disk is a removable storage medium containing the operating system files needed to boot your computer without accessing the hard disk A recovery disk (sometimes referred to as a recovery CD) is a bootable CD, DVD, or other media that contains a complete copy of your computer’s hard disk a ...
Introduction CS 111 On-Line MS Program Operating Systems Peter
... • But they aren’t the actual key interpreter abstraction of real operating systems • Systems like Linux and Windows use another abstraction – The process ...
... • But they aren’t the actual key interpreter abstraction of real operating systems • Systems like Linux and Windows use another abstraction – The process ...
13. I/O Systems
... CPU Interrupt-request line triggered by I/O device Interrupt handler receives interrupts Maskable to ignore or delay some interrupts Interrupt vector to dispatch interrupt to correct handler ...
... CPU Interrupt-request line triggered by I/O device Interrupt handler receives interrupts Maskable to ignore or delay some interrupts Interrupt vector to dispatch interrupt to correct handler ...
CPU-Scheduling
... – Large or small quantum – Fixed or variable quantum – Same for everyone or different – If quantum is to large RR degenerates into FCFS – If quantum is to small context switching becomes the primary job being executed • A good guide is: quantum should be slightly larger than the time required for a ...
... – Large or small quantum – Fixed or variable quantum – Same for everyone or different – If quantum is to large RR degenerates into FCFS – If quantum is to small context switching becomes the primary job being executed • A good guide is: quantum should be slightly larger than the time required for a ...
Chapter 3: Operating-System Structures Common System
... means to perform I/O. ■ File-system manipulation – program capability to read, write, create, and delete files. ■ Communications – exchange of information between processes executing either on the same computer or on different systems tied together by a network. Implemented via shared memory or mess ...
... means to perform I/O. ■ File-system manipulation – program capability to read, write, create, and delete files. ■ Communications – exchange of information between processes executing either on the same computer or on different systems tied together by a network. Implemented via shared memory or mess ...
View
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
Module 3: Operating
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
2.01 - Kangwon
... 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. Process needs to ...
... 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. Process needs to ...
ch13.pdf
... I/O Hardware (cont.) How can the processor give the commands and data to a controller to ...
... I/O Hardware (cont.) How can the processor give the commands and data to a controller to ...
ch13 Input Output Indo
... STREAM – a full-duplex communication channel between a user-level process and a device in Unix System V and beyond ...
... STREAM – a full-duplex communication channel between a user-level process and a device in Unix System V and beyond ...
... Performance analysis of N-computing device under various load conditions In most computer operating systems, the kernel is the central component. It is the bridge between the user and applications and the computer hardware. It also is the mechanism that allows the computer to handle multiple users ...
Slide 1
... 4 UNIX and Linux The UNIX operating system was developed in 1969 at AT&T’s Bell Labs – Dependable in multiuser environments Linux is an operating system distributed along with its source code under the terms of a GPL (General Public License) – A Linux distribution is a download that contains th ...
... 4 UNIX and Linux The UNIX operating system was developed in 1969 at AT&T’s Bell Labs – Dependable in multiuser environments Linux is an operating system distributed along with its source code under the terms of a GPL (General Public License) – A Linux distribution is a download that contains th ...
Operating-System Structures
... File-system manipulation - The file system is of particular interest. Programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. ...
... File-system manipulation - The file system is of particular interest. Programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. ...
NP11_IM_Chapter04
... This document is organized chronologically, using the same heading in blue that you see in the textbook. Under each heading you will find (in order): Lecture Notes that summarize the section, Figures and Boxes found in the section (if any), Teacher Tips, Classroom Activities, and Lab Activities. Pay ...
... This document is organized chronologically, using the same heading in blue that you see in the textbook. Under each heading you will find (in order): Lecture Notes that summarize the section, Figures and Boxes found in the section (if any), Teacher Tips, Classroom Activities, and Lab Activities. Pay ...
File Systems
... – an i-number is a unique (within a file system) identifier for a file or directory – given an i-number, the file system can find the data and meta-data for the file • Directories provide a way for applications to group related files • Since directories can be nested, a filesystem’s directories can ...
... – an i-number is a unique (within a file system) identifier for a file or directory – given an i-number, the file system can find the data and meta-data for the file • Directories provide a way for applications to group related files • Since directories can be nested, a filesystem’s directories can ...
HW2_wet
... when your kernel is not booting. Thus first set the priority of other processes higher than short processes and test them well and only after that do the switch the priorities to how it should be. ...
... when your kernel is not booting. Thus first set the priority of other processes higher than short processes and test them well and only after that do the switch the priorities to how it should be. ...