2.01 - Suan Dusit Rajabhat University
... This property is used when translating a virtual address pointer to a bye address in physical memory. A page can be in one of six states: valid, zeroed, free standby, modified and bad. ...
... This property is used when translating a virtual address pointer to a bye address in physical memory. A page can be in one of six states: valid, zeroed, free standby, modified and bad. ...
Operating-System Structures
... Although MS-DOS has some structure, its interfaces and levels of functionality are not well separated ...
... Although MS-DOS has some structure, its interfaces and levels of functionality are not well separated ...
[slides] Case study: Windows
... 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 ...
Lecture 1: Course Introduction and Overview
... – An instance of an executing program is a process consisting of an address space and one or more threads of control ...
... – An instance of an executing program is a process consisting of an address space and one or more threads of control ...
Windows 95/98/NT (Introduction)
... ing for Win32-based applications (but also supports cooperative multitasking for computability reasons). Thus, the operating system takes direct control away from the application tasks. Win16 programs need to yield to other tasks in order to multitask properly, whereas Win32-based programs do not ne ...
... ing for Win32-based applications (but also supports cooperative multitasking for computability reasons). Thus, the operating system takes direct control away from the application tasks. Win16 programs need to yield to other tasks in order to multitask properly, whereas Win32-based programs do not ne ...
ch16.ppt
... 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 ...
Chapter 16: Windows 7
... metadata files) are undamaged and reflect some consistent state prior to the crash. The log is stored in the third metadata file at the beginning of the ...
... metadata files) are undamaged and reflect some consistent state prior to the crash. The log is stored in the third metadata file at the beginning of the ...
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 ...
1.01
... File Operations File is an abstract data type Operations include the following (and usually more) Create – find space, add entry to directory Write – write data at current file position pointer location ...
... File Operations File is an abstract data type Operations include the following (and usually more) Create – find space, add entry to directory Write – write data at current file position pointer location ...
word
... protection domains (kernel processes, User’s processes), and other constraints (process preemption), etc… are not needed since the users are totally dependable and co-operative. However, many operating system services such as file systems, virtual memory, IO system etc still needs to exist although ...
... protection domains (kernel processes, User’s processes), and other constraints (process preemption), etc… are not needed since the users are totally dependable and co-operative. However, many operating system services such as file systems, virtual memory, IO system etc still needs to exist although ...
第六章文件系统
... i-node, B will have a dir entry pointing to an invalid i-node. If the i-node is later reassigned to another file, B’s link will point to the wrong file. The system can see from the count in the i-node that the file is still in use, but there is no way for it to find all the dir entries for the fil ...
... i-node, B will have a dir entry pointing to an invalid i-node. If the i-node is later reassigned to another file, B’s link will point to the wrong file. The system can see from the count in the i-node that the file is still in use, but there is no way for it to find all the dir entries for the fil ...
CS311 - NUS School of Computing
... might take 8 minutes to run, and 8 minutes to print, giving 33% CPU usage. The programs might call a ’card reader’ routine which actually read from the tape drive the card images as needed. Spooling was also used to buffer printing in the same way. ’Card images’ are still an important part of many m ...
... might take 8 minutes to run, and 8 minutes to print, giving 33% CPU usage. The programs might call a ’card reader’ routine which actually read from the tape drive the card images as needed. Spooling was also used to buffer printing in the same way. ’Card images’ are still an important part of many m ...
The History of Amoeba
... traveling sales men problem, factoring, and make files. All of these problems can potentially take a long time. Factoring traditionally has a horrible time to figure out for any given problem. This is why factoring is used in current encryption techniques, because it is takes so long to brute force. ...
... traveling sales men problem, factoring, and make files. All of these problems can potentially take a long time. Factoring traditionally has a horrible time to figure out for any given problem. This is why factoring is used in current encryption techniques, because it is takes so long to brute force. ...
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 ...
ppt
... RandomAccessFile raf = new RandomAccessFile("file.txt", "rw"); // get the channel for the file ...
... RandomAccessFile raf = new RandomAccessFile("file.txt", "rw"); // get the channel for the file ...
Chapter 9: File-System Interface
... RandomAccessFile raf = new RandomAccessFile("file.txt", "rw"); // get the channel for the file ...
... RandomAccessFile raf = new RandomAccessFile("file.txt", "rw"); // get the channel for the file ...
Using Interaction Networks for Visualisation of Message Passing
... network displays to illustrate aspects of the internal operation of MINIX. Students were given the monitoring software, and selected appropriate networks themselves. They had no difficulty in coming up with many interesting examples, including ones similar to those presented in this paper. In 1996, ...
... network displays to illustrate aspects of the internal operation of MINIX. Students were given the monitoring software, and selected appropriate networks themselves. They had no difficulty in coming up with many interesting examples, including ones similar to those presented in this paper. In 1996, ...
developing a saas-cloud integrated development environment (ide)
... developer in building software applications with an integrated environment combined with all the required tools at hand. Most common features, such as debugging, version control and data structure browsing, help a developer quickly execute actions without switching to other applications. Thus, it he ...
... developer in building software applications with an integrated environment combined with all the required tools at hand. Most common features, such as debugging, version control and data structure browsing, help a developer quickly execute actions without switching to other applications. Thus, it he ...
Lecture 10
... • Essentially, making a copy of the capability and giving it to someone else • If capabilities are inside the OS, it must approve • If capabilities are in user/process hands, they just copy the bits and hand out the copy – Crypto methods can customize a capability for one user, ...
... • Essentially, making a copy of the capability and giving it to someone else • If capabilities are inside the OS, it must approve • If capabilities are in user/process hands, they just copy the bits and hand out the copy – Crypto methods can customize a capability for one user, ...
Operating Systems File System File System File System Functions
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
PPT Chapter 13
... • MS-DOS uses a variant of linked allocation that stores the metadata separately from the file data • FAT has one element corresponding to every disk block in the disk – Penalty: FAT has to be accessed to obtain the address of the next disk block • Solution: FAT is held in memory during file process ...
... • MS-DOS uses a variant of linked allocation that stores the metadata separately from the file data • FAT has one element corresponding to every disk block in the disk – Penalty: FAT has to be accessed to obtain the address of the next disk block • Solution: FAT is held in memory during file process ...
Operating Systems II
... Hardware Support for Operating Systems Recall that OS should securely multiplex resources. ⇒ we need to ensure that an application cannot: • compromise the operating system. • compromise other applications. • deny others service (e.g. abuse resources) To achieve this efficiently and flexibly, we ne ...
... Hardware Support for Operating Systems Recall that OS should securely multiplex resources. ⇒ we need to ensure that an application cannot: • compromise the operating system. • compromise other applications. • deny others service (e.g. abuse resources) To achieve this efficiently and flexibly, we ne ...
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.