UNIX Operating System
... scanners faster and more flexibly than previous interfaces. Developed at Apple Computer and still used in the Macintosh, the present set of SCSIs are parallel interfaces. SCSI ports continue to be built into many personal computers today and are supported by all major operating systems. ...
... scanners faster and more flexibly than previous interfaces. Developed at Apple Computer and still used in the Macintosh, the present set of SCSIs are parallel interfaces. SCSI ports continue to be built into many personal computers today and are supported by all major operating systems. ...
The Macintosh File System (continued)
... The UNIX File System • Works differently from anything discussed up to this point • “UNIX file system” is really a misnomer – many different file systems that can be used ...
... The UNIX File System • Works differently from anything discussed up to this point • “UNIX file system” is really a misnomer – many different file systems that can be used ...
ch22
... (POSIX) standard can be complied to run on XP without changing the source code. Performance —XP subsystems can communicate with one another via high-performance message passing. Preemption of low priority threads enables the system to ...
... (POSIX) standard can be complied to run on XP without changing the source code. Performance —XP subsystems can communicate with one another via high-performance message passing. Preemption of low priority threads enables the system to ...
No Slide Title
... operating system resources. Compatibility — applications that follow the IEEE 1003.1 (POSIX) standard can be complied to run on 2000 without changing the source code. Performance — 2000 subsystems can communicate with one another via high-performance message passing. Preemption of low priority ...
... operating system resources. Compatibility — applications that follow the IEEE 1003.1 (POSIX) standard can be complied to run on 2000 without changing the source code. Performance — 2000 subsystems can communicate with one another via high-performance message passing. Preemption of low priority ...
Kernel I/O Subsystem
... Varying enough from block and character to have own interface Unix and Windows NT/9x/2000 include socket interface ...
... Varying enough from block and character to have own interface Unix and Windows NT/9x/2000 include socket interface ...
Tessellation Space-T..
... Physical memory is partitioned using conventional mechanisms such as page tables and TLBs. Hardware performance counters to monitor application performance, resource usage, and energy consumption. ...
... Physical memory is partitioned using conventional mechanisms such as page tables and TLBs. Hardware performance counters to monitor application performance, resource usage, and energy consumption. ...
UNIX Foundations - Computer Science
... does not wait for it, the proc is not released until the system is rebooted. Parent can specify that it will not wait for its children ...
... does not wait for it, the proc is not released until the system is rebooted. Parent can specify that it will not wait for its children ...
No Slide Title - ECE Users Pages
... Device reservation - provides exclusive access to a device System calls for allocation and deallocation Watch out for deadlock ...
... Device reservation - provides exclusive access to a device System calls for allocation and deallocation Watch out for deadlock ...
A+ Guide to Managing and Maintaining your PC, 6e
... First introduced in 1984 with Macintosh computers Current version: Mac OS X (ten) Mac OS X can work on some Intel-based computers Markets: education, desktop publishing, graphics Noteworthy features: ...
... First introduced in 1984 with Macintosh computers Current version: Mac OS X (ten) Mac OS X can work on some Intel-based computers Markets: education, desktop publishing, graphics Noteworthy features: ...
Concurrency Issues
... • context switch time better than process switch time by an order of magnitude, but an order of magnitude worse than user-level threads • system scheduler unaware of user thread state (e.g, in a critical region) leading to blocking and lower processor utilization Dennis Kafura - CS 5204 - Operating ...
... • context switch time better than process switch time by an order of magnitude, but an order of magnitude worse than user-level threads • system scheduler unaware of user thread state (e.g, in a critical region) leading to blocking and lower processor utilization Dennis Kafura - CS 5204 - Operating ...
threads
... Difficulty: in cases where resources have been allocated to a canceled thread or where a thread is canceled while in the midst of updating data it is sharing with other threads ...
... Difficulty: in cases where resources have been allocated to a canceled thread or where a thread is canceled while in the midst of updating data it is sharing with other threads ...
CIS 110 ch05
... • Operating system combined with the processor is known as a platform – Microsoft Windows/Intel – Apple Macintosh/Motorola ...
... • Operating system combined with the processor is known as a platform – Microsoft Windows/Intel – Apple Macintosh/Motorola ...
Desktop Linux ready for prime time and on a screen near you
... Stability . Since Linux is based on the stable UNIX operating system, it inherits that stability and reliability. Our Linux servers have uptimes in the MONTHS. Linux is open-source, which means the source code is readily available to anyone who wants it. Since the source code available, thousands of ...
... Stability . Since Linux is based on the stable UNIX operating system, it inherits that stability and reliability. Our Linux servers have uptimes in the MONTHS. Linux is open-source, which means the source code is readily available to anyone who wants it. Since the source code available, thousands of ...
PowerPoint Chapter 13
... I/O Requests to Hardware Operations Consider reading a file from disk for a process: Determine device holding file Translate name to device representation Physically read data from disk into buffer Make data available to requesting process Return control to process ...
... I/O Requests to Hardware Operations Consider reading a file from disk for a process: Determine device holding file Translate name to device representation Physically read data from disk into buffer Make data available to requesting process Return control to process ...
Chapter 13: I/O Systems I/O Hardware
... I/O Requests to Hardware Operations ■ Consider reading a file from disk for a process: ✦ Determine device holding file ✦ Translate name to device representation ✦ Physically read data from disk into buffer ✦ Make data available to requesting process ✦ Return control to process ...
... I/O Requests to Hardware Operations ■ Consider reading a file from disk for a process: ✦ Determine device holding file ✦ Translate name to device representation ✦ Physically read data from disk into buffer ✦ Make data available to requesting process ✦ Return control to process ...
Course outline - Fiji National University | E
... Explain the process concepts and be able to use the process management commands. Understand storage device organization and be able to use various schemes to improve efficiency. Secure files and data access. Be able to work effectively in any Operating Systems Environment Understand file structure a ...
... Explain the process concepts and be able to use the process management commands. Understand storage device organization and be able to use various schemes to improve efficiency. Secure files and data access. Be able to work effectively in any Operating Systems Environment Understand file structure a ...
CS465 Slides - Regis University: Academic Web Server for Faculty
... What is UNIX? (1) • UNIX is an Operating System (OS). • An operating system is a control program that allocates the computer's resources, schedules tasks, and helps the user communicate with the computer. • Most popular PC operating systems: Windows 95/98/2000/XP -- proprietary, single-user OS • UN ...
... What is UNIX? (1) • UNIX is an Operating System (OS). • An operating system is a control program that allocates the computer's resources, schedules tasks, and helps the user communicate with the computer. • Most popular PC operating systems: Windows 95/98/2000/XP -- proprietary, single-user OS • UN ...
Multicores
... the cores all communicate through the crossbar. Basically the crossbar acts as the mediator, allowing the components of the T1 to communicate to each other. We introduce the architecture of the UltraSparc T1 to contrast it with that of the AMD Opteron, IBM Cell Broadband architecture, and the Intel ...
... the cores all communicate through the crossbar. Basically the crossbar acts as the mediator, allowing the components of the T1 to communicate to each other. We introduce the architecture of the UltraSparc T1 to contrast it with that of the AMD Opteron, IBM Cell Broadband architecture, and the Intel ...
THE USER VIEW OF OPERATING SYSTEMS
... operating system both as a means of delivering services to the user and as a way of controlling and operating the system facilities. In this chapter, we take a closer look at the operating system from the perspective of service to the user. Much of the material in this chapter is at least superficia ...
... operating system both as a means of delivering services to the user and as a way of controlling and operating the system facilities. In this chapter, we take a closer look at the operating system from the perspective of service to the user. Much of the material in this chapter is at least superficia ...
Abstract View of System Components
... Why Study Operating Systems? We want to have an efficient O/S because it consumes more resources than any other program. is the most complex program. is necessary for any use of the computer. is used by many users. Efficiency is measured through Functionality Performance: Time and U ...
... Why Study Operating Systems? We want to have an efficient O/S because it consumes more resources than any other program. is the most complex program. is necessary for any use of the computer. is used by many users. Efficiency is measured through Functionality Performance: Time and U ...
EN 1975155
... Nowadays real-time applications are created as a set of cooperative and independent tasks. VxWorks enables message queue as a higher-level synchronization mechanism which allows cooperating tasks to communicate with each other this also includes high-speed semaphores. Due to the complexities in this ...
... Nowadays real-time applications are created as a set of cooperative and independent tasks. VxWorks enables message queue as a higher-level synchronization mechanism which allows cooperating tasks to communicate with each other this also includes high-speed semaphores. Due to the complexities in this ...
What is an Operating System?
... Provides a high-availability service which survives failures Asymmetric ...
... Provides a high-availability service which survives failures Asymmetric ...
Linux+ Guide to Linux Certification
... – Written in reentrant code as physically shared by several processes – Protected so that its instructions aren’t modified in any way during normal execution – Space allocated to program code can’t be released until all processes using it have completed execution – UNIX uses text table to keep track ...
... – Written in reentrant code as physically shared by several processes – Protected so that its instructions aren’t modified in any way during normal execution – Space allocated to program code can’t be released until all processes using it have completed execution – UNIX uses text table to keep track ...