Operating System Fundamentals
... family (such as Windows 98, XP and Vista). Other examples are Unix and Linux, Mac OS X, and specialized operating systems for handheld devices like mobile phones. An operating system is the software that controls (or operates) all of the parts of your computer. It manages all of your resources, and ...
... family (such as Windows 98, XP and Vista). Other examples are Unix and Linux, Mac OS X, and specialized operating systems for handheld devices like mobile phones. An operating system is the software that controls (or operates) all of the parts of your computer. It manages all of your resources, and ...
Standard Operating and Maintenance Procedures
... • Linear – data is temporarily stored and written all at one time in more contiguous spaces. – These file systems can use methods, such as writing to consecutive space and writing to existing fragmented areas, to minimize fragmentation. ...
... • Linear – data is temporarily stored and written all at one time in more contiguous spaces. – These file systems can use methods, such as writing to consecutive space and writing to existing fragmented areas, to minimize fragmentation. ...
A Taxonomy of Computer Program Security Flaws, with Examples
... This experience led researchers to seek better ways of building systems to meet security requirements in the first place instead of attempting to mend the flawed systems already installed. Although some success has been attained in identifying better strategies for building systems [12,13], these te ...
... This experience led researchers to seek better ways of building systems to meet security requirements in the first place instead of attempting to mend the flawed systems already installed. Although some success has been attained in identifying better strategies for building systems [12,13], these te ...
csl.skku.edu
... VxWorks I/O System • Provides a consistent, familiar interface to various I/O devices and file systems. - Open a file/device by name with open(). - Use the integer file descriptor returned from open() in later calls to read(), write(), and ioctl(). - File descriptors may be shared among multiple ta ...
... VxWorks I/O System • Provides a consistent, familiar interface to various I/O devices and file systems. - Open a file/device by name with open(). - Use the integer file descriptor returned from open() in later calls to read(), write(), and ioctl(). - File descriptors may be shared among multiple ta ...
Chapter 1
... mount(“/dev/fd0”, “/mnt”, 0) is system call File comes from drive 0 and is mounted on binary file /mnt. Third parameter tells if it is read or read-write Result is that file on drive zero can be accessed from a directory Saw this example before with CD-same mechanism for memory sticks and portions o ...
... mount(“/dev/fd0”, “/mnt”, 0) is system call File comes from drive 0 and is mounted on binary file /mnt. Third parameter tells if it is read or read-write Result is that file on drive zero can be accessed from a directory Saw this example before with CD-same mechanism for memory sticks and portions o ...
Proceedings of the FREENIX Track: 2003 USENIX Annual Technical Conference
... transparent IP address remapping between user and kernel space. While the kernel still maintains a single routing table with unique (non-overlapping) entries, for each virtual node a translation map is maintained which has to be consulted on each userland-to-kernel network transaction. Despite such ...
... transparent IP address remapping between user and kernel space. While the kernel still maintains a single routing table with unique (non-overlapping) entries, for each virtual node a translation map is maintained which has to be consulted on each userland-to-kernel network transaction. Despite such ...
Lessons Learned from 30 Years of MINIX,
... PC with only a single 360kB floppy disk; ˲˲ Build and maintain the system using itself, or “self-hosting”; ˲˲ Make the full source code available to everyone; ˲˲ Have a clean design students could easily understand; ˲˲ Make the (micro) kernel as small as possible, since kernel failures are fatal; ˲˲ ...
... PC with only a single 360kB floppy disk; ˲˲ Build and maintain the system using itself, or “self-hosting”; ˲˲ Make the full source code available to everyone; ˲˲ Have a clean design students could easily understand; ˲˲ Make the (micro) kernel as small as possible, since kernel failures are fatal; ˲˲ ...
operating system concepts
... 1.7 We have stressed the need for an operating system to make efficient use of the computing hardware. When is it appropriate for the operating system to forsake this principle and to “waste” resources? Why is such a system not really wasteful? Answer: Single-user systems should maximize use of the ...
... 1.7 We have stressed the need for an operating system to make efficient use of the computing hardware. When is it appropriate for the operating system to forsake this principle and to “waste” resources? Why is such a system not really wasteful? Answer: Single-user systems should maximize use of the ...
5_disk_scheduling
... • Most OSs handle removable disks almost exactly like fixed disks — a new cartridge is formatted and an empty file system is generated on the disk • Tapes are presented as a raw storage medium, i.e., and application does not not open a file on the tape, it opens the whole tape drive as a raw device ...
... • Most OSs handle removable disks almost exactly like fixed disks — a new cartridge is formatted and an empty file system is generated on the disk • Tapes are presented as a raw storage medium, i.e., and application does not not open a file on the tape, it opens the whole tape drive as a raw device ...
Module 6: CPU Scheduling
... jumping to the proper location in the user program to restart that program ...
... jumping to the proper location in the user program to restart that program ...
The Operating System is the Control Plane - Arrakis
... should “get out of the way” and give applications direct access to hardware devices. Nevertheless, most web services are still built as applications on top of a traditional kernel, because exchanging reliability for better performance is rarely a good tradeoff. Our goal is to provide the best of bot ...
... should “get out of the way” and give applications direct access to hardware devices. Nevertheless, most web services are still built as applications on top of a traditional kernel, because exchanging reliability for better performance is rarely a good tradeoff. Our goal is to provide the best of bot ...
Lecture 8: Operating Systems Structures
... – Computers do this every decade (at least until 2002)! ...
... – Computers do this every decade (at least until 2002)! ...
Chapter 3: Processes
... Process Representation in Linux Represented by the C structure task_struct ...
... Process Representation in Linux Represented by the C structure task_struct ...
Threads
... • What happens when a signal is received? – Catch: Specify signal handler to be called – Ignore: Rely on OS default action • Example: Abort, memory dump, suspend or resume process – Mask: Block signal so it is not delivered • May be temporary (while handling signal of same type) ...
... • What happens when a signal is received? – Catch: Specify signal handler to be called – Ignore: Rely on OS default action • Example: Abort, memory dump, suspend or resume process – Mask: Block signal so it is not delivered • May be temporary (while handling signal of same type) ...
files
... configure, disable, or enable OS features, such as number of files that can be opened. Used in new operating systems to support legacy software applications. ...
... configure, disable, or enable OS features, such as number of files that can be opened. Used in new operating systems to support legacy software applications. ...
Chapter 4 Notes
... thread libraries To explore several strategies that provide implicit threading To examine issues related to multithreaded programming To cover operating system support for threads in Windows and ...
... thread libraries To explore several strategies that provide implicit threading To examine issues related to multithreaded programming To cover operating system support for threads in Windows and ...
ppt - Computer and Information Science
... Tanenbaum & Bo, Modern Operating Systems:4th ed., (c) 2013 Prentice-Hall, Inc. All rights reserved. ...
... Tanenbaum & Bo, Modern Operating Systems:4th ed., (c) 2013 Prentice-Hall, Inc. All rights reserved. ...
1- intro to rts
... admit a process from "new" into "ready". It uses the loader to do this. • The CPU scheduler or short-term scheduler decides to dispatch a process from "ready" into "running". This requires a context switch (more on that later.) • The CPU scheduler also decides to remove a process from "running" to " ...
... admit a process from "new" into "ready". It uses the loader to do this. • The CPU scheduler or short-term scheduler decides to dispatch a process from "ready" into "running". This requires a context switch (more on that later.) • The CPU scheduler also decides to remove a process from "running" to " ...
Slide 1
... Automated System Recovery (ASR) Dynamic disk support Fax service Internet Information Services (IIS)/Personal Web server Encrypting File System (EFS) continued ...
... Automated System Recovery (ASR) Dynamic disk support Fax service Internet Information Services (IIS)/Personal Web server Encrypting File System (EFS) continued ...
chubby and paxos
... P2- If a proposal with value v is chosen, then every higher numbered proposal that is chosen has value v P2a- If a proposal with value v is chosen, then every higher accepted by any proposer has value v P2b- If a proposal with value v is chosen, then every higher accepted by any proposer has value v ...
... P2- If a proposal with value v is chosen, then every higher numbered proposal that is chosen has value v P2a- If a proposal with value v is chosen, then every higher accepted by any proposer has value v P2b- If a proposal with value v is chosen, then every higher accepted by any proposer has value v ...