Lecture 3
... Safety Issues • If the machine is doing multiprocessing, failures in one process shouldn’t hurt another • If process A divides by zero, that’s not process B’s problem • If process C and process D both ask to get data off the disk, they should only see their own data • Only the OS knows enough and i ...
... Safety Issues • If the machine is doing multiprocessing, failures in one process shouldn’t hurt another • If process A divides by zero, that’s not process B’s problem • If process C and process D both ask to get data off the disk, they should only see their own data • Only the OS knows enough and i ...
Chapter 3: Operating Systems
... Transfers operating system from mass storage to main memory Executes jump to operating system The term Bootstrapping is often attributed to Rudolf Erich Raspe's story The Surprising Adventures of Baron Münchausen, where the main character pulls himself out of a swamp, though it's disputed wh ...
... Transfers operating system from mass storage to main memory Executes jump to operating system The term Bootstrapping is often attributed to Rudolf Erich Raspe's story The Surprising Adventures of Baron Münchausen, where the main character pulls himself out of a swamp, though it's disputed wh ...
slides-13
... STREAM – a full-duplex communication channel between a user-level process and a device in Unix System V and beyond to assemble pipelines dynamically ...
... STREAM – a full-duplex communication channel between a user-level process and a device in Unix System V and beyond to assemble pipelines dynamically ...
Process Management - Computer Science
... user thread executing system call to perform I/O user thread state is saved for later resume OS code to perform system call is invoked I/O operation started (by invoking I/O driver) set thread status to waiting move thread’s TCB from run queue to wait queue associated with specific devic ...
... user thread executing system call to perform I/O user thread state is saved for later resume OS code to perform system call is invoked I/O operation started (by invoking I/O driver) set thread status to waiting move thread’s TCB from run queue to wait queue associated with specific devic ...
Operating System Security (II)
... • persistent accounting information: user & group ownership, time stamps, etc. • information to locate the disk blocks holding the file’s data in-core i-node (file system independent) • transient management information: access flags (locked, modified), processes holding it, read/write pointer, etc ...
... • persistent accounting information: user & group ownership, time stamps, etc. • information to locate the disk blocks holding the file’s data in-core i-node (file system independent) • transient management information: access flags (locked, modified), processes holding it, read/write pointer, etc ...
DOS Tutorial
... Every disk drive has a root directory which can have subdirectories which are named in the same format as filenames, (though generally without any extension). The subdirectories can have subdirectories and so on. Eg: a floppy disk might contain the following directory structure: PICTURES [a director ...
... Every disk drive has a root directory which can have subdirectories which are named in the same format as filenames, (though generally without any extension). The subdirectories can have subdirectories and so on. Eg: a floppy disk might contain the following directory structure: PICTURES [a director ...
File System - dhdurso.org index to available resources
... – unique process identifier – scheduling information (e.g., priority) – pointers to other control blocks The virtual address space of a user process is divided into text (program code), data, and stack segments. Every process with sharable text has a pointer form its process structure to a text stru ...
... – unique process identifier – scheduling information (e.g., priority) – pointers to other control blocks The virtual address space of a user process is divided into text (program code), data, and stack segments. Every process with sharable text has a pointer form its process structure to a text stru ...
ch04_THREADS
... maintain the appropriate number of kernel threads allocated to the application Scheduler activations provide upcalls - a communication ...
... maintain the appropriate number of kernel threads allocated to the application Scheduler activations provide upcalls - a communication ...
Import Settings: Base Settings: Brownstone Default Highest Answer
... A) An operating system provides an environment for the execution of programs. B) An operating system manages system resources. C) Operating systems provide both command line as well as graphical user interfaces. D) Operating systems must provide both protection and security. Ans: C Feedback: 2.1 Dif ...
... A) An operating system provides an environment for the execution of programs. B) An operating system manages system resources. C) Operating systems provide both command line as well as graphical user interfaces. D) Operating systems must provide both protection and security. Ans: C Feedback: 2.1 Dif ...
Benu: Operating System Increments for Embedded
... use by enthusiasts than in coursework. Nachos [12] is a system skeleton prepared for student assignments (in C++) that complete some of the Nachos functionalities. Topics covered by Nachos include thread and process management, paging, file systems and network subsystems. Because solutions from prev ...
... use by enthusiasts than in coursework. Nachos [12] is a system skeleton prepared for student assignments (in C++) that complete some of the Nachos functionalities. Topics covered by Nachos include thread and process management, paging, file systems and network subsystems. Because solutions from prev ...
File
... A) An operating system provides an environment for the execution of programs. B) An operating system manages system resources. C) Operating systems provide both command line as well as graphical user interfaces. D) Operating systems must provide both protection and security. Ans: C Feedback: 2.1 Dif ...
... A) An operating system provides an environment for the execution of programs. B) An operating system manages system resources. C) Operating systems provide both command line as well as graphical user interfaces. D) Operating systems must provide both protection and security. Ans: C Feedback: 2.1 Dif ...
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. ...
3. Processes
... The objective of multiprogramming is to have some process running at all times, so as to maximize CPU utilization. The objective of time-sharing is to switch the CPU among processes so frequently that users can interact with each program while it is running. A uniprocessor system can have only one r ...
... The objective of multiprogramming is to have some process running at all times, so as to maximize CPU utilization. The objective of time-sharing is to switch the CPU among processes so frequently that users can interact with each program while it is running. A uniprocessor system can have only one r ...
Set 13
... Varying enough from block and character to have own interface Unix and Windows NT/9x/2000 include socket interface z ...
... Varying enough from block and character to have own interface Unix and Windows NT/9x/2000 include socket interface z ...
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. ...
Module 4: Processes
... /proc/sys/kernel/sched_granularity_ns, which can be used to tune the scheduler from 'desktop' (low latencies) to 'server' (good ...
... /proc/sys/kernel/sched_granularity_ns, which can be used to tune the scheduler from 'desktop' (low latencies) to 'server' (good ...
EuroDesign embedded technologies GmbH
... system manually. The BIOS has a setup function in which many parameters will be initialized or in some cases changes will be make possible to this first. The configuration of the hardware is always the same in an embedded PC yet: Neither the CPU changes, nor the memory type or size. The connected ot ...
... system manually. The BIOS has a setup function in which many parameters will be initialized or in some cases changes will be make possible to this first. The configuration of the hardware is always the same in an embedded PC yet: Neither the CPU changes, nor the memory type or size. The connected ot ...
CSC420 สัปดาห์ที่ 2
... requests associated with each of the active processes. • Dijkstra’s Bankers Algorithm (1965) used to regulate resources allocation to avoid deadlock. • Safe state -- if there exists a safe sequence of all processes where they can all get the resources needed. • Unsafe state -- doesn’t necessarily le ...
... requests associated with each of the active processes. • Dijkstra’s Bankers Algorithm (1965) used to regulate resources allocation to avoid deadlock. • Safe state -- if there exists a safe sequence of all processes where they can all get the resources needed. • Unsafe state -- doesn’t necessarily le ...
Socket Programming
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
Programming with TCP/IP
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
Socket
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...