2-OS
... • Discussion points – 64-bit processing is faster than 32-bit processing – 64-bit OS requires that device drivers operating in kernel mode be 64-bit drivers – Application is compiled to process 64 bits or 32 bits – 32-bit OS can only address up to 4 GB of memory – Benefit from 64-bit computing if: • ...
... • Discussion points – 64-bit processing is faster than 32-bit processing – 64-bit OS requires that device drivers operating in kernel mode be 64-bit drivers – Application is compiled to process 64 bits or 32 bits – 32-bit OS can only address up to 4 GB of memory – Benefit from 64-bit computing if: • ...
... Random Mix: This test measures the performance of reading and writing a file with accesses being made to random locations within the file. Again the performance of a system under this type of activity can be impacted by several factors such as: Size of operating system’s cache, number of disks, seek ...
Operating Systems - s3.amazonaws.com
... The OS may be split into a kernel which is always present and various system programs which use facilities provided by the kernel to perform higher-level house-keeping tasks, often acting as servers in a client-server relationship. ...
... The OS may be split into a kernel which is always present and various system programs which use facilities provided by the kernel to perform higher-level house-keeping tasks, often acting as servers in a client-server relationship. ...
Operating Systems and File Management
... 042200 Today’s popular operating systems include Windows, Mac OS, Linux, Android, and iOS. Each has strengths and weaknesses that are important to understand. Which of the following statements is correct? A. iOS is built on the Windows kernel, so it is ideal for smartphones because it has good r ...
... 042200 Today’s popular operating systems include Windows, Mac OS, Linux, Android, and iOS. Each has strengths and weaknesses that are important to understand. Which of the following statements is correct? A. iOS is built on the Windows kernel, so it is ideal for smartphones because it has good r ...
Chapter 10 File System Interface
... Required File Operations 5) Delete – from the OpSys perspective, remove file and all of its contents from device on which it is stored. Also removes directory entry on device. On some OpSys, e.g. UNIX., processes do not delete files; they remove the names of the files from the parent directory ...
... Required File Operations 5) Delete – from the OpSys perspective, remove file and all of its contents from device on which it is stored. Also removes directory entry on device. On some OpSys, e.g. UNIX., processes do not delete files; they remove the names of the files from the parent directory ...
Files and File Systems • files: persistent, named data objects – data
... • A directory maps file names (strings) to i-numbers – an i-number is a unique (within a file system) identifier for a file or directory – given an i-number, the file system can file the data and meta-data the file • Directories provide a way for applications to group related files • Since directori ...
... • A directory maps file names (strings) to i-numbers – an i-number is a unique (within a file system) identifier for a file or directory – given an i-number, the file system can file the data and meta-data the file • Directories provide a way for applications to group related files • Since directori ...
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 */ ...
Charles Petzold, “Windows Programming”
... Second parameter • A program could determine if other instances of itself were running by checking the hPrevInstance parameter. • It could then skip certain chores and move some data from the previous instance into its own data area. • In the 32-bit versions of Windows, this concept has been aband ...
... Second parameter • A program could determine if other instances of itself were running by checking the hPrevInstance parameter. • It could then skip certain chores and move some data from the previous instance into its own data area. • In the 32-bit versions of Windows, this concept has been aband ...
Slide 1
... and allocating memory according to program needs. Multitasking – two or more programs running simultaneously Multithreading allows multiple parts, or threads, of a single program to run simultaneously Multiprocessing capability supports a division of labor among all the processing units A me ...
... and allocating memory according to program needs. Multitasking – two or more programs running simultaneously Multithreading allows multiple parts, or threads, of a single program to run simultaneously Multiprocessing capability supports a division of labor among all the processing units A me ...
Slide 1
... 042200 Today’s popular operating systems include Windows, Mac OS, Linux, Android, and Google Chrome. Each has strengths and weaknesses that are important to understand. Which of the following statements is correct? – A. Google Chrome is built on the Windows kernel, so it is ideal for netbooks beca ...
... 042200 Today’s popular operating systems include Windows, Mac OS, Linux, Android, and Google Chrome. Each has strengths and weaknesses that are important to understand. Which of the following statements is correct? – A. Google Chrome is built on the Windows kernel, so it is ideal for netbooks beca ...
Operating Systems
... Blocking - process suspended until I/O completed – Easy to use and understand – Insufficient for some needs Nonblocking - I/O call returns as much as available – E.g., User interface that received keyboard input while processing and displaying data on the screen – One approach: Implemented via multi ...
... Blocking - process suspended until I/O completed – Easy to use and understand – Insufficient for some needs Nonblocking - I/O call returns as much as available – E.g., User interface that received keyboard input while processing and displaying data on the screen – One approach: Implemented via multi ...
Distributed File Systems
... NFS and ONC figured prominently in the network-computing war between Sun Microsystems and Apollo Computer, and later the UNIX wars (ca 1987-1996) between AT&T and Sun on one side, and Digital Equipment, HP, and IBM on the other. During the development of the ONC protocol (called SunRPC at the time), ...
... NFS and ONC figured prominently in the network-computing war between Sun Microsystems and Apollo Computer, and later the UNIX wars (ca 1987-1996) between AT&T and Sun on one side, and Digital Equipment, HP, and IBM on the other. During the development of the ONC protocol (called SunRPC at the time), ...
Assignment0: Linux Basics and /proc
... makes /proc the current directory. Once you have made /proc the current directory, you can list its contents by using the ls command. The contents appear to be ordinary files and directories. However, a file in /proc or one of its subdirectories is actually a program that reads kernel variables and ...
... makes /proc the current directory. Once you have made /proc the current directory, you can list its contents by using the ls command. The contents appear to be ordinary files and directories. However, a file in /proc or one of its subdirectories is actually a program that reads kernel variables and ...
Ceng 334 - Operating Systems
... Creating a socket returns a file descriptor, which is needed for establishing a connection, reading data, writing data, and releasing the connection One party makes a listen call on a local socket, which creates a buffer and blocks until data arrive The other party makes a connect call giving as par ...
... Creating a socket returns a file descriptor, which is needed for establishing a connection, reading data, writing data, and releasing the connection One party makes a listen call on a local socket, which creates a buffer and blocks until data arrive The other party makes a connect call giving as par ...
File Management
... To designate a file’s location, you must first specify the device where the file is stored The main hard disk usually is referred to as drive C ...
... To designate a file’s location, you must first specify the device where the file is stored The main hard disk usually is referred to as drive C ...
OS Structures and Java
... The operating system is responsible for Process creation and deletion (= starting and terminating a program execution) process suspension and resumption (= letting a program wait for an I/O operation or a next turn) process synchronization (= letting a program wait for another program’s termin ...
... The operating system is responsible for Process creation and deletion (= starting and terminating a program execution) process suspension and resumption (= letting a program wait for an I/O operation or a next turn) process synchronization (= letting a program wait for another program’s termin ...
Transparency in Distributed Systems
... transparencies, is not always possible and all these transparencies may not be required by all the distributed systems. The need for any particular transparency mainly depends on the application of the distributed system. For example the replication transparency is more pronounced in case of Distrib ...
... transparencies, is not always possible and all these transparencies may not be required by all the distributed systems. The need for any particular transparency mainly depends on the application of the distributed system. For example the replication transparency is more pronounced in case of Distrib ...
9781439079201_PPT_ch14
... • Puts on stack: contents of PSW (program status word), code segment register, and instruction pointer register • Disables interrupt system • Uses eight-bit number to obtain interrupt handler ...
... • Puts on stack: contents of PSW (program status word), code segment register, and instruction pointer register • Disables interrupt system • Uses eight-bit number to obtain interrupt handler ...
Slide 1
... Today’s popular operating systems include Windows, Mac OS, Linux, Android, and Google Chrome. Each has strengths and weaknesses that are important to understand. Which of the following statements is correct? ...
... Today’s popular operating systems include Windows, Mac OS, Linux, Android, and Google Chrome. Each has strengths and weaknesses that are important to understand. Which of the following statements is correct? ...
Chapter One
... make up an OS originated with UNIX Linux is a UNIX-like OS and can coexist with Windows and MS-DOS In UNIX, you communicate with the OS programs through an interpreter called the shell and UNIX provides shells such as the Bourne, Korn, and C shells, with Bash being the most popular on Linux systems ...
... make up an OS originated with UNIX Linux is a UNIX-like OS and can coexist with Windows and MS-DOS In UNIX, you communicate with the OS programs through an interpreter called the shell and UNIX provides shells such as the Bourne, Korn, and C shells, with Bash being the most popular on Linux systems ...
Ch. 14 : UNIX Operating System with Linux
... Dynamic libraries are loaded only when they’re needed & their code is shared if several applications are using them. Linux allows file partitions used by file systems such as Ext2 and partitions having other formats (MS-DOS, ISO 9660, etc.) It supports TCP/IP and other network protocols. ...
... Dynamic libraries are loaded only when they’re needed & their code is shared if several applications are using them. Linux allows file partitions used by file systems such as Ext2 and partitions having other formats (MS-DOS, ISO 9660, etc.) It supports TCP/IP and other network protocols. ...
Slide 1
... To designate a file’s location, you must first specify the device where the file is stored – The main hard disk usually is referred to as Drive C A disk partition is a section of hard disk drive that is treated as a separate storage unit – Partitions can be assigned drive letters – Partitions ar ...
... To designate a file’s location, you must first specify the device where the file is stored – The main hard disk usually is referred to as Drive C A disk partition is a section of hard disk drive that is treated as a separate storage unit – Partitions can be assigned drive letters – Partitions ar ...
UNIX Software Tools
... an email system) the software on the local host is the client and the software on the remote host is the server. In a X-Windows system this is reversed. The X-Windows server is on your local machine. It provides the following services: keyboard input, mouse, procedures for drawing on the screen, ...
... an email system) the software on the local host is the client and the software on the remote host is the server. In a X-Windows system this is reversed. The X-Windows server is on your local machine. It provides the following services: keyboard input, mouse, procedures for drawing on the screen, ...