ppt
... Many systems now servers, responding to requests generated by clients Compute-server provides an interface to client to request ...
... Many systems now servers, responding to requests generated by clients Compute-server provides an interface to client to request ...
ch1
... Many systems now servers, responding to requests generated by clients Compute-server provides an interface to client to request ...
... Many systems now servers, responding to requests generated by clients Compute-server provides an interface to client to request ...
operating system design
... Since multiple users can be logged into a computer at the same time, the operating system needs to provide mechanisms to keep them separated. One user may not interfere with another. The process concept is widely used to group resources together for protection purposes. Files and other data structur ...
... Since multiple users can be logged into a computer at the same time, the operating system needs to provide mechanisms to keep them separated. One user may not interfere with another. The process concept is widely used to group resources together for protection purposes. Files and other data structur ...
File System Management
... Fine-grained arrays interleave data in relatively small units so that all I/O requests, regardless of their size, access all of the disks in the disk array. This results in very high data transfer rate for all I/O requests but has the disadvantages that only one logical I/O request can be serviced a ...
... Fine-grained arrays interleave data in relatively small units so that all I/O requests, regardless of their size, access all of the disks in the disk array. This results in very high data transfer rate for all I/O requests but has the disadvantages that only one logical I/O request can be serviced a ...
Lecture 2 - Rabie A. Ramadan
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application Program Interface ...
... Programming interface to the services provided by the OS Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level Application Program Interface ...
OPERATING SYSTEM CONCEPTS
... List five services provided by an operating system. Explain how each provides convenience to the users. Explain also in which cases it would be impossible for user-level programs to provide these services. Answer: a. Program execution. The operating system loads the contents (or sections) of a file ...
... List five services provided by an operating system. Explain how each provides convenience to the users. Explain also in which cases it would be impossible for user-level programs to provide these services. Answer: a. Program execution. The operating system loads the contents (or sections) of a file ...
슬라이드 1
... Linux is, in simplest terms, an operating system. It is the software on a computer that enables applications and the computer operator to access the devices on the computer to perform desired functions. The operating system relays instructions from an application to, for instance, the computer's pro ...
... Linux is, in simplest terms, an operating system. It is the software on a computer that enables applications and the computer operator to access the devices on the computer to perform desired functions. The operating system relays instructions from an application to, for instance, the computer's pro ...
- TestbankU
... 21. There are two different ways that commands can be processed by a command interpreter. One way is to allow the command interpreter to contain the code needed to execute the command. The other way is to implement the commands through system programs. Compare and contrast the two approaches. Ans: I ...
... 21. There are two different ways that commands can be processed by a command interpreter. One way is to allow the command interpreter to contain the code needed to execute the command. The other way is to implement the commands through system programs. Compare and contrast the two approaches. Ans: I ...
PPT Chapter 13
... – A directory entry contains only the file name – Inode of a file contains file size, owner id, access permissions and disk block allocation information – A file structure contains information about an open file • It contains current position in file, and pointer to its inode ...
... – A directory entry contains only the file name – Inode of a file contains file size, owner id, access permissions and disk block allocation information – A file structure contains information about an open file • It contains current position in file, and pointer to its inode ...
AIM COLLEGE-HISAR What is an Operating System?
... One way that operating-system designers reduce the chance of thrashing is by reducing the need for new processes to perform various tasks. Some operating systems allow for a "process-lite," called a thread, that can deal with all the CPU-intensive work of a normal process, but generally does not dea ...
... One way that operating-system designers reduce the chance of thrashing is by reducing the need for new processes to perform various tasks. Some operating systems allow for a "process-lite," called a thread, that can deal with all the CPU-intensive work of a normal process, but generally does not dea ...
File System
... Typically the first block of a volume which contains the info needed to boot an OS from that volume (can be empty if volume does not contain an OS) ...
... Typically the first block of a volume which contains the info needed to boot an OS from that volume (can be empty if volume does not contain an OS) ...
Distributed Computing Systems
... distributed computing systems. Programming Project: Every student or a group of two maximum is required to develop a project that applies distributed computing to solve a computationally intensive application a cross a cluster of workstations. The project could be developed using any message-passi ...
... distributed computing systems. Programming Project: Every student or a group of two maximum is required to develop a project that applies distributed computing to solve a computationally intensive application a cross a cluster of workstations. The project could be developed using any message-passi ...
Message- passing and RPC Processes Processes vs. Threads
... Requires non-blocking system calls (i.e., a possibly multithreaded kernel) n Otherwise, entire process will blocked in the kernel, even if there are runnable threads left in the process ...
... Requires non-blocking system calls (i.e., a possibly multithreaded kernel) n Otherwise, entire process will blocked in the kernel, even if there are runnable threads left in the process ...
REF Chapter 3: Windows NT System Specifics
... The BASIS on Windows interface is very similar to that of other Windows programs. Once installed, BASIS on Windows has a program group icon in the Program Manager. You can access the most commonly used BASIS modules by double clicking this icon. Modules included as program items in the Basis program ...
... The BASIS on Windows interface is very similar to that of other Windows programs. Once installed, BASIS on Windows has a program group icon in the Program Manager. You can access the most commonly used BASIS modules by double clicking this icon. Modules included as program items in the Basis program ...
No Slide Title - ECE Users Pages
... Character devices include keyboards, mice, serial ports Commands include get, put Libraries layered on top allow line editing ...
... Character devices include keyboards, mice, serial ports Commands include get, put Libraries layered on top allow line editing ...
Powerpoint format
... IPC Using Named Pipes Named pipes are created as special files. They are also called FIFO (First-in First-out) Named pipes can be created from the shell with (for example)“mknod myfifo p” This command results in the creation of a named pipe called myfifo with a file type p (try it out) Operating Sy ...
... IPC Using Named Pipes Named pipes are created as special files. They are also called FIFO (First-in First-out) Named pipes can be created from the shell with (for example)“mknod myfifo p” This command results in the creation of a named pipe called myfifo with a file type p (try it out) Operating Sy ...
File System - UC Davis Computer Science
... File code: specifies if the i-node represents a directory, an ordinary user file, or a “special file” (typically an I/O device) • Size: length of file in bytes • Block list: locates contents of file (in the file contents ...
... File code: specifies if the i-node represents a directory, an ordinary user file, or a “special file” (typically an I/O device) • Size: length of file in bytes • Block list: locates contents of file (in the file contents ...
Chapter 2 – Operating System Overview
... 5. The earliest computers employed ________________ processing, a name derived by the way the users were forced to access the systems. ANS: serial 6. The special type of programming language used to provide instructions to a monitor in a batch-processing scheme is called ________________. ANS: Job C ...
... 5. The earliest computers employed ________________ processing, a name derived by the way the users were forced to access the systems. ANS: serial 6. The special type of programming language used to provide instructions to a monitor in a batch-processing scheme is called ________________. ANS: Job C ...
ch1 - CE Sharif
... Typically system has many processes, some user, some operating system running concurrently on one or more CPUs Concurrency by multiplexing the CPUs among the processes / threads ...
... Typically system has many processes, some user, some operating system running concurrently on one or more CPUs Concurrency by multiplexing the CPUs among the processes / threads ...
File - BS
... Mode bit provided by hardware Provides ability to distinguish when system is running user code or kernel code ...
... Mode bit provided by hardware Provides ability to distinguish when system is running user code or kernel code ...
Operating Systems ECE344 - EECG Toronto
... How NotTo pass ECE344 (2) • Do not ask questions in lecture, office hours, or piazza • It’s scary, I don’t want to embarrass myself • TRUTH: asking questions is the best way to clarify lecture material at the time it is being presented • “There is no such things as stupid question…” ...
... How NotTo pass ECE344 (2) • Do not ask questions in lecture, office hours, or piazza • It’s scary, I don’t want to embarrass myself • TRUTH: asking questions is the best way to clarify lecture material at the time it is being presented • “There is no such things as stupid question…” ...
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 ...
Chap. 2, Operating System Structures
... writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.” ...
... writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.” ...
Solution to Lab Project 2.1
... 11. Correct answer: B. The syntax of a command gives you the rules for entering that command at the command line. A is incorrect because the syntax of a command does not provide the command's attributes. C is incorrect because the syntax of a command does not provide a list of possible errors create ...
... 11. Correct answer: B. The syntax of a command gives you the rules for entering that command at the command line. A is incorrect because the syntax of a command does not provide the command's attributes. C is incorrect because the syntax of a command does not provide a list of possible errors create ...
Plan 9 from Bell Labs
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Plan 9 from Bell Labs is a distributed operating system, originally developed by the Computing Sciences Research Center at Bell Labs between the mid-1980s and 2002. It takes some of the principles of Unix, developed in the same research group, but extends these to a networked environment with graphics terminals.In Plan 9, virtually all computing resources, including files, network connections, and peripheral devices, are represented through the file system rather than specialized interfaces. A unified network protocol called 9P ties a network of computers running Plan 9 together, allowing them to share all resources so represented.The name Plan 9 from Bell Labs is a reference to the Ed Wood 1959 cult science fiction Z-movie Plan 9 from Outer Space. Also, Glenda, the Plan 9 Bunny, is presumably a reference to Wood's film Glen or Glenda. The system continues to be used and developed by operating system researchers and hobbyists.