OSreviewS2004
... • CPU utilization – keep the CPU as busy as possible • Throughput – # of processes that complete their execution per time unit • Turnaround time – amount of time to execute a particular process (finishing time – arrival time) • Waiting time – amount of time a process has been waiting in the ready qu ...
... • CPU utilization – keep the CPU as busy as possible • Throughput – # of processes that complete their execution per time unit • Turnaround time – amount of time to execute a particular process (finishing time – arrival time) • Waiting time – amount of time a process has been waiting in the ready qu ...
Computers: Tools for an Information Age
... Resource allocation: assigning and computer resources to certain programs and processes for their use This problem was raised when people designed the OS for large computers with multiple users. It is also a fundamental problem for modern OS for PC. Main issues related to resource allocation Shari ...
... Resource allocation: assigning and computer resources to certain programs and processes for their use This problem was raised when people designed the OS for large computers with multiple users. It is also a fundamental problem for modern OS for PC. Main issues related to resource allocation Shari ...
Course Syllabus
... 15. Summarize the range of mechanisms that can be employed at the operating system level to realize concurrent systems and describe the benefits of each. 16. Explain the different states that a task may pass through and the data structures needed to support the management of many tasks. 17. Summariz ...
... 15. Summarize the range of mechanisms that can be employed at the operating system level to realize concurrent systems and describe the benefits of each. 16. Explain the different states that a task may pass through and the data structures needed to support the management of many tasks. 17. Summariz ...
Dilma M. da Silva IBM TJ Watson Research Center - IC
... Dependability via Virtual Machines” (Univ of Karlsruhe, Germany) – Run unmodified device driver (DD), with its original OS, in a virtual machine; export access to the device to other hosted virtual machines – Client VMs run a stub driver to communicate with the driver VM – Describes solutions for is ...
... Dependability via Virtual Machines” (Univ of Karlsruhe, Germany) – Run unmodified device driver (DD), with its original OS, in a virtual machine; export access to the device to other hosted virtual machines – Client VMs run a stub driver to communicate with the driver VM – Describes solutions for is ...
Module 3: Operating
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation –programs need to read and write files and directories, create and delete them, search them, list file Information, permission management ...
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation –programs need to read and write files and directories, create and delete them, search them, list file Information, permission management ...
WSO2006-overview-con..
... Dependability via Virtual Machines” (Univ of Karlsruhe, Germany) – Run unmodified device driver (DD), with its original OS, in a virtual machine; export access to the device to other hosted virtual machines – Client VMs run a stub driver to communicate with the driver VM – Describes solutions for is ...
... Dependability via Virtual Machines” (Univ of Karlsruhe, Germany) – Run unmodified device driver (DD), with its original OS, in a virtual machine; export access to the device to other hosted virtual machines – Client VMs run a stub driver to communicate with the driver VM – Describes solutions for is ...
Operating Systems History
... has the basic routines of an OS. • Some OS use the microkernel concept, this have the function to coordinate to the other parts of an OS such as : I/O Devices, Process, Memory and File Systems. • The structure of and OS could be different but in most of the time are very similar because some OS use ...
... has the basic routines of an OS. • Some OS use the microkernel concept, this have the function to coordinate to the other parts of an OS such as : I/O Devices, Process, Memory and File Systems. • The structure of and OS could be different but in most of the time are very similar because some OS use ...
Transparency Description
... More complex computing problems Grosch’s Law CPU speed will not increase by time ...
... More complex computing problems Grosch’s Law CPU speed will not increase by time ...
Course Introduction - Washington University in St. Louis
... A great starting resource for kernel hackers Other class readings are relatively current documents about the Linux kernel Plan to look at a lot of source code in your “spare” time Course website provides a number of free/online references ...
... A great starting resource for kernel hackers Other class readings are relatively current documents about the Linux kernel Plan to look at a lot of source code in your “spare” time Course website provides a number of free/online references ...
Chapter 1: Introduction to Computers
... o command-line (DOS) interface o graphical (Windows) interface ...
... o command-line (DOS) interface o graphical (Windows) interface ...
Principles of Operating Systems
... • Resource allocation among users, applications • Isolation of different users, applications from each other • Communication between users, applications ...
... • Resource allocation among users, applications • Isolation of different users, applications from each other • Communication between users, applications ...
Inside and Outside the OS
... Effort to assure that every application program responds in similar ways to user ...
... Effort to assure that every application program responds in similar ways to user ...
All of the above.
... • It starts all of the commands in a pipeline in separate processes, redirecting the output from each command to be the input to the next command in the pipeline. The commands run in parallel. • It starts all of the commands in a pipeline and runs them one after another in the shell process. As each ...
... • It starts all of the commands in a pipeline in separate processes, redirecting the output from each command to be the input to the next command in the pipeline. The commands run in parallel. • It starts all of the commands in a pipeline and runs them one after another in the shell process. As each ...
Operating Systems - sacredheartmalta.org
... 2. Control access of users to different resources 3. Provide administration features such as security. ...
... 2. Control access of users to different resources 3. Provide administration features such as security. ...
Windows XP Kernel Architecture
... Object Manager • Executive Component that manages objects (physical and logical resources) • Objects are access through object handles • Kernel-mode components can access objects directly through pointers and through kernel handles (handles only accessible through kernel-mode) ...
... Object Manager • Executive Component that manages objects (physical and logical resources) • Objects are access through object handles • Kernel-mode components can access objects directly through pointers and through kernel handles (handles only accessible through kernel-mode) ...
Chapter 8 Operating Systems and Utility Programs
... What are three categories of operating systems? Stand-alone: complete operating system working on PC, laptop, mobile computing device. like DOS, Windows, Mac OS X, Unix, Linux Network: OS designed specially to support a network, like netware, windows server 2003,Unix, Linux and Solaris Embedded : OS ...
... What are three categories of operating systems? Stand-alone: complete operating system working on PC, laptop, mobile computing device. like DOS, Windows, Mac OS X, Unix, Linux Network: OS designed specially to support a network, like netware, windows server 2003,Unix, Linux and Solaris Embedded : OS ...
Document
... Traditional Operating System: Disadvantages The kernel manages resources. Different applications have different needs for resources. One generalized OS cannot satisfy all the resource needs from various applications. As a result, application performances are compromised. ...
... Traditional Operating System: Disadvantages The kernel manages resources. Different applications have different needs for resources. One generalized OS cannot satisfy all the resource needs from various applications. As a result, application performances are compromised. ...
CSS430: Introduction - UW Faculty Web Server
... This is a logical extension of multiprogramming. Each user has at least one separate program in memory. A program in execution is referred to as a process. Process switch occur so frequently that the users can interact with each program while it is running. File system allows users to access data an ...
... This is a logical extension of multiprogramming. Each user has at least one separate program in memory. A program in execution is referred to as a process. Process switch occur so frequently that the users can interact with each program while it is running. File system allows users to access data an ...
What is the Linux Kernel?
... What is the Linux Kernel? The Heart of the Linux Operating System Provides for the efficient management of system resources: CPU ...
... What is the Linux Kernel? The Heart of the Linux Operating System Provides for the efficient management of system resources: CPU ...
Ceng 334 - Operating Systems
... map to speed up the process (one pass instead of two) for large memories • When page daemon runs, it first clears the R bit at the front hand, and then checks the R bit at the back hand, after which it advances both hands • Each time the page daemon runs, the hands rotate less than a full revolution ...
... map to speed up the process (one pass instead of two) for large memories • When page daemon runs, it first clears the R bit at the front hand, and then checks the R bit at the back hand, after which it advances both hands • Each time the page daemon runs, the hands rotate less than a full revolution ...
CMPS431 Syllabus, Fall 2009
... Describe how issues such as open source software and the increased use of the Internet are influencing operating system design. Explain the concept of a logical layer. Explain the benefits of building abstract layers in hierarchical fashion. Defend the need for APIs and middleware. Describe how comp ...
... Describe how issues such as open source software and the increased use of the Internet are influencing operating system design. Explain the concept of a logical layer. Explain the benefits of building abstract layers in hierarchical fashion. Defend the need for APIs and middleware. Describe how comp ...
Operating Systems Operating System (OS) CS 217
... OS gains control through trap, switches to supervisor model, performs service, switches back to user mode, and gives control back to user ...
... OS gains control through trap, switches to supervisor model, performs service, switches back to user mode, and gives control back to user ...
Lecture 5
... and users who do not need to know these details. • High-level languages are very hard to implement without an OS. Platform-independence is not practical. • In a system without an OS, such as a microcontroller used with a small embedded system, we either use Assembly or very low level C code. I/O oft ...
... and users who do not need to know these details. • High-level languages are very hard to implement without an OS. Platform-independence is not practical. • In a system without an OS, such as a microcontroller used with a small embedded system, we either use Assembly or very low level C code. I/O oft ...
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.