Operating-System Structures - Stanford Computer Graphics
... operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing either on the same computer or on different systems tied toge ...
... operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing either on the same computer or on different systems tied toge ...
Computer Science 8530 Advanced Operating Systems Fall 2016
... code is executed is usually done with a special instruction associated with the particular system architecture being used. Identify at least one instruction that can accomplish this transition on the Intel x86 architecture and one the ARM architecture. 7. What’s the difference between apparent co ...
... code is executed is usually done with a special instruction associated with the particular system architecture being used. Identify at least one instruction that can accomplish this transition on the Intel x86 architecture and one the ARM architecture. 7. What’s the difference between apparent co ...
System Structures
... Operating systems are designed to run on any of a class of machines; the system must be configured for each specific computer site ...
... Operating systems are designed to run on any of a class of machines; the system must be configured for each specific computer site ...
9. Application/Kernel Interface
... Access to non-existent page of the process → no error but need to allocate (and maybe copy) a page on demand Access to a page outside the process space → issue a segmentation/page fault The kernel function itself is buggy and accesses and illegal address → call oops() (possibly leading to “kernel pa ...
... Access to non-existent page of the process → no error but need to allocate (and maybe copy) a page on demand Access to a page outside the process space → issue a segmentation/page fault The kernel function itself is buggy and accesses and illegal address → call oops() (possibly leading to “kernel pa ...
ch2
... – File-system manipulation - The file system is of particular interest. Obviously, 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. Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. ...
Test 1 Operating Systems and Networking CS
... answer. If processes within a system communicated via message passing without using shared memory, would we still insist on it? State your reason. Consider the following diagram that purports to depict a mouse that could be moved around and the monitor screen that displays it as a cursor motion. Wha ...
... answer. If processes within a system communicated via message passing without using shared memory, would we still insist on it? State your reason. Consider the following diagram that purports to depict a mouse that could be moved around and the monitor screen that displays it as a cursor motion. Wha ...
Slides About Systems - Duke Database Devils
... Large, long-lived software systems are like buildings. They are built by workers using standard design patterns. They depend on some underlying infrastructure. But they can evolve and are not limited by the laws of physics. ...
... Large, long-lived software systems are like buildings. They are built by workers using standard design patterns. They depend on some underlying infrastructure. But they can evolve and are not limited by the laws of physics. ...
Test1_soln
... 6. What is the purpose of a system call? How do the system calls relate to the underlying operating system and to the concept of dual-mode (kernel-mode and user-mode) operations? Ans. The purpose of a system call issued by a process is to get something done by the OS, which it cannot do. This makes ...
... 6. What is the purpose of a system call? How do the system calls relate to the underlying operating system and to the concept of dual-mode (kernel-mode and user-mode) operations? Ans. The purpose of a system call issued by a process is to get something done by the OS, which it cannot do. This makes ...
1 - Erode Sengunthar Engineering College
... 14.what is meant by mechanism and policy? Mechanism determines how to do something ; Policies determines what will be done ; Policies are likely to change in the underlying mechanism. A general mechanism would be more desirable. A change in policy would then require redefinition of only certain para ...
... 14.what is meant by mechanism and policy? Mechanism determines how to do something ; Policies determines what will be done ; Policies are likely to change in the underlying mechanism. A general mechanism would be more desirable. A change in policy would then require redefinition of only certain para ...
COS 318: Operating Systems OS Structures and System Calls Prof. Margaret Martonosi
... switch to kernel stack check R0 call the real code pointed by R0 place result in Rresult switch to user stack restore context iret (change to user mode and return) ...
... switch to kernel stack check R0 call the real code pointed by R0 place result in Rresult switch to user stack restore context iret (change to user mode and return) ...
Lecture 3
... I/O operations - A running program may require I/O, which may involve a file or an I/O device. File-system manipulation - The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permissio ...
... I/O operations - A running program may require I/O, which may involve a file or an I/O device. File-system manipulation - The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permissio ...
2005-07.pdf
... Yes, although it may not be very efficient. The basic idea in this case is to have only very small interrupt handlers that immediately schedule the associated handler process, then call the scheduler, who subsequently selects the handler. This scheme does require that handlers get top priority. When ...
... Yes, although it may not be very efficient. The basic idea in this case is to have only very small interrupt handlers that immediately schedule the associated handler process, then call the scheduler, who subsequently selects the handler. This scheme does require that handlers get top priority. When ...
Introduction to UNIX System
... as diagram on the next slide. Each one contains specific types of file. The details may vary between different Unix systems, but these directories should be common to all. ...
... as diagram on the next slide. Each one contains specific types of file. The details may vary between different Unix systems, but these directories should be common to all. ...
hand-out - Jan Thorbecke
... • The system call interface invokes intended system call in OS kernel and returns status of the system call and any return values • The caller need know nothing about how the system call is implemented • Just needs to obey API and understand what OS will do as a result call • Most details of OS inte ...
... • The system call interface invokes intended system call in OS kernel and returns status of the system call and any return values • The caller need know nothing about how the system call is implemented • Just needs to obey API and understand what OS will do as a result call • Most details of OS inte ...
Chorus and other Microkernels
... contiguous regions that map a portion of a segment into physical memory. – System actors called “Mappers” manage segments, allocating regions as needed. ...
... contiguous regions that map a portion of a segment into physical memory. – System actors called “Mappers” manage segments, allocating regions as needed. ...
COS 318: Operating Systems OS Structures and System Calls Andy Bavier
... (Assume passing parameters in registers) ...
... (Assume passing parameters in registers) ...
Protection
... Malicious application can’t take control User data is protected from untrusted users and programs ...
... Malicious application can’t take control User data is protected from untrusted users and programs ...
Ceng 334 - Operating Systems
... second that the process has had during the past few seconds Nice is a value between –20 to 20 (default 0). Nice system call can be used to set this value 0-20 Base is a system parameter in UNIX source code The scheduler forces CPU bound (on positive queues) get any service that is left over when all ...
... second that the process has had during the past few seconds Nice is a value between –20 to 20 (default 0). Nice system call can be used to set this value 0-20 Base is a system parameter in UNIX source code The scheduler forces CPU bound (on positive queues) get any service that is left over when all ...
virtual machine
... • UNIX – limited by hardware functionality, the original UNIX operating system had limited structuring. ...
... • UNIX – limited by hardware functionality, the original UNIX operating system had limited structuring. ...
Overview of Operating Systems
... how OS design can impact program performance Understand concurrency, and learn of the problems (such as race conditions) and tools used to solve them (such as semaphores) Learn major features of the POSIX API ...
... how OS design can impact program performance Understand concurrency, and learn of the problems (such as race conditions) and tools used to solve them (such as semaphores) Learn major features of the POSIX API ...
application programs
... programs. The user does not have to worry about memory allocation or CPU scheduling. I/O Operations Each program requires input and produces output. The OS hides some of the details of the underlying hardware for such I/O. All the user sees is that the I/O has been performed, without those details ...
... programs. The user does not have to worry about memory allocation or CPU scheduling. I/O Operations Each program requires input and produces output. The OS hides some of the details of the underlying hardware for such I/O. All the user sees is that the I/O has been performed, without those details ...
An Introduction to Operating Systems
... OS provides an environment where the user can conveniently run programs. The user does not have to worry about memory allocation or CPU scheduling. ¾ I/O Operations Each program requires input and produces output. The OS hides some of the details of the underlying hardware for such I/O. All the user ...
... OS provides an environment where the user can conveniently run programs. The user does not have to worry about memory allocation or CPU scheduling. ¾ I/O Operations Each program requires input and produces output. The OS hides some of the details of the underlying hardware for such I/O. All the user ...
quiz1-s3
... Turn off interrupts. d) Access I/O device. 2. Which of the following would lead you to believe that a given system is an SMP-type system? a) Each processor is assigned a specific task. b) There is a boss–worker relationship between the processors. c) Each processor performs all tasks within the oper ...
... Turn off interrupts. d) Access I/O device. 2. Which of the following would lead you to believe that a given system is an SMP-type system? a) Each processor is assigned a specific task. b) There is a boss–worker relationship between the processors. c) Each processor performs all tasks within the oper ...
