Slide Set 1
... A thread, or thread of execution, is the set of instructions being executed in a process. In a single thread system each process has exactly one execution engine (the logical machine). In a multi-thread environment, a process may have many execution engines, one for each thread. Thus, each thread ha ...
... A thread, or thread of execution, is the set of instructions being executed in a process. In a single thread system each process has exactly one execution engine (the logical machine). In a multi-thread environment, a process may have many execution engines, one for each thread. Thus, each thread ha ...
An operating System
... Memory management refers to management of Primary Memory or Main Memory. Main memory is a large array of words or bytes where each word or byte has its own address. Main memory provides a fast storage that can be access directly by the CPU. So for a program to be executed, it must in the main memor ...
... Memory management refers to management of Primary Memory or Main Memory. Main memory is a large array of words or bytes where each word or byte has its own address. Main memory provides a fast storage that can be access directly by the CPU. So for a program to be executed, it must in the main memor ...
Operating Systems Sample Exam Questions and Answers Tommy Sailing
... - PC register shifts to the beginning of the other application’s instruction ...
... - PC register shifts to the beginning of the other application’s instruction ...
Operating system organization
... resources (especially processor and memory) Every design issue MUST be evaluated wrt its contribution to functionality of system AND ...
... resources (especially processor and memory) Every design issue MUST be evaluated wrt its contribution to functionality of system AND ...
ICOM 4015 - Advanced Programming
... An OS is (after initial setup) an interrupt-driven program Interrupts may come from: I/O devices Timer interrupts - time slicing and hangup recovery Software interrupts - system call mechanism ...
... An OS is (after initial setup) an interrupt-driven program Interrupts may come from: I/O devices Timer interrupts - time slicing and hangup recovery Software interrupts - system call mechanism ...
02_OperatingSystemOverview
... • Multiple jobs in memory must be protected from each other’s data • File system must be protected so that only authorised users can access • Contention for resources must be handled – Printers, storage etc ...
... • Multiple jobs in memory must be protected from each other’s data • File system must be protected so that only authorised users can access • Contention for resources must be handled – Printers, storage etc ...
What is an Operating System?
... When it has to wait (for I/O for example), OS switches to another job ...
... When it has to wait (for I/O for example), OS switches to another job ...
process - Erciyes Üniversitesi IIBF
... When it has to wait (for I/O for example), OS switches to another job Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing Response time should be < 1 second Each use ...
... When it has to wait (for I/O for example), OS switches to another job Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing Response time should be < 1 second Each use ...
- Saraswathi Velu College of Engineering
... A more common definition is that the OS is the one program running at all times on the computer ,usually called the kernel, with all else being application programs. 3.What are batch systems? Batch systems are quite appropriate for executing large jobs that need little interaction. The user can subm ...
... A more common definition is that the OS is the one program running at all times on the computer ,usually called the kernel, with all else being application programs. 3.What are batch systems? Batch systems are quite appropriate for executing large jobs that need little interaction. The user can subm ...
Introduction to Operating Systems
... Services that provide user-interfaces to OS Program execution - load program into memory and run it I/O Operations - since users cannot execute I/O operations directly File System Manipulation - read, write, create, delete files Communications - interprocess and intersystem Error Detection - ...
... Services that provide user-interfaces to OS Program execution - load program into memory and run it I/O Operations - since users cannot execute I/O operations directly File System Manipulation - read, write, create, delete files Communications - interprocess and intersystem Error Detection - ...
CS 355: Introduction to Systems Programming
... Understand the role of systems programming; Have hands-on knowledge of the basic principles of Unix system calls; Have hands-on knowledge of the basic principles of Unix file system; Have hands-on knowledge of the basic principles of Unix IO system; Design and implement system-level applic ...
... Understand the role of systems programming; Have hands-on knowledge of the basic principles of Unix system calls; Have hands-on knowledge of the basic principles of Unix file system; Have hands-on knowledge of the basic principles of Unix IO system; Design and implement system-level applic ...
PPT
... Devices that are supported What hardware platforms does it run on? Applications that are available for that OS Who developed the code? Who supports the code? How often does the system crash? Reliability? Do you pay for it? ...
... Devices that are supported What hardware platforms does it run on? Applications that are available for that OS Who developed the code? Who supports the code? How often does the system crash? Reliability? Do you pay for it? ...
Network File System
... (b) File Descriptors: In UNIX and Windows, fds are unique to each process. In VxWorks fds are global entities, accessible by any task except for std input, std output and std error which can be task specific. (c) I/O Control: The specific parameters passed to ioctl() functions can differ between UNI ...
... (b) File Descriptors: In UNIX and Windows, fds are unique to each process. In VxWorks fds are global entities, accessible by any task except for std input, std output and std error which can be task specific. (c) I/O Control: The specific parameters passed to ioctl() functions can differ between UNI ...
Operating Systems Overview.key
... represent a logical abstraction of permanent storage; an individual file serves as the logical storage unit Files and file systems provide a uniform model under which a wide variety of devices — magnetic disks, optical disks, flash drives, tapes — may be accessed Files not only contain stored data b ...
... represent a logical abstraction of permanent storage; an individual file serves as the logical storage unit Files and file systems provide a uniform model under which a wide variety of devices — magnetic disks, optical disks, flash drives, tapes — may be accessed Files not only contain stored data b ...
Nodes of a distributed system
... its organization as a tightly coupled software on a loosely coupled hardware. This is an ideal picture. ■ For a DS, a single global IPC so that any process can talk to any process. Not accepted: Different mechanisms on different machines, or one mechanism for local communication and something else f ...
... its organization as a tightly coupled software on a loosely coupled hardware. This is an ideal picture. ■ For a DS, a single global IPC so that any process can talk to any process. Not accepted: Different mechanisms on different machines, or one mechanism for local communication and something else f ...
1.01
... One job selected and run via job scheduling When it has to wait (for I/O for example), OS switches to another job Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing R ...
... One job selected and run via job scheduling When it has to wait (for I/O for example), OS switches to another job Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing R ...
File
... 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 – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
... 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 – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
MEMORY MANAGEMENT
... A and B, exist in portions of main memory. That is, a block of memory is allocated to each process that contains the program, data, and context information. Each process is recorded in a process list built and maintained by the OS. The process list contains one entry for each process, which includes ...
... A and B, exist in portions of main memory. That is, a block of memory is allocated to each process that contains the program, data, and context information. Each process is recorded in a process list built and maintained by the OS. The process list contains one entry for each process, which includes ...
CENG334 Introduction to Operating Systems
... 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 ...
... 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 ...
Hardware
... Mainly consist of a hardware which is located inside the CPU. This is physically existing hardware, where the data is stored and is accessed. ...
... Mainly consist of a hardware which is located inside the CPU. This is physically existing hardware, where the data is stored and is accessed. ...
Solaris Zones: Operating System Support for Server Consolidation Andrew Tucker David Comay
... ronment, rather than the physical hardware [5, 6, 7]. These efforts differ from virtual machine implementations in that there is only one underlying operating system kernel, which is enhanced to provide increased isolation between groups of processes. The result is the ability to run multiple applic ...
... ronment, rather than the physical hardware [5, 6, 7]. These efforts differ from virtual machine implementations in that there is only one underlying operating system kernel, which is enhanced to provide increased isolation between groups of processes. The result is the ability to run multiple applic ...
The Styx Architecture for Distributed Systems
... The directories under /net are similar to those in Plan 9 or Inferno; they form the interface to the external IP network. The /trip hierarchy represents the control structure of the shelf. The subdirectories under /trip/boot each provide access to one of the line cards or other devices in the shelf. ...
... The directories under /net are similar to those in Plan 9 or Inferno; they form the interface to the external IP network. The /trip hierarchy represents the control structure of the shelf. The subdirectories under /trip/boot each provide access to one of the line cards or other devices in the shelf. ...