Operating System
... between more than one processes. By multiprogramming the CPU time is not wasted, because, while one process moves on some I/O work, the OS picks another process to execute till the current one passes to I/O operation. ...
... between more than one processes. By multiprogramming the CPU time is not wasted, because, while one process moves on some I/O work, the OS picks another process to execute till the current one passes to I/O operation. ...
LECT03
... o Each job gets a predetermined “time slice” o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
... o Each job gets a predetermined “time slice” o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
Z - Aidan Hogan
... – If an update is allowed on m2 (Availability), then m1 cannot see the change: (loses Consistency) – To make sure that m1 and m2 have the same, upto-date view (Consistency), neither m1 nor m2 can accept any requests/updates (lose Availability) – Thus, only when m1 and m2 can communicate (lose Partit ...
... – If an update is allowed on m2 (Availability), then m1 cannot see the change: (loses Consistency) – To make sure that m1 and m2 have the same, upto-date view (Consistency), neither m1 nor m2 can accept any requests/updates (lose Availability) – Thus, only when m1 and m2 can communicate (lose Partit ...
Chapter 1: Introduction
... machine easier, more efficient, fault tolerant, secure, … . Example: device drivers and file systems simplify the use of the I/O devices. System View: The OS is an allocator of resources and traffic/event controller. These functions must be done in an efficient and fair manner. Metrics of success ar ...
... machine easier, more efficient, fault tolerant, secure, … . Example: device drivers and file systems simplify the use of the I/O devices. System View: The OS is an allocator of resources and traffic/event controller. These functions must be done in an efficient and fair manner. Metrics of success ar ...
Welcome to NETS3304/3604 Operating System Internals
... However, it is distinguished from other system software: ...
... However, it is distinguished from other system software: ...
DCE - WordPress.com
... DCE services. It is an administrative domain that allows users,machines, and resources to be managed through functions distributed within the network in which they are in. Members working on the same project in an organization are likely belong to the same cell. ...
... DCE services. It is an administrative domain that allows users,machines, and resources to be managed through functions distributed within the network in which they are in. Members working on the same project in an organization are likely belong to the same cell. ...
Operating Systems
... The IBM 360 was the first major computer line to use (small-scale) Ics (Integrated Circuits) CTSS (Compatible Time Sharing System), was developed at M.I.T. ...
... The IBM 360 was the first major computer line to use (small-scale) Ics (Integrated Circuits) CTSS (Compatible Time Sharing System), was developed at M.I.T. ...
Extensibility, Safety and Performance in the SPIN Operating System
... Protocol processing Scheduling and thread management Virtual memory ...
... Protocol processing Scheduling and thread management Virtual memory ...
CS 519 Operating Systems Theory Spring 1998
... mechanism: data structures and operations that implement the abstraction (e.g. the buffer cache) policy: the procedure that guides the selection of a certain course of action from among alternatives (e.g. the replacement policy for the buffer cache) traditional OS is rigid: mechanism together with p ...
... mechanism: data structures and operations that implement the abstraction (e.g. the buffer cache) policy: the procedure that guides the selection of a certain course of action from among alternatives (e.g. the replacement policy for the buffer cache) traditional OS is rigid: mechanism together with p ...
CS111—Operating System Principles
... fast as electronic memory? How to make insecure, unreliable network transmissions appear to be reliable and secure? How to make many physical machines appear to be a single machine? ...
... fast as electronic memory? How to make insecure, unreliable network transmissions appear to be reliable and secure? How to make many physical machines appear to be a single machine? ...
Test1
... 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? What are the two modes of Inter-process communication (IPC)? What are the strengths and weaknesses of these approaches? The ...
... 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? What are the two modes of Inter-process communication (IPC)? What are the strengths and weaknesses of these approaches? The ...
Systems Software
... Small programs How to communicate with a device Plug and Play Device device drivers included with systems software Makes devices immediately usable ...
... Small programs How to communicate with a device Plug and Play Device device drivers included with systems software Makes devices immediately usable ...
Computers: Tools for an Information Age
... Describe the methods of resource allocation on large computers Describe the differences among multiprocessing, multiprogramming, and time-sharing Explain the principles of memory management List several functions that are typically performed by utility programs Copyright © 2003 by Prentice Hall ...
... Describe the methods of resource allocation on large computers Describe the differences among multiprocessing, multiprogramming, and time-sharing Explain the principles of memory management List several functions that are typically performed by utility programs Copyright © 2003 by Prentice Hall ...
Chapter03 - Home - KSU Faculty Member websites
... Describe the methods of resource allocation on large computers Describe the differences among multiprocessing, multiprogramming, and time-sharing Explain the principles of memory management List several functions that are typically performed by utility programs Copyright © 2003 by Prentice Hall ...
... Describe the methods of resource allocation on large computers Describe the differences among multiprocessing, multiprogramming, and time-sharing Explain the principles of memory management List several functions that are typically performed by utility programs Copyright © 2003 by Prentice Hall ...
Chapter 1 Basic Concepts of Operating Systems
... • The overall structure of an operating system is divided into the various software components using a topdown (layered) approach. • The top layer provides the easiest interface to the human operators and users interacting with the system. • Any layer uses the services or functions provided by the n ...
... • The overall structure of an operating system is divided into the various software components using a topdown (layered) approach. • The top layer provides the easiest interface to the human operators and users interacting with the system. • Any layer uses the services or functions provided by the n ...
p2-demo1
... The main reason for errors at runtime of a system is complexity. Separation and encapsulation of functionality in modules with minimal, clear, and well-defined interaction between components has two effects: • Lowering complexity with the result that fewer errors are introduced by programmers. • Mal ...
... The main reason for errors at runtime of a system is complexity. Separation and encapsulation of functionality in modules with minimal, clear, and well-defined interaction between components has two effects: • Lowering complexity with the result that fewer errors are introduced by programmers. • Mal ...
PDF
... and getting speed-up proportional to the number of machines m Distributed computing focused on harnessing resources (hardware or data) from geographically dispersed machines r Hardware m SIMD, MIMD, MPPs, SMPs, NOWs, COWs,… m Tightly or Loosely Coupled machines? Do they share memory? Do they share a ...
... and getting speed-up proportional to the number of machines m Distributed computing focused on harnessing resources (hardware or data) from geographically dispersed machines r Hardware m SIMD, MIMD, MPPs, SMPs, NOWs, COWs,… m Tightly or Loosely Coupled machines? Do they share memory? Do they share a ...
PowerPoint XP
... Clean virtual machine Hardware independence Resource sharing and management Long term data storage Protection, security, accounting Real time support, parallelism, human interface ...
... Clean virtual machine Hardware independence Resource sharing and management Long term data storage Protection, security, accounting Real time support, parallelism, human interface ...
COS 598: Advanced Operating System
... Why do we have two modes of execution? How does the OS protect the memory space of a user process? • How does the OS ensure that a user cannot monopolize the system? • What is a process? • What is a thread? ...
... Why do we have two modes of execution? How does the OS protect the memory space of a user process? • How does the OS ensure that a user cannot monopolize the system? • What is a process? • What is a thread? ...
Operating systems
... Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, printing, and other resources. For hardware functions such as input and output and memory allocation, the operating system acts ...
... Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, printing, and other resources. For hardware functions such as input and output and memory allocation, the operating system acts ...
Introduction - University of Pennsylvania
... OS maintains an internal table, called page table, that keeps track of which blocks of P are in memory If Add1 is not in memory, MMU generates a page fault, and transfers control to OS OS examines the cause, and initiates a disk transfer to load in the relevant block of P OS needs to decide ...
... OS maintains an internal table, called page table, that keeps track of which blocks of P are in memory If Add1 is not in memory, MMU generates a page fault, and transfers control to OS OS examines the cause, and initiates a disk transfer to load in the relevant block of P OS needs to decide ...
Distributed operating system
A distributed operating system is a software over a collection of independent, networked, communicating, and physically separate computational nodes. Each individual node holds a specific software subset of the global aggregate operating system. Each subset is a composite of two distinct service provisioners. The first is a ubiquitous minimal kernel, or microkernel, that directly controls that node’s hardware. Second is a higher-level collection of system management components that coordinate the node's individual and collaborative activities. These components abstract microkernel functions and support user applications.The microkernel and the management components collection work together. They support the system’s goal of integrating multiple resources and processing functionality into an efficient and stable system. This seamless integration of individual nodes into a global system is referred to as transparency, or single system image; describing the illusion provided to users of the global system’s appearance as a single computational entity.