05_Concurrency-Mutex&Synchronization
... either a single processor or multiple processors sharing main memory • It is simple and therefore easy to verify • It can be used to support multiple critical sections ...
... either a single processor or multiple processors sharing main memory • It is simple and therefore easy to verify • It can be used to support multiple critical sections ...
Survery of Operating Systems 2nd Edition
... • A setup program for configuring system options • Configuration information stored in a special kind of non‐volatile RAM called the CMOS RAM ...
... • A setup program for configuring system options • Configuration information stored in a special kind of non‐volatile RAM called the CMOS RAM ...
Operating-System Structures
... multiple jobs running concurrently, resources must be allocated to each of them. • Accounting – To keep track of which users use how much and what kinds of computer resources • Protection and security – The owners of information stored in a multi-user or networked computer system may want to control ...
... multiple jobs running concurrently, resources must be allocated to each of them. • Accounting – To keep track of which users use how much and what kinds of computer resources • Protection and security – The owners of information stored in a multi-user or networked computer system may want to control ...
Set 1
... Process termination requires reclaim of any reusable resources Program is passive, process is active, unit of work within system Single-threaded process has one program counter specifying ...
... Process termination requires reclaim of any reusable resources Program is passive, process is active, unit of work within system Single-threaded process has one program counter specifying ...
Client-server - Dipartimento di Informatica
... • Symmetric: each node carries out the same tasks ...
... • Symmetric: each node carries out the same tasks ...
Operating Systems CIS 250
... • Replicator - Windows can copy files from one workstation to another ...
... • Replicator - Windows can copy files from one workstation to another ...
All of the above.
... Q21: Which of the following best describes priority inversion and why it occurs? • A process X with better priority is blocked waiting for a resource held by a process Y with worse priority because the resource is locked by process Y. • A process X with worse priority has its priority improved beca ...
... Q21: Which of the following best describes priority inversion and why it occurs? • A process X with better priority is blocked waiting for a resource held by a process Y with worse priority because the resource is locked by process Y. • A process X with worse priority has its priority improved beca ...
Chap 01 - Introduction
... temporarily while it is being transferred), caching (storing parts of data in faster storage for performance), spooling (the overlapping of output of one job with input of other jobs) ...
... temporarily while it is being transferred), caching (storing parts of data in faster storage for performance), spooling (the overlapping of output of one job with input of other jobs) ...
What is an Operating System?
... Huge range, including denial-of-service, worms, viruses, identity theft, theft of service ...
... Huge range, including denial-of-service, worms, viruses, identity theft, theft of service ...
CS111—Operating System Principles
... Suppose we have a simple machine. How do we get from the raw hardware to the point where an operating system is running the first process, or the process 1 under UNIX? Also, how are processes created in general? It’s a fascinating tale, starting with the notion of a simple computing machine…. ...
... Suppose we have a simple machine. How do we get from the raw hardware to the point where an operating system is running the first process, or the process 1 under UNIX? Also, how are processes created in general? It’s a fascinating tale, starting with the notion of a simple computing machine…. ...
Chapter 1: Introduction
... (open source and free on many platforms - http://www.virtualbox.com) ...
... (open source and free on many platforms - http://www.virtualbox.com) ...
Document
... System software that – manages computer resources, such as memory and input/output devices – provides an interface through which a human can interact with the computer – allows an application program to interact with these other system resources ...
... System software that – manages computer resources, such as memory and input/output devices – provides an interface through which a human can interact with the computer – allows an application program to interact with these other system resources ...
How do Users and Processes interact with the Operating System
... Uses object-oriented–like approach Each core component is separate Each talks to the others over known interfaces Each is loadable as needed within the kernel, so you could download a new device driver for your OS and load it at run-time, or perhaps when a device is plugged in ...
... Uses object-oriented–like approach Each core component is separate Each talks to the others over known interfaces Each is loadable as needed within the kernel, so you could download a new device driver for your OS and load it at run-time, or perhaps when a device is plugged in ...
NETikos activity in MobileMAN project
... • Use of SOAP (Simple Object Access Protocol) to access to remote services, defines a simple way to package information to exchange across systems. ...
... • Use of SOAP (Simple Object Access Protocol) to access to remote services, defines a simple way to package information to exchange across systems. ...
chord_last
... Peer-to-peer system: A distributed system without any centralized control or hierarchical organization, where the software running at each node is equivalent in functionality The goal: Locate the node that stores a particular data item General Idea of Chord: A distributed lookup protocol that, give ...
... Peer-to-peer system: A distributed system without any centralized control or hierarchical organization, where the software running at each node is equivalent in functionality The goal: Locate the node that stores a particular data item General Idea of Chord: A distributed lookup protocol that, give ...
Interfacing with the Operating System
... space and actual memory locations. • We can see how this works by considering computers with a very small amount of memory – le’ts say 4096 bytes. • If the processor used 2 byte integers to hold addresses it could in principle refer to 65536 (2 ** 16) locations. • But only 4096 of these could actual ...
... space and actual memory locations. • We can see how this works by considering computers with a very small amount of memory – le’ts say 4096 bytes. • If the processor used 2 byte integers to hold addresses it could in principle refer to 65536 (2 ** 16) locations. • But only 4096 of these could actual ...
Operating Systems and File Management Learning Steps LAP CC
... 5. A bare- _____________________________ restore includes the operating system, boot program, drivers, software applications, and data necessary to rebuild a replacement hard disk in one easy operation. ...
... 5. A bare- _____________________________ restore includes the operating system, boot program, drivers, software applications, and data necessary to rebuild a replacement hard disk in one easy operation. ...
Solution
... Convenience: An operating system makes a computer more convenient to use. Efficiency: An operating system allows the computer system resources to be used in an efficient manner. Ability to evolve: An operating system should be constructed in such a way as to permit the effective development, testing ...
... Convenience: An operating system makes a computer more convenient to use. Efficiency: An operating system allows the computer system resources to be used in an efficient manner. Ability to evolve: An operating system should be constructed in such a way as to permit the effective development, testing ...
Slides
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them Many types of resources - Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request an ...
... Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them Many types of resources - Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request an ...
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.