OS Basics
... schedule and allocation. Resources mean processor(s), memory, I/Os devices, virtual devices(pipes & Sockets), System timer, Keyboard, displays printer and other such resources which processes (task or threads) request from the OS. ...
... schedule and allocation. Resources mean processor(s), memory, I/Os devices, virtual devices(pipes & Sockets), System timer, Keyboard, displays printer and other such resources which processes (task or threads) request from the OS. ...
anna university chennai:: chennai 600 025
... Free space is maintained as a linked list of nodes with each node having the starting byte address and the ending byte address of a free block. Each memory request consists of the process-id and the amount of storage space required in bytes. Allocated memory space is again maintained as a linked lis ...
... Free space is maintained as a linked list of nodes with each node having the starting byte address and the ending byte address of a free block. Each memory request consists of the process-id and the amount of storage space required in bytes. Allocated memory space is again maintained as a linked lis ...
Distributed Systems, RPC, and Recap
... – usually has a single bus or backplane to which all processors and memories are connected – has very low communication latency – processors communicate through shared memory ...
... – usually has a single bus or backplane to which all processors and memories are connected – has very low communication latency – processors communicate through shared memory ...
2K: A Component-Based Network-Centric Operating System for the
... large numbers of widely distributed peer nodes. Network-centric Operating System is a meta-OS that provides support for any kind of dynamic, heterogeneous environment. ...
... large numbers of widely distributed peer nodes. Network-centric Operating System is a meta-OS that provides support for any kind of dynamic, heterogeneous environment. ...
ppt - Yale "Zoo"
... bucket is associated with each of period. • All ADU’s received by a player that were issued by senders during a given period are stored by the receiver in the bucket corresponding to that interval. • At the end of every interval, all ADUs in that bucket are used by the entity to compute its local vi ...
... bucket is associated with each of period. • All ADU’s received by a player that were issued by senders during a given period are stored by the receiver in the bucket corresponding to that interval. • At the end of every interval, all ADUs in that bucket are used by the entity to compute its local vi ...
OS Concepts - UCL Computer Science
... – Don’t want to rewrite apps for each new CPU, each new I/O device ...
... – Don’t want to rewrite apps for each new CPU, each new I/O device ...
The Evolution of Operating Systems
... While you are waiting for the paper to print you switch over to Netscape and surf the web for a while. This would not be possible without time sharing and multitasking. You would have to wait for the printer to finish before doing anything else! ...
... While you are waiting for the paper to print you switch over to Netscape and surf the web for a while. This would not be possible without time sharing and multitasking. You would have to wait for the printer to finish before doing anything else! ...
Unit I Operating Systems in Distributed Environments
... • 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 Open Standards. ...
... • 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 Open Standards. ...
Chapter 1: Distributed Systems: What is a distributed system?
... Where is the borderline between a computer and a distributed system? Examples of distributed architectures ...
... Where is the borderline between a computer and a distributed system? Examples of distributed architectures ...
Chapter 1: Introduction
... Application programs – define the ways in which the system resources are used to solve the computing problems of the users Word processors, compilers, web browsers, database systems, video games Users People, machines, other computers ...
... Application programs – define the ways in which the system resources are used to solve the computing problems of the users Word processors, compilers, web browsers, database systems, video games Users People, machines, other computers ...
Operating System Overview: Part 1 1 Objectives and functions
... That is those jobs that come late in the batch job list won’t get chance to run until the jobs before them have completed, thus their users have to wait a long time to obtain the results. Some programs may even need interaction with users, which requires the processor to switch to these programs fre ...
... That is those jobs that come late in the batch job list won’t get chance to run until the jobs before them have completed, thus their users have to wait a long time to obtain the results. Some programs may even need interaction with users, which requires the processor to switch to these programs fre ...
Memory Management
... Throughput: application execution can be spread over multiple processors Economy of Scale: shared resources: storage, peripherals, power. Asymmetric Multiprocessing: A master processor gives orders to slaves Symmetric Multiprocessing: Multiprocessors are peers; all share OS structures Blade Serv ...
... Throughput: application execution can be spread over multiple processors Economy of Scale: shared resources: storage, peripherals, power. Asymmetric Multiprocessing: A master processor gives orders to slaves Symmetric Multiprocessing: Multiprocessors are peers; all share OS structures Blade Serv ...
Page 1 Operating System Users and User Programs Hardware
... routine in the OS, and the mode bit is set to monitor mode. The monitor verifies that the parameters are correct and legal, executes the request, and returns control to the instruction following system call. ...
... routine in the OS, and the mode bit is set to monitor mode. The monitor verifies that the parameters are correct and legal, executes the request, and returns control to the instruction following system call. ...
Best-Effort Multimedia Networking Outline
... Software run in kernel to manages a particular vendor’s hardware E.g. Homer Simpson doll with USB ~70% of Linux source code OS is extensible Drivers are the biggest source of OS instability ...
... Software run in kernel to manages a particular vendor’s hardware E.g. Homer Simpson doll with USB ~70% of Linux source code OS is extensible Drivers are the biggest source of OS instability ...
Messenger-Based Operating Systems - (CUI)
... 2.1 Controlling the execution of native CPU code through messengers In terms of the classical distinction between user and kernel mode, messengers occupy the role of an intermediate agent. They ‘sit’ at the transition point between these two modes. It is the messengers which must ask the platform to ...
... 2.1 Controlling the execution of native CPU code through messengers In terms of the classical distinction between user and kernel mode, messengers occupy the role of an intermediate agent. They ‘sit’ at the transition point between these two modes. It is the messengers which must ask the platform to ...
OS_Intro - SIUE Computer Science
... • Understand the purpose of each OS component • Understand how each OS component works ...
... • Understand the purpose of each OS component • Understand how each OS component works ...
- The CLOUDS Lab
... In other words, it the property of a system that hides the heterogeneous and distributed nature of the available resources and presents them to users and applications as a single unified computing resource. ...
... In other words, it the property of a system that hides the heterogeneous and distributed nature of the available resources and presents them to users and applications as a single unified computing resource. ...
OS Components and Structure
... A program is a passive thing -- just a file on the disk with code that is potentially runnable. A process is one instance of a program in execution; at any instance, there may be many processes running copies of a single program (e.g., an editor): each is a separate, independent process. Process B ...
... A program is a passive thing -- just a file on the disk with code that is potentially runnable. A process is one instance of a program in execution; at any instance, there may be many processes running copies of a single program (e.g., an editor): each is a separate, independent process. Process B ...
Orchestra: Supporting Rapid, Collaborative Data Sharing of
... Our target devices may include many non-mote devices ...
... Our target devices may include many non-mote devices ...
NETWORK STRUCTURES
... Users are aware of multiplicity of machines. Access to resources of various machines is done explicitly by: – Remote logging into the appropriate remote machine (ssh, browser) – Transferring data from remote machines to local machines (browser, ssh) Distributed Operating Systems Users not aware of m ...
... Users are aware of multiplicity of machines. Access to resources of various machines is done explicitly by: – Remote logging into the appropriate remote machine (ssh, browser) – Transferring data from remote machines to local machines (browser, ssh) Distributed Operating Systems Users not aware of m ...
Computer Connections: Lesson 6 – Operating Systems
... The most important program on any computer is the Operating System or OS. The OS is a large program made up of many smaller programs that control how the CPU communicates with other hardware components. It also makes computers easier to operate by people who don't understand programming languages. I ...
... The most important program on any computer is the Operating System or OS. The OS is a large program made up of many smaller programs that control how the CPU communicates with other hardware components. It also makes computers easier to operate by people who don't understand programming languages. I ...
MINIX 3: status report and current research
... Instead, we intend to treat each core as a separate computer and not share memory among them. In effect, our approach is to treat a multicore chip more or less like a rack full of independent PCs connected by Ethernet, only smaller. But we are not sure yet quite how this will work out, so we may all ...
... Instead, we intend to treat each core as a separate computer and not share memory among them. In effect, our approach is to treat a multicore chip more or less like a rack full of independent PCs connected by Ethernet, only smaller. But we are not sure yet quite how this will work out, so we may all ...
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.