ppt
... mouse event, keyboard, Ethernet packet arrives etc. This type of processes are in ready/running state only for a short period of time, and are mostly in waiting state: E.g. update mouse cursor after mouse movement, show a ...
... mouse event, keyboard, Ethernet packet arrives etc. This type of processes are in ready/running state only for a short period of time, and are mostly in waiting state: E.g. update mouse cursor after mouse movement, show a ...
gst_115_9
... difference between a PC slot network card and one that plugs directly into the bus. A PC card is the preferred method of connecting a laptop to a network when possible. One major drawback of PC cards is configuration. If you're using a plug-and-play computer and operating system, then set-up is usua ...
... difference between a PC slot network card and one that plugs directly into the bus. A PC card is the preferred method of connecting a laptop to a network when possible. One major drawback of PC cards is configuration. If you're using a plug-and-play computer and operating system, then set-up is usua ...
Instructor Slides - Electrical and Computer Engineering
... – All such systems interact with the environment. – System failure can have catastrophic consequences. – System correctness depends on both logical results and the time at which results are produced (real-time). 2. Performance – Safety is number#1 requirement, but we still need to achieve sufficient ...
... – All such systems interact with the environment. – System failure can have catastrophic consequences. – System correctness depends on both logical results and the time at which results are produced (real-time). 2. Performance – Safety is number#1 requirement, but we still need to achieve sufficient ...
Module 4: Processes
... Processes must name each other explicitly: send (P, message) – send a message to process P receive(Q, message) – receive a message from process Q Properties of communication link Links are established automatically. A link is associated with exactly one pair of communicating ...
... Processes must name each other explicitly: send (P, message) – send a message to process P receive(Q, message) – receive a message from process Q Properties of communication link Links are established automatically. A link is associated with exactly one pair of communicating ...
OS_Ch02m - KSU Web Home
... Process management is one of the major functions of the operating system; it involves creating processes and controlling their execution. In most operating systems, several processes are stored in memory at the same time and the operating system (OS) manages the sharing of the CPU and other resource ...
... Process management is one of the major functions of the operating system; it involves creating processes and controlling their execution. In most operating systems, several processes are stored in memory at the same time and the operating system (OS) manages the sharing of the CPU and other resource ...
Preserving Computing`s Past: Restoration and Simulation
... brought to Australia; the window of opportunity for collecting them is still open. The collection has grown significantly during the last 25 years. At the present time, we have in Sydney a comprehensive collection of most early Digital machines, including hardware, manuals, software, and spares (see ...
... brought to Australia; the window of opportunity for collecting them is still open. The collection has grown significantly during the last 25 years. At the present time, we have in Sydney a comprehensive collection of most early Digital machines, including hardware, manuals, software, and spares (see ...
Introduction:- CS-502 Operating Systems
... sharing: how are resources shared across users? naming: how are resources named (by users or programs)? security: how is the integrity of the OS and its resources ensured? protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happen ...
... sharing: how are resources shared across users? naming: how are resources named (by users or programs)? security: how is the integrity of the OS and its resources ensured? protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happen ...
Slide 1
... A peer-to-peer (P2P) network is a distributed system in which peers employ distributed resources to perform a critical function in a decentralized fashion [LW2004] Classification of P2P networks ...
... A peer-to-peer (P2P) network is a distributed system in which peers employ distributed resources to perform a critical function in a decentralized fashion [LW2004] Classification of P2P networks ...
StructuredNetwork - NUS School of Computing
... A peer-to-peer (P2P) network is a distributed system in which peers employ distributed resources to perform a critical function in a decentralized fashion [LW2004] Classification of P2P networks ...
... A peer-to-peer (P2P) network is a distributed system in which peers employ distributed resources to perform a critical function in a decentralized fashion [LW2004] Classification of P2P networks ...
HPC Software Requirements to Support an HPC Cluster
... exchange of data between the individual computers. This network is normally based on InfiniBand technology and allows the individual computers to work together on problems that can be divided across multiple computers. The parts of these parallel programs execute independently and synchronize using ...
... exchange of data between the individual computers. This network is normally based on InfiniBand technology and allows the individual computers to work together on problems that can be divided across multiple computers. The parts of these parallel programs execute independently and synchronize using ...
Lesson 10
... Decentralised: • router knows physically-connected neighbours, i.e link costs to neighbours • iterative process of computation, exchange of info with neighbours • Known as “distance vector” algorithms • E.g. Bellman-Ford Algorithm ...
... Decentralised: • router knows physically-connected neighbours, i.e link costs to neighbours • iterative process of computation, exchange of info with neighbours • Known as “distance vector” algorithms • E.g. Bellman-Ford Algorithm ...
File System Maintenance (continued)
... File System Maintenance • Basic rules for creating a file structure: – different versions of software in their own directories – data files in directories on the basis of their functions – Design home directories to match the functions of users in an organization – Group files with similar security ...
... File System Maintenance • Basic rules for creating a file structure: – different versions of software in their own directories – data files in directories on the basis of their functions – Design home directories to match the functions of users in an organization – Group files with similar security ...
Lecture 2 - Rabie A. Ramadan
... 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 multiuser or networked computer system may want to control use of that information, concurrent processes should not interfere with each other ...
... 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 multiuser or networked computer system may want to control use of that information, concurrent processes should not interfere with each other ...
device special files
... – A device uses the computer’s resources to enable it to function and communicate with the computer. – A computer’s resources include the interrupt request (IRQ) line and one or more I/O address ranges. • The IRQ line is a channel within the computer that is used for communication with the central p ...
... – A device uses the computer’s resources to enable it to function and communicate with the computer. – A computer’s resources include the interrupt request (IRQ) line and one or more I/O address ranges. • The IRQ line is a channel within the computer that is used for communication with the central p ...
DOC - MikeKogan.Com
... May 1995 to June 1996 Chief architect. Led the design and implementation of MEMOS, a portable embedded operating system for oneand two-way wireless platforms (Motorola PageWriter 2000). Responsible for the kernel, device drivers, storage mechanisms, power management, communications/radio drivers, an ...
... May 1995 to June 1996 Chief architect. Led the design and implementation of MEMOS, a portable embedded operating system for oneand two-way wireless platforms (Motorola PageWriter 2000). Responsible for the kernel, device drivers, storage mechanisms, power management, communications/radio drivers, an ...
Michael S. Kogan - Mike Kogan Expert Computer
... May 1995 to June 1996 Chief architect. Led the design and implementation of MEMOS, a portable embedded operating system for oneand two-way wireless platforms (Motorola PageWriter 2000). Responsible for the kernel, device drivers, storage mechanisms, power management, communications/radio drivers, an ...
... May 1995 to June 1996 Chief architect. Led the design and implementation of MEMOS, a portable embedded operating system for oneand two-way wireless platforms (Motorola PageWriter 2000). Responsible for the kernel, device drivers, storage mechanisms, power management, communications/radio drivers, an ...
ch04_THREADS
... maintain the appropriate number of kernel threads allocated to the application Scheduler activations provide upcalls - a communication ...
... maintain the appropriate number of kernel threads allocated to the application Scheduler activations provide upcalls - a communication ...
Introduction
... User types: ‘grep some_word file_name’ Shell parses the command, inserts the strings grep, some_word, file_name into argv and their number to argc Next, the shell uses fork() to create a process (same user ID) Now, it takes the executable name grep and the arguments, all from argv, and uses ...
... User types: ‘grep some_word file_name’ Shell parses the command, inserts the strings grep, some_word, file_name into argv and their number to argc Next, the shell uses fork() to create a process (same user ID) Now, it takes the executable name grep and the arguments, all from argv, and uses ...
Document
... Suspicion Mechanism • Distinguish multiple suspicions of a process – Per-process incarnation number – Inc # for pi can be incremented only by pi • e.g., when it receives a (Suspect, pi) message ...
... Suspicion Mechanism • Distinguish multiple suspicions of a process – Per-process incarnation number – Inc # for pi can be incremented only by pi • e.g., when it receives a (Suspect, pi) message ...
2. Operating Systems
... u Languages defined to replace assembly language for systems programming allow system calls to be made directly (e.g., C, C++) Three general methods are used to pass parameters between a running program and the operating system. u Pass parameters in registers. u Store the parameters in a table in me ...
... u Languages defined to replace assembly language for systems programming allow system calls to be made directly (e.g., C, C++) Three general methods are used to pass parameters between a running program and the operating system. u Pass parameters in registers. u Store the parameters in a table in me ...
ITFN 2601 Introduction to Operating Systems
... exhibited by user-level threads, because the kernel directly schedules each applications threads onto physical processors Performance has been typical an order of magnitude worse than the best-case performance of user-level threads Employ user-level threads, which have good performance and correct ...
... exhibited by user-level threads, because the kernel directly schedules each applications threads onto physical processors Performance has been typical an order of magnitude worse than the best-case performance of user-level threads Employ user-level threads, which have good performance and correct ...
Sloppy hashing and self-organizing clusters Michael J. Freedman and David Mazi`eres
... The DSHT abstraction is specifically suited to locating replicated resources. DSHTs sacrifice the consistency of DHTs to support both frequent fetches and frequent stores of the same hash table key. The fundamental observation is that a node doesn’t need to know every replicated location of a resour ...
... The DSHT abstraction is specifically suited to locating replicated resources. DSHTs sacrifice the consistency of DHTs to support both frequent fetches and frequent stores of the same hash table key. The fundamental observation is that a node doesn’t need to know every replicated location of a resour ...
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.