Principles of Operating System
... an instance of a running program the entity that can be assigned to, and executed on, a processor a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources ...
... an instance of a running program the entity that can be assigned to, and executed on, a processor a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources ...
Chapter 13: I/O Systems I/O Hardware
... ✦ Determine device holding file ✦ Translate name to device representation ✦ Physically read data from disk into buffer ✦ Make data available to requesting process ✦ Return control to process ...
... ✦ Determine device holding file ✦ Translate name to device representation ✦ Physically read data from disk into buffer ✦ Make data available to requesting process ✦ Return control to process ...
chapter1
... 4.1 About Swarm Intelligence 4.1.1 Swarms and Emergence Swarm Intelligence (SI) [4] is an artificial intelligence technique based around on the study of collective behavior in decentralized, self-organized systems. The expression "swarm intelligence" was introduced by Beni & Wang in 1989, in the con ...
... 4.1 About Swarm Intelligence 4.1.1 Swarms and Emergence Swarm Intelligence (SI) [4] is an artificial intelligence technique based around on the study of collective behavior in decentralized, self-organized systems. The expression "swarm intelligence" was introduced by Beni & Wang in 1989, in the con ...
PWave: A Multi-source Multi-sink Anycast Routing
... only support single-sink configuration (i.e., unicast routing) with no direct and easy extension to support multi-source, multi-sink anycast routing. In this paper we propose a novel framework – referred to as PWave to support multisource, multi-sink anycast routing that is inherent in WSNs. Inspir ...
... only support single-sink configuration (i.e., unicast routing) with no direct and easy extension to support multi-source, multi-sink anycast routing. In this paper we propose a novel framework – referred to as PWave to support multisource, multi-sink anycast routing that is inherent in WSNs. Inspir ...
A Distributed Reputation Approach to Cooperative Internet Routing Protection
... between two nodes if one AS has an offline trust relationship with another AS. As such, nodes must swap authentication information through some form of out-ofband communication to establish the link. Authentication can come in many forms depending on the specific implementation of the protocol. For ...
... between two nodes if one AS has an offline trust relationship with another AS. As such, nodes must swap authentication information through some form of out-ofband communication to establish the link. Authentication can come in many forms depending on the specific implementation of the protocol. For ...
ch2
... System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for each I/O device indicating its type, address, and state ...
... System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for each I/O device indicating its type, address, and state ...
Questions 1 Question 8.1–1: (Solution, p 3) Name at least two
... Solution 10.1–1: (Question, p 2) Threads are individual execution sequences occurring within the same process. The operating system allocates resources (such as memory and file descriptors) to a process as a whole, and individual threads within that process share these resources. Thus, a process is ...
... Solution 10.1–1: (Question, p 2) Threads are individual execution sequences occurring within the same process. The operating system allocates resources (such as memory and file descriptors) to a process as a whole, and individual threads within that process share these resources. Thus, a process is ...
Operating Systems
... use – Prompt for Permission • notifies end user when patch is available • user decides whether or not to download it – Manual • primarily used for service packs ITE PC v4.0 Chapter 1 ...
... use – Prompt for Permission • notifies end user when patch is available • user decides whether or not to download it – Manual • primarily used for service packs ITE PC v4.0 Chapter 1 ...
Week_6
... Trick 5: Local search • Problem: When trying to forward a message on path “s-a-u-c-t ” node u recognizes that node c is not a neighbor anymore. • Idea: Instead of not delivering the message and sending a NAK to s, node u could try to search for t itself; maybe even by flooding. • Some algorithms ho ...
... Trick 5: Local search • Problem: When trying to forward a message on path “s-a-u-c-t ” node u recognizes that node c is not a neighbor anymore. • Idea: Instead of not delivering the message and sending a NAK to s, node u could try to search for t itself; maybe even by flooding. • Some algorithms ho ...
Operating Systems
... use – Prompt for Permission • notifies end user when patch is available • user decides whether or not to download it – Manual • primarily used for service packs ITE PC v4.0 Chapter 1 ...
... use – Prompt for Permission • notifies end user when patch is available • user decides whether or not to download it – Manual • primarily used for service packs ITE PC v4.0 Chapter 1 ...
Design Challenges of Scalable Operating Systems for Many
... as the number of cores increased, fos showed better load scalability than Linux [21]. In summary, even though some new overhead is introduced, this approach does seem promising. Corey [8] takes a less drastic approach to reducing the number of required locks. Here, applications have to explicitly sp ...
... as the number of cores increased, fos showed better load scalability than Linux [21]. In summary, even though some new overhead is introduced, this approach does seem promising. Corey [8] takes a less drastic approach to reducing the number of required locks. Here, applications have to explicitly sp ...
Chapter 15
... details of the physical transmission of a bit stream. Data-link layer – handles the frames, or fixed-length parts of packets, including any error detection and recovery that occurred in the physical layer. Network layer – provides connections and routes packets in the communication network, incl ...
... details of the physical transmission of a bit stream. Data-link layer – handles the frames, or fixed-length parts of packets, including any error detection and recovery that occurred in the physical layer. Network layer – provides connections and routes packets in the communication network, incl ...
Ubiquitous Computing
... data are downloaded from servers and exchanged with peers across a network and uses intelligent agents to manage virtual ...
... data are downloaded from servers and exchanged with peers across a network and uses intelligent agents to manage virtual ...
Module 15: Network Structures A Distributed System
... details of the physical transmission of a bit stream. ■ Data-link layer – handles the frames, or fixed-length parts of packets, including any error detection and recovery that occurred in the physical layer. ■ Network layer – provides connections and routes packets in the communication network, incl ...
... details of the physical transmission of a bit stream. ■ Data-link layer – handles the frames, or fixed-length parts of packets, including any error detection and recovery that occurred in the physical layer. ■ Network layer – provides connections and routes packets in the communication network, incl ...
GX3512131216
... challenging domain to work within. Braking systems take a short while to apply, and reaction times must be fast for driving, where fractions of a second can be the deciding factor between a collision and a near-miss. At the same time, the braking system is not deployed mistakenly (due to a false pos ...
... challenging domain to work within. Braking systems take a short while to apply, and reaction times must be fast for driving, where fractions of a second can be the deciding factor between a collision and a near-miss. At the same time, the braking system is not deployed mistakenly (due to a false pos ...
Chapter 07.ppt
... • Implementation of Distributed Systems • File Handling – Distributed File System (DFS) is software used – Location independence means any application program can access data, no matter where it resides – Different architectures and operating systems must allow access to the data – Must overcome con ...
... • Implementation of Distributed Systems • File Handling – Distributed File System (DFS) is software used – Location independence means any application program can access data, no matter where it resides – Different architectures and operating systems must allow access to the data – Must overcome con ...
Chapter 2
... The RAM address space is shared; No memory protection from each other The stacks of each thread are intended to be in separate RAM, but if one thread has a problem (e.g., with pointers or array addressing), it could write over the stack of another thread ...
... The RAM address space is shared; No memory protection from each other The stacks of each thread are intended to be in separate RAM, but if one thread has a problem (e.g., with pointers or array addressing), it could write over the stack of another thread ...
History of Unix OS - Seneca
... The Unix OS was developed (based on Multics & CTSS operating systems) by Ken Thompson at the AT&T Bell Laboratories in 1969. He wanted to create an multi-user operating system to run “space wars” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one ...
... The Unix OS was developed (based on Multics & CTSS operating systems) by Ken Thompson at the AT&T Bell Laboratories in 1969. He wanted to create an multi-user operating system to run “space wars” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one ...
File - ashish b. khare
... operating system that utilizes virtual memory, including Microsoft Windows, Unix-like systems (including Mac OS X, Linux, *BSD, Solaris, AIX, and HP-UX), and z/OS. Microsoft uses the term hard fault in more recent versions of the Resource Monitor (e.g., Windows Vista) to mean 'page fault'. 3.1 Page ...
... operating system that utilizes virtual memory, including Microsoft Windows, Unix-like systems (including Mac OS X, Linux, *BSD, Solaris, AIX, and HP-UX), and z/OS. Microsoft uses the term hard fault in more recent versions of the Resource Monitor (e.g., Windows Vista) to mean 'page fault'. 3.1 Page ...
Ceng 334 - Operating Systems
... record) is read in and executed • This sector loads the boot program • Boot reads root directory, loads kernel and starts its execution • Kernel reads the rest of the operating system (main C-code section) • C code does some initialization, allocates system data structures, loads device drivers and ...
... record) is read in and executed • This sector loads the boot program • Boot reads root directory, loads kernel and starts its execution • Kernel reads the rest of the operating system (main C-code section) • C code does some initialization, allocates system data structures, loads device drivers and ...
Chapter 13 I/O Hardware
... Determine device holding file Translate name to device representation Physically read data from disk into buffer Make data available to requesting process Return control to process ...
... Determine device holding file Translate name to device representation Physically read data from disk into buffer Make data available to requesting process Return control to process ...
Jordan University of Science and Technology
... Peak-load performance: - hard real-time system: the peak-load scenario must be well-defined, guaranteed to meet the specified deadlines in all situations.- soft-real time system, the average performance is important, and a degraded operation in a rarely occurring peak load case is tolerated Control ...
... Peak-load performance: - hard real-time system: the peak-load scenario must be well-defined, guaranteed to meet the specified deadlines in all situations.- soft-real time system, the average performance is important, and a degraded operation in a rarely occurring peak load case is tolerated Control ...
Writing Web Pages
... – prevents users/programs adversely affecting the hardware or other users – the system should never crash OSes: 1. Intro ...
... – prevents users/programs adversely affecting the hardware or other users – the system should never crash OSes: 1. Intro ...
The Operating System
... For usage statistics (later used for tuning and development of mechanisms) Protection and security - concurrent processes should not interfere with each other ...
... For usage statistics (later used for tuning and development of mechanisms) Protection and security - concurrent processes should not interfere with each other ...
Document
... P2P file sharing, without central node (items are files) Large scale, distributed or grid computation (items are computational tasks) ...
... P2P file sharing, without central node (items are files) Large scale, distributed or grid computation (items are computational tasks) ...
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.