Real-time Operating Systems
... execute again will enter the terminated state. A terminated thread can be deleted from the system ...
... execute again will enter the terminated state. A terminated thread can be deleted from the system ...
ppt
... permanently, the computer system must provide secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: ...
... permanently, the computer system must provide secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: ...
slides - TNC15
... • It was a peer network of communicating equals not a hierarchical network connecting a mainframe master with terminal slaves. • The approach required coordinating distributed shared state at different scopes, which were treated as black boxes. This lead to the concept of layers being adopted from o ...
... • It was a peer network of communicating equals not a hierarchical network connecting a mainframe master with terminal slaves. • The approach required coordinating distributed shared state at different scopes, which were treated as black boxes. This lead to the concept of layers being adopted from o ...
Processes and Threads
... What is a program? A program is a file containing executable code (machine instructions) and data (information manipulated by these instructions) that together describe a computation ...
... What is a program? A program is a file containing executable code (machine instructions) and data (information manipulated by these instructions) that together describe a computation ...
PPT Chapter 02
... larger than the real memory of a computer – Implemented using noncontiguous memory allocation and the MMU • CPU passes the address of data or instruction used in an instruction to MMU – It is called the logical addresses ...
... larger than the real memory of a computer – Implemented using noncontiguous memory allocation and the MMU • CPU passes the address of data or instruction used in an instruction to MMU – It is called the logical addresses ...
Operating Systems 2230 Lecture 8: Complexity of I/O Devices
... Many I/O devices, typically communications/networking devices, report their transfer speeds in bits-per-second (bps). Moreover, communication speeds are given in multiples of 1000bps, not 1024bps, so that transferring one megabyte of data at 1Mbps may take 2.5% longer than you’d think! The diversit ...
... Many I/O devices, typically communications/networking devices, report their transfer speeds in bits-per-second (bps). Moreover, communication speeds are given in multiples of 1000bps, not 1024bps, so that transferring one megabyte of data at 1Mbps may take 2.5% longer than you’d think! The diversit ...
View File - University of Engineering and Technology, Taxila
... Data flows to centralized location. Low per-node rates but up to 100,000 nodes. Data highly correlated in time and space. Nodes can cooperate in transmission, reception, ...
... Data flows to centralized location. Low per-node rates but up to 100,000 nodes. Data highly correlated in time and space. Nodes can cooperate in transmission, reception, ...
Chapter 6: Operating Systems: The Genie in the Computer
... box. It will tell you which operating system and which version of the operating system is required. • Compatibility problems may arise if an operating system is updated. One of two things might happen after updating: 1. The operating system may be compatible with older software so that more users wi ...
... box. It will tell you which operating system and which version of the operating system is required. • Compatibility problems may arise if an operating system is updated. One of two things might happen after updating: 1. The operating system may be compatible with older software so that more users wi ...
Suman Bannerjee, U Wisconsin, “Wireless Virtualization of
... longer in new system – Ruby network delay causes significant variance in data set – Handler must approximate sleep times ...
... longer in new system – Ruby network delay causes significant variance in data set – Handler must approximate sleep times ...
Document
... received considerable attention due to their potential applications in civilian and military environments. For example, in a battlefield, a wireless P2P network may consist of several commanding officers and a group of soldiers. Each officer has a relatively powerful data center, and the soldiers ne ...
... received considerable attention due to their potential applications in civilian and military environments. For example, in a battlefield, a wireless P2P network may consist of several commanding officers and a group of soldiers. Each officer has a relatively powerful data center, and the soldiers ne ...
Dual prediction-based reporting for object tracking sensor networks
... Increase the amount of time nodes spend sleeping Nodes not involved in tracking sleep until woken up Even nodes currently tracking spend as much time as they can sleeping Three components Prediction Wakeup Recovery ...
... Increase the amount of time nodes spend sleeping Nodes not involved in tracking sleep until woken up Even nodes currently tracking spend as much time as they can sleeping Three components Prediction Wakeup Recovery ...
ecs251_w2013_sample_final
... (DHT/Chord) Here is a short description of Chord from Wikipedia: The Chord protocol is one solution for connecting the peers of a P2P network. Chord consistently maps a key onto a node. Both keys and nodes are assigned an m-bit identifier. For nodes, this identifier is a hash of the node's IP addres ...
... (DHT/Chord) Here is a short description of Chord from Wikipedia: The Chord protocol is one solution for connecting the peers of a P2P network. Chord consistently maps a key onto a node. Both keys and nodes are assigned an m-bit identifier. For nodes, this identifier is a hash of the node's IP addres ...
Core System Services
... • A runlevel is a preset operating state on a Unix-like operating system. • A system can be booted into any of several runlevels, each of which is represented by a single digit integer. Each runlevel designates a different system configuration and allows access to a different combination of processe ...
... • A runlevel is a preset operating state on a Unix-like operating system. • A system can be booted into any of several runlevels, each of which is represented by a single digit integer. Each runlevel designates a different system configuration and allows access to a different combination of processe ...
Concurrent Processes
... What Is Parallel Processing? (continued) • Faster instruction processing methods – CPU allocated to each program or job – CPU allocated to each working set or parts of it – Individual instructions subdivided • Each subdivision processed simultaneously • This is also called Concurrent programming ...
... What Is Parallel Processing? (continued) • Faster instruction processing methods – CPU allocated to each program or job – CPU allocated to each working set or parts of it – Individual instructions subdivided • Each subdivision processed simultaneously • This is also called Concurrent programming ...
Corporate network capacity planning - is there a need?
... What are the challenges? • Understanding the network infrastructure • Current state of the network • The cost of poor performance and unavailability • What needs to be measured and why? ...
... What are the challenges? • Understanding the network infrastructure • Current state of the network • The cost of poor performance and unavailability • What needs to be measured and why? ...
What is an Operating System?
... Mode bit provided by hardware Provides ability to distinguish when system is running user code or kernel code Some instructions designated as privileged, only executable in kernel mode ...
... Mode bit provided by hardware Provides ability to distinguish when system is running user code or kernel code Some instructions designated as privileged, only executable in kernel mode ...
128509655X_397007
... the same time and share resources • Required OS to have an intermediate manager – Oversee the access of each operating system to the server’s physical resources ...
... the same time and share resources • Required OS to have an intermediate manager – Oversee the access of each operating system to the server’s physical resources ...
Operating Systems
... Each processor runs an identical copy of the operating system. Many processes can run at once without performance deterioration. Most modern operating systems support SMP ...
... Each processor runs an identical copy of the operating system. Many processes can run at once without performance deterioration. Most modern operating systems support SMP ...
ecs251_w2013_final
... computer scientists specializing in parallel databases and shared-nothing architectures, have been critical of the breadth of problems that MapReduce can be used for. They called its interface too lowlevel and questioned whether it really represents the paradigm shift its proponents have claimed it ...
... computer scientists specializing in parallel databases and shared-nothing architectures, have been critical of the breadth of problems that MapReduce can be used for. They called its interface too lowlevel and questioned whether it really represents the paradigm shift its proponents have claimed it ...
Threads
... Multiple threads w Each with its own registers, in particular PC and SP w Each has its own stack in the address space w Code and data is shared ...
... Multiple threads w Each with its own registers, in particular PC and SP w Each has its own stack in the address space w Code and data is shared ...
Optimal Stochastic Location Updates In Mobile Ad Hoc Networks
... network (MANET) is becoming available for various applications. This location information not only provides one more degree of freedom in designing network protocols, but also is critical for the success of many military and civilian applications. Disadvantages ...
... network (MANET) is becoming available for various applications. This location information not only provides one more degree of freedom in designing network protocols, but also is critical for the success of many military and civilian applications. Disadvantages ...
pptx - Department of Computer Science and Engineering, CUHK
... EDP outperforms baseline consistently in tracedriven simulations, and its performance is close to optimal for practical workloads EDP reduces the file read latency of baseline by 37.41% in the test-bed experiments In heterogeneous network, CEDP outperforms both EDP and baseline EDP lags as t ...
... EDP outperforms baseline consistently in tracedriven simulations, and its performance is close to optimal for practical workloads EDP reduces the file read latency of baseline by 37.41% in the test-bed experiments In heterogeneous network, CEDP outperforms both EDP and baseline EDP lags as t ...
Chapter 6: Operating Systems: The Genie in the Computer
... box. It will tell you which operating system and which version of the operating system is required. • Compatibility problems may arise if an operating system is updated. One of two things might happen after updating: 1. The operating system may be compatible with older software so that more users wi ...
... box. It will tell you which operating system and which version of the operating system is required. • Compatibility problems may arise if an operating system is updated. One of two things might happen after updating: 1. The operating system may be compatible with older software so that more users wi ...
Exploiting System Diversity in Peer-to
... We choose to focus on the convergecast and general purpose multicast paradigms as these ...
... We choose to focus on the convergecast and general purpose multicast paradigms as these ...
Parallel Databases
... • User wants to issue simple SQL, and not be concerned with parallel aspects • DBMS needs structures and facilities to parallelise queries • Good optimiser technology is essential • As database grows, effects (good or bad) of optimiser become increasingly significant ...
... • User wants to issue simple SQL, and not be concerned with parallel aspects • DBMS needs structures and facilities to parallelise queries • Good optimiser technology is essential • As database grows, effects (good or bad) of optimiser become increasingly significant ...
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.