Document
... 23. Write about OS generation 24. Explain the various types of computer systems. 25. Explain interrupts in detail. 26. Explain Direct Memory Access. 27. Discuss Memory Hierarchy. 28. What are the system components of an operating system and explain them? 29. List five services provided by an operati ...
... 23. Write about OS generation 24. Explain the various types of computer systems. 25. Explain interrupts in detail. 26. Explain Direct Memory Access. 27. Discuss Memory Hierarchy. 28. What are the system components of an operating system and explain them? 29. List five services provided by an operati ...
I/O Speculation for the Microsecond Era
... In contrast to the blocking strategy, where the application cannot do useful work while the kernel is polling for the device to complete, speculation allows the application to perform useful work while the I/O is being dispatched. Compared to the yielding strategy, speculation avoids the overhead in ...
... In contrast to the blocking strategy, where the application cannot do useful work while the kernel is polling for the device to complete, speculation allows the application to perform useful work while the I/O is being dispatched. Compared to the yielding strategy, speculation avoids the overhead in ...
The Duality of Memory and Communication in the Implementation of a
... In late 1984, we began implementation of an operating system called Mach. Our goals for Mach were: • an object oriented interface with a small number of basic system objects, • support for both distributed computing and multiprocessing, • portability to a wide range of multiprocessor and uniprocesso ...
... In late 1984, we began implementation of an operating system called Mach. Our goals for Mach were: • an object oriented interface with a small number of basic system objects, • support for both distributed computing and multiprocessing, • portability to a wide range of multiprocessor and uniprocesso ...
IOSR Journal of Computer Engineering (IOSR-JCE)
... priorities and assurances that they require to implement QoS. Therefore, on the other extreme we have tasks and applications that do not need any guarantees. On the other extreme, we have tasks and applications that need complete assurances that may not be agreed or compromised. In between those two ...
... priorities and assurances that they require to implement QoS. Therefore, on the other extreme we have tasks and applications that do not need any guarantees. On the other extreme, we have tasks and applications that need complete assurances that may not be agreed or compromised. In between those two ...
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... improve an underlay network’s resilience and performance [3,14,18]. Our work complements and takes advantage of such ongoing research effort of performing QoS-aware routing in overlay networks such as RON[3]. OverQoS[19], an overlaybased architecture can provide a variety of QoS-enhancing innetwork ...
... improve an underlay network’s resilience and performance [3,14,18]. Our work complements and takes advantage of such ongoing research effort of performing QoS-aware routing in overlay networks such as RON[3]. OverQoS[19], an overlaybased architecture can provide a variety of QoS-enhancing innetwork ...
Slides for chapter 12
... some of the sectors were written with the new data, and the sector being written during the failure may have been corrupted 3. Total failure - The failure occurred before the disk write started, so the previous data values on the disk remain intact ■ If failure occurs during block write, recovery pr ...
... some of the sectors were written with the new data, and the sector being written during the failure may have been corrupted 3. Total failure - The failure occurred before the disk write started, so the previous data values on the disk remain intact ■ If failure occurs during block write, recovery pr ...
Chapter 7 Lecture Presentation
... Routing is a major component of the network layer and is concerned with the problem of determining feasible path (or routes) for packets to follow from each source to each destination. ...
... Routing is a major component of the network layer and is concerned with the problem of determining feasible path (or routes) for packets to follow from each source to each destination. ...
Inglés
... In recent years, the usage of wireless and mobile networks has increased considerably (García et al., 2004). In this context, the mobile Ad hoc networks (MANET) are an alternative for applications when using other kind of networks is not viable. A MANET is a collection of mobile and wireless nodes w ...
... In recent years, the usage of wireless and mobile networks has increased considerably (García et al., 2004). In this context, the mobile Ad hoc networks (MANET) are an alternative for applications when using other kind of networks is not viable. A MANET is a collection of mobile and wireless nodes w ...
Processes - EECG Toronto
... • This lecture starts a class segment that covers processes, threads, and synchronization • These topics are perhaps the most important in this class • You can rest assured that they will be covered in the exams ...
... • This lecture starts a class segment that covers processes, threads, and synchronization • These topics are perhaps the most important in this class • You can rest assured that they will be covered in the exams ...
Cooperation in Wireless Communication Networks
... and DF with a repetition coding scheme, the sample buffer can store a linear combination of the previously received symbols regardless of how many copies are received. However, when new coded symbols are received, as in CC, the storage requirement of the sample buffer increases linearly with the num ...
... and DF with a repetition coding scheme, the sample buffer can store a linear combination of the previously received symbols regardless of how many copies are received. However, when new coded symbols are received, as in CC, the storage requirement of the sample buffer increases linearly with the num ...
Dept. of Computer Science Engineering, School of Engineering
... 4. Justify the following statements. OS can be viewed as a Resource Allocator. OS is a Control Program 5. Some CPUs provide for more than two modes of operation. What are two possible uses of these multiple modes? Explain. 6. a) What are OS objectives? Explain them detail. b) Explain basic structure ...
... 4. Justify the following statements. OS can be viewed as a Resource Allocator. OS is a Control Program 5. Some CPUs provide for more than two modes of operation. What are two possible uses of these multiple modes? Explain. 6. a) What are OS objectives? Explain them detail. b) Explain basic structure ...
Martin Herzog, Technical University Berlin
... a single link or node failure in a rather inefficient manner by wrapping and steering incoming traffic away from the failure on the opposite fiber ring. For instance, it was shown in [3] that in the event of a failure, the loss of traffic in a 63-node RPR network may be as high as 94 percent due to ...
... a single link or node failure in a rather inefficient manner by wrapping and steering incoming traffic away from the failure on the opposite fiber ring. For instance, it was shown in [3] that in the event of a failure, the loss of traffic in a 63-node RPR network may be as high as 94 percent due to ...
Virtualization in Software Engineering
... Operating System Virtualization A layer in the operating system to run servers in a virtualized environment Each environment is a “container” ...
... Operating System Virtualization A layer in the operating system to run servers in a virtualized environment Each environment is a “container” ...
Lecture 3
... Application Performance Comparison Application performance is nearly identical for TinyOS, SOS and Mate ...
... Application Performance Comparison Application performance is nearly identical for TinyOS, SOS and Mate ...
Proceedings of the General Track: 2003 USENIX Annual Technical Conference
... For example, VMware Workstation [Sugerman01] and Connectix VirtualPC [Con01] use the host operating system to access some virtual I/O devices. A host operating system makes a very convenient platform upon which to build a VMM. Host operating system provide a set of abstractions that map closely to e ...
... For example, VMware Workstation [Sugerman01] and Connectix VirtualPC [Con01] use the host operating system to access some virtual I/O devices. A host operating system makes a very convenient platform upon which to build a VMM. Host operating system provide a set of abstractions that map closely to e ...
Operating Systems - Computer Society Of India
... mobile sets so near to us that had changed everyday life in this 21st Century. Operating systems are required in the department of defense in their submarines operating outside the territory of the home government, as well as in the department of atomic energy in their nuclear projects secured in a ...
... mobile sets so near to us that had changed everyday life in this 21st Century. Operating systems are required in the department of defense in their submarines operating outside the territory of the home government, as well as in the department of atomic energy in their nuclear projects secured in a ...
JiST: EMBEDDING SIMULATION TIME INTO A VIRTUAL MACHINE
... create a simulation system that can execute discrete event simulations efficiently, yet achieve this transparently within a standard language and its runtime, where: [definitions deleted] These three attributes – the last one in particular – highlight an important distinction between JiST and previo ...
... create a simulation system that can execute discrete event simulations efficiently, yet achieve this transparently within a standard language and its runtime, where: [definitions deleted] These three attributes – the last one in particular – highlight an important distinction between JiST and previo ...
Operating System Support for Virtual Machines
... For example, VMware Workstation [Sugerman01] and Connectix VirtualPC [Con01] use the host operating system to access some virtual I/O devices. A host operating system makes a very convenient platform upon which to build a VMM. Host operating system provide a set of abstractions that map closely to e ...
... For example, VMware Workstation [Sugerman01] and Connectix VirtualPC [Con01] use the host operating system to access some virtual I/O devices. A host operating system makes a very convenient platform upon which to build a VMM. Host operating system provide a set of abstractions that map closely to e ...
Control and Configuration Software for a
... III. S OFTWARE C OMPONENTS NCHARGE is the software component that controls reprogrammable hardware on a switch. Figure 2 shows the role of NCHARGE in conjunction with multiple FPX devices within a switch. The software provides connectivity between each FPX and multiple remote software processes via ...
... III. S OFTWARE C OMPONENTS NCHARGE is the software component that controls reprogrammable hardware on a switch. Figure 2 shows the role of NCHARGE in conjunction with multiple FPX devices within a switch. The software provides connectivity between each FPX and multiple remote software processes via ...
Operating System Support for Virtual Machines
... For example, VMware Workstation [Sugerman01] and Connectix VirtualPC [Con01] use the host operating system to access some virtual I/O devices. A host operating system makes a very convenient platform upon which to build a VMM. Host operating system provide a set of abstractions that map closely to e ...
... For example, VMware Workstation [Sugerman01] and Connectix VirtualPC [Con01] use the host operating system to access some virtual I/O devices. A host operating system makes a very convenient platform upon which to build a VMM. Host operating system provide a set of abstractions that map closely to e ...
Ad hoc network routing - Networking, Sensing
... Many routing protocols for ad hoc networks have been proposed. Generally, they can be categorized into three types: proactive (label switch), reactive (on demand), and intra-zone proactive with inter-zone reactive ...
... Many routing protocols for ad hoc networks have been proposed. Generally, they can be categorized into three types: proactive (label switch), reactive (on demand), and intra-zone proactive with inter-zone reactive ...
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.