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Consider the tree-based termination detection scheme in Section 11.4.4. In this algorithm, the weights may become very small and may eventually become zero due to the finite precision of computers. In such cases, termination is never signaled. The algorithm can be modified by manipulating the reciprocal of the weight instead of the weight itself. Write the modified termination algorithm and show that it is capable of detecting termination correctly. Q11.6
[DM93] Consider a termination detection algorithm in which a spanning tree of minimum diameter is mapped onto the architecture of the given parallel computer. The center of such a tree is a vertex with the minimum distance to the vertex farthest from it. The center of a spanning tree is considered to be its root. While executing parallel search, a processor can be either idle or busy. The termination detection algorithm requires all work transfers in the system to be acknowledged by an ack message. A processor is busy if it has work, or if it has sent work to another processor and the corresponding ack message has not been received; otherwise the processor is idle. Processors at the leaves of the spanning tree send stop messages to their parent when they become idle. Processors at intermediate levels in the tree pass the stop message on to their parents when they have received stop messages from all their children and they themselves become idle. When the root processor receives stop messages from all its children and becomes idle, termination is signaled. Since it is possible for a processor to receive work after it has sent a stop message to its parent, a processor signals that it has received work by sending a resume message to its parent. The resume message moves up the tree until it meets the previously issued stop message. On meeting the stop message, the resume message nullifies the stop message. An ack message is then sent to the processor that transferred part of its work. Show using examples that this termination detection technique correctly signals termination. Determine the isoefficiency term due to this termination detection scheme for a spanning tree of depth log p.
Discuss the following: 1. What is cyber warfare. 2. What is a network?
Using the Activity Diagram above, produce a system sequence diagram, i.e. only include two swimlanes - one for the actor (PSSM employee) and the other for the entire system as a system class object.
Final Website This Application gives you an opportunity to test what you have learned about accessibility on the web and apply it to your own website. Building on what you have already done, the final website will demonstrate all the web techni..
Evaluate the reason for the limited use of the root or superuser account in Linux
Please review your previous work including that of last week with your Network Security Plan and make revisions and modifications as necessary based on our discussions and research up to this point. This is a plan that would be submitted to your c..
A business company wants to computerize some of the job processes currently preformed manually by its employees. You are hired as an Interface design professional to come up with a user interface.
Should this additional restriction be used in the matching process?
Demonstrate the correct working of your classes by reading in a collection of student records from a file, sort the records, and print them. If a name is "EOF" it will mark the end of the file.
What is the value of the constant c?
Consider two (2) advantages and two (2) disadvantages of allowing employees of an organization, other than systems administrators and security personnel, to create and modify group policy objects in an organization and whether you believe the advanta..
discuss some of the expected trends that will continue or emerge in the coming years
The Course Project's focus is on the use of technology to solve specific business problems. Although the list of technologies that you can choose for your Course Project is vast, the following are some current technical topic suggestions appropriate ..
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