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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.
Draw a finite-state machine for tennis scoring. The rules of tennis are as follows. To win, you need at least four points and you must have at least two points more than your opponent.
1-Relationnal database design: (Relationnal database design )Given the following table that keeps track of student clubs memberships: StuentClub( S
Mike buys some electronic goods from a wholesaler for $650 and spends $100 on its transportation's, etc. If he sells these electronic goods for $900; find the profit or loss made by him and express it as percent.
Write an application where the user to specifies the polygonal Base of a prism using the mouse. it then creates the vertex, normal, and face lists for the prism, and displays it.
Create a database using professional principles and standards. Use a relational database software application to develop a database implementing the logical design into a physical design.
1.Rearrange the Program. 2.Ask the user to enter employee's name, arrival time and departure time.
Implement a program using function for a defined task. Initial data is read from a file and added from keyboard. Program has to output resulting and initial data.
From the first e-Activity, discuss the uses and advantages for an enterprise utilizing an SMTP server.
The final document shall be delivered in standard .doc or .docx format. The network diagram shall be imbedded in the document. The network diagram can be produced using such tools as Visio from Microsoft Corporation, or Network Notepad (freely avai..
A machine has a 32 bit virtual address space and a 16kb page size. It has 1gb of physical memory. How many pages does a process have? How many bytes are needed for a page table, assuming 4 control bits and that disk addresses are stored elsewhere?
Consider two machines, a classical von Neumann architecture as well as a more modern machine with two buses.
Discuss the basic forms of conducting international business, and basic international business strategies.
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