第3章 问题描述与并行算法设计.ppt

Introduce the concept and importance of design in multithreaded applications. Multithreaded programming uses threads to concurrently execute multiple operations. It focuses on design, development, and deployment of threads within an application and the coordination between the threads and their respective operations. The best time for threading while developing an application is during the design phase. In this phase, you can accommodate all data and code restructuring related to threading. This helps reduce the effort in the overall development while minimizing any redesign. State the various design concepts. Clarify their queries (if any) related to these objectives. Describe and define the idea of threading for functionality. To simplify code, you can design it to assign different threads for functions such as a thread each for input, the graphical user interface (GUI), computation, and output. Threading for functionality is the easiest method because the chances of function overlapping are rare. This makes it easier to control execution of the concurrent functions within an application. Threading is easier than switching functions within a serial code. By assigning different threads to different functions, all the functions will be independent of each other. However, there can still be dependencies between functions even if there is no direct interference between computations. Clarify their queries (if any) related to this slide. Present an example that explains the concept of threading for functionality. Consider a situation where you need to build a house. To complete the job faster, you require several people, each doing smaller and specialized tasks. You may require a bricklayer to build the walls, a carpenter to make the floors, doors, and windows, a roofer to build the roof, a plumber to do the water fittings, and a painter to paint the house. All these people will perform their dedicated task. Questions for Discussion: What kinds of depen