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详细说明： 很不错经典书籍,逐步了解COM的强大. Component Software For as long as personal computers have existed, the industry has provided increasingly powerful hardware for CPU-hungry software. Companies such as Intel have upgraded their processors from 8 to 16 to 32 bits and have increased their clock speed from 4.77 to over 550 megahertz (MHz). Under development are 64-bit processors that will run at still higher clock speeds. Yet the cost of developing a new processor is so prohibitive that only the largest corporations can afford the expense of upgr ading. And we might someday run into the law of diminishing returns, making the expense of development outweigh the possible improvements. Many other ways have been suggested for improving overall processing speed. Foremost has been the concept of parallel processing. Parallel processing holds that in an ideal environment, if one CPU can do x amount of work in a certain amount of time, 10 CPUs can do 10x work in the same time. Parallel processing can be implemented in two major ways: symmetric multiprocessing (SMP) and distributed computing. With SMP, several (or several hundred) CPUs are placed inside a single computer. The host operating system must support multithreading so that different threads can be scheduled to run on different CPUs concurrently. Implementing SMP requires special software support. Microsoft Windows NT, for example, was one of the first PC operating systems capable of supporting SMP. Today, Microsoft Windows 2000 can quite flexibly support up to 16 processors. ...展开收缩
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