Read e-book online Code Optimization: Effective Memory Usage PDF

By Kris Kaspersky

A consultant to optimizing courses at the computing device and Unix structures, this e-book covers the expediency of optimization and the the right way to elevate the rate of courses through optimization. mentioned are commonplace errors made by way of programmers that decrease the functionality of the approach in addition to simply applied ideas. certain descriptions of the units and mechanism of interplay of the pc parts, powerful methods of programming, and a strategy for optimizing courses, are supplied. Programmers also will successfully enforce programming tools in a high-level language that's frequently performed in assembler with specific consciousness given to the RAM subsystem. The operating rules of the RAM and how during which it truly is coupled with the processor in addition to an outline of programming tools that enables programmers to overclock the reminiscence to arrive greatest functionality are incorporated.

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Then, locate the toolbar button with the icon that depicts the Coach and click on it. The Coach will request information about the file used to compile the program. You can choose between the following options: make-file, pre-processor file, and, as in any professional program, manual input. Because you didn't set specific compiler options and have no make-file, choose the Manual Entry option and click OK. Ignore the "No source options were specified" message displayed on the screen, then click OK again.

The code fragments that took the longest time to execute). In this example, the profiler has detected 187 hotspots (as shown in the right pane of the profiler window). Pay special attention to the two peaks located to the right of the center of the screen. These two peaks aren't just "hot;" they are "white hot," because they consume the majority of the program's performance. It is a must to begin with the optimization of these points. Move the cursor to the highest peak. VTune will immediately tell you that it belongs to the output function.

Note Years ago, when computers could run without operating systems and no one had even heard about multitasking, programs had to be loaded manually. After it was loaded, each program monopolized the computer's resources, including the main memory. Chapter 2: RAM Subsystem 53 54 Chapter 2: RAM Subsystem With the arrival of multitasking operating systems came the problem of how to share resources (especially the main memory) between several applications. The protection of the "property" of a specific application from the influence of other applications was no less important.

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