Chapter 4. Using OpenACC for Your First Program
John Urbanic, Pittsburgh Supercomputing Center
In this chapter, you’ll parallelize real code. You will start with code that does something useful. Then you’ll consider how you might use OpenACC to speed it up. You will see that reducing data movement is key to achieving significant speedup, and that OpenACC gives you the tools to do so. By the end of the chapter you will be able to call yourself an OpenACC programmer—a fledgling one, perhaps, but on your way. Let’s jump right into it.
4.1 Case Study
You are reading a book about OpenACC programming, so it’s a safe bet the authors are fans of this approach to parallel programming. Although that’s a perfectly sensible thing, it has its dangers. It ...
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