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xv
Preface
This book shows how, by harnessing the power of your computer’s graphics
process unit (GPU), you can write high-performance software for a wide range
of applications. Although originally designed to render computer graphics on
a monitor (and still used for this purpose), GPUs are increasingly being called
upon for equally demanding programs in science, engineering, and nance,
among other domains. We refer collectively to GPU programs that address
problems in nongraphics domains as general-purpose. Happily, although you
need to have some experience working in C or C++ to benet from this book,
you need not have any knowledge of computer graphics. None whatsoever! GPU
programming simply offers you an opportunity to build—and to build mightily—
on your existing programming skills.
To program NVIDIA GPUs to perform general-purpose computing tasks, you
will want to know what CUDA is. NVIDIA GPUs are built on what’s known as
the CUDA Architecture. You can think of the CUDA Architecture as the scheme
by which NVIDIA has built GPUs that can perform both traditional graphics-
rendering tasks and general-purpose tasks. To program CUDA GPUs, we will
be using a language known as CUDA C. As you will see very early in this book,
CUDA C is essentially C with a handful of extensions to allow programming of
massively parallel machines like NVIDIA GPUs.
We’ve geared CUDA by Example toward experienced C or C++ programmers
who have enough familiarity with C such that they are comfortable reading and
writing code in C. This book builds on your experience with C and intends to serve
as an example-driven, “quick-start” guide to using NVIDIA’s CUDA C program-
ming language. By no means do you need to have done large-scale software
architecture, to have written a C compiler or an operating system kernel, or to
know all the ins and outs of the ANSI C standards. However, we do not spend
time reviewing C syntax or common C library routines such as malloc() or
memcpy(), so we will assume that you are already reasonably familiar with these
topics.
From the Library of Daisy Alford Smith
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