14LEVERAGING SHARED MEMORY IN THE MULTICORE ERA
The world is changed.
I feel it in the silica.
I feel it in the transistor.
I see it in the core.
–With apologies to Galadriel
Lord of the Rings: Fellowship of the Ring
Until now, our discussion of architecture has focused on a purely single-CPU world. But the world has changed. Today’s CPUs have multiple cores, or compute units. In this chapter, we discuss multicore architectures, and how to leverage them to speed up the execution of programs.
Note CPUS, PROCESSORS, AND CORES
In many instances in this chapter, the terms processor and CPU are used interchangeably. At a fundamental level, a processor ...
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