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Meh...<p>Wikipedia has it better and more comprehensive - <a href="https://en.wikipedia.org/wiki/CPU_cache" rel="nofollow">https://en.wikipedia.org/wiki/CPU_cache</a><p>For usage of caches from a OS, particularly in the context of multicores/multiprocessors see Curt Schimmel's classic <i>Unix Systems for Modern Architectures: Symmetric Multiprocessing and Caching for Kernel Programmers.</i>