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Equation 9 · Locality Is the Whole Game: The Memory Hierarchy and What a Kernel Does Not Read

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I∗I^{*}

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I∗I^{*}

Symbol I^*

I∗I^* is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

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superscript

superscript

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Everything else in this article follows from one observation about that ridge point: because Pmax⁡P_{\max} has been growing at roughly twice the rate of B [ 4 ] , I∗I^{*} has been climbing steadily. A kernel whose intensity was comfortably compute-bound on one generation can be memory-bound on the next without a single line of it changing. Hardware progress moves operations across the boundary in only one direction.

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