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B.1. About instruction cycle timing

This chapter provides information to estimate how much execution time particular code sequences require. The complexity of the Cortex-A9 processor makes it impossible to calculate precise timing information manually. The timing of an instruction is often affected by other concurrent instructions, memory system activity, and additional events outside the instruction flow. Detailed descriptions of all possible instruction interactions, and all possible events taking place in the processor, is beyond the scope of this document.

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