Processors

Evaluation of the Intel Core I7 Turbo Boost Feature

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Executive Summary

The Intel Core i7 processor code named Nehalem has a novel feature called Turbo Boost which dynamically varies the frequencies of the processor's cores. The frequency of a core is determined by core temperature, the number of active cores, the estimated power and the estimated current consumption. The authors perform an extensive analysis of the Turbo Boost technology to characterize its behavior in varying workload conditions. In particular, they analyze how the activation of Turbo Boost is affected by inherent properties of applications (i.e., their rate of memory accesses) and by the overall load imposed on the processor.

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