Method and Logic for Maintaining Performance Counters with Dynamic Frequencies

Abstract

A processor includes a front end including circuitry to decode an instruction from an instruction stream and a core including circuitry to process the instruction. The core includes an execution pipeline, a dynamic core frequency logic unit, and a counter compensation logic unit. The execution pipeline includes circuitry to execute the instruction. The dynamic core frequency logic unit includes circuitry to squash a clock of the core to reduce a core frequency. The clock may not be visible to software. The counter compensation logic unit includes circuitry to adjust a performance counter increment associated with a performance counter based on at least the dynamic core frequency logic unit circuitry to squash a clock of the core to reduce a core frequency.

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