Kontron COMe-bPC2 - Manual (Page 47)

COMe-bPC2 / Features and Interfaces
4.16 Enhanced Intel Dynamic Acceleration Technology
The processor supports Intel Dynamic Acceleration Technology mode. The Intel Dynamic Acceleration Technology feature
allows one core of the processor to operate at a higher frequency point when the other core is inactive and the operating
system requests increased performance. This higher frequency is called the opportunistic frequency and the maximum
rated operating frequency is the ensured frequency. The processor includes a hysteresis mechanism that improves overall
Intel Dynamic Acceleration Technology performance by decreasing unnecessary transitions of the cores in and out of Intel
Dynamic Acceleration Technology mode. Normally, the processor would exit Intel Dynamic Acceleration Technology as
soon as two cores are active. This can become an issue if the idle core is frequently awakened for a short periods (i.e., high
timer tick rates). The hysteresis mechanism allows two cores to be active for a limited time before it transitions out of
Intel Dynamic Acceleration Technology mode.
Intel Dynamic Acceleration Technology mode enabling requires:
» Exposure, via BIOS, of the opportunistic frequency as the highest ACPI P state
» Enhanced Multi-Threaded Thermal Management (EMTTM)
» Intel Dynamic Acceleration Technology mode and EMTTM MSR configuration via BIOS
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