Appendix A

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Technology and Terms

AC

Alternating current.

ACNT

A term commonly used to describe the IA32_APERF MSR used to calculate average frequency over a user-defined time window.

ACPI

The Advanced Configuration and Power Interface is used by BIOS to expose platform power management capabilities.

APIC

Advanced Programmable Interrupt Controller.

AR

The application ratio is used to describe the CPU logic switching rate of a workload.

ASHRAE

American Society of Heating, Refrigerating, and Air-Conditioning Engineers.

ASPM

Active State Power Management is a feature used to manage the power of PCIe links.

Avoton

Codename ...

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