---
name: "aplcpu"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/aplcpu"
---

# aplcpu(4)

Apple CPU power states

## NAME

**aplcpu** – Apple CPU power states

## SYNOPSIS

**aplcpu\* at fdt?**

## DESCRIPTION

The **aplcpu** driver provides support for managing the CPU power states on Apple SoCs. These power states can be set to reduce power usage and extend battery life through the *hw.setperf* [sysctl(2)](/sysctl/2.md) mechanism.

## SEE ALSO

[sysctl(2)](/sysctl/2.md), [intro(4)](/intro/4.md), [apmd(8)](/apmd/8.md), [sysctl(8)](/sysctl/8.md)

## HISTORY

The **aplcpu** driver first appeared in OpenBSD 7.1.

## AUTHORS

The **aplcpu** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.