| ACPICPU(4) | Device Drivers Manual | ACPICPU(4) |
acpicpu — ACPI
processor power and performance state
acpicpu* at acpi?
The acpicpu driver provides support for
extracting processor power and performance levels from ACPI tables. This
information is used to enter deeper CPU power states when idle, and can be
used to throttle processor speed to reduce power usage and extend battery
life through the hw.setperf
sysctl(2) mechanism.
The acpicpu driver first appeared in
OpenBSD 3.9.
The acpicpu driver was written by
Marco Peereboom
<marco@openbsd.org>.
CPU power state (C-state) support was added by Philip
Guenther
<guenther@openbsd.org>.
| January 12, 2018 | OpenBSD-current |