| ACPICPU(4) | Device Drivers Manual | ACPICPU(4) |
acpicpu —
acpicpu* at acpi?
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.
acpicpu driver first appeared in
OpenBSD 3.9.
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 |