POWERNOW(4) | Device Drivers Manual (x86) | POWERNOW(4) |
powernow
— AMD
PowerNow! and Cool'n'Quiet
powernow0 at cpu0
The powernow
driver supports AMD
“PowerNow!” and “Cool'n'Quiet” CPU frequency
scaling technologies. The following
sysctl(8) variables are
available with powernow
:
machdep.cpu.frequency.target
machdep.cpu.frequency.current
machdep.cpu.frequency.available
Note, however, that these variables are not guaranteed to exist in the future versions of NetBSD.
The powernow
driver is considered a legacy
interface to be used only with relatively old systems. The driver supports
only AMD processor families K7 (for instance, Duron, Athlon, and some
Semprons) and K8 (namely, the early 64-bit family, including Athlon 64,
Opteron, and Turion).
September 7, 2020 | NetBSD 10.99 |