powernow
—
AMD PowerNow! and Cool'n'Quiet
The powernow
driver supports AMD
“PowerNow!” and “Cool'n'Quiet” CPU frequency
scaling technologies. The following
sysctl(8) variables are
available with powernow
:
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).