Re: HEADSUP: cpufreq import complete, acpi_throttling changed

Great! It would be nice if you can document this new facility in the 
Handbook, since it is likely to be of interest for very large percentage 
of FreeBSD users. Also, it should be mentioned in the release notes.

-Maxim

Nate Lawson wrote:
> I've finished the major work of importing cpufreq.  As part of this, the 
> sysctls for acpi throttling have been removed.  The power_profile script 
> has been updated, so you can use performance/economy_cpu_freq= in 
> rc.conf to set AC on/offline cpu frequencies.  The acpi throttling 
> support has been compiled into acpi_perf.ko so load that to get 
> throttling.  Do a sysctl dev.cpu to get an understanding of the cpufreq 
> sysctls.
> 
> If you have throttling, please test the new configuration to be sure it 
> still works as before.  Final upcoming work will be manpage support and 
> bugfixing as necessary.
> 
> I'd also like to issue a call for developers to help by porting older 
> drivers (like longrun) and out-of-tree new drivers (like powernow-k7/k8 
> and speedstep-m) to the cpufreq interface.  It's very simple and you 
> just have to figure out if your driver is absolute or relative, and 
> convert values to the proper units (percent in hundredths, power in mW, 
> etc.)  Once that is done, please send me the diff for review before 
> commit so I can make sure it works properly.
> 
> Thanks,