powerd adaptive mode latching

[Nate Lawson]

Stefan Lambrev wrote:
> It works :)
> 
> Nate Lawson wrote:
>> Nate Lawson wrote:
>>   Please test the patch.  I need at least one "it works" from someone who
>> has duplicated cpufreq states to commit it to -current.  Be sure to
>> first remove any acpi_perf patch that you previously applied.  Thanks.
>>
>>   
> I applied your patch on clean releng_7_0 from today an it works - here
> is the output from sysctl:
> 
> dev.cpu.0.freq_levels: 2201/35000 1925/30625 1650/26250 1600/23000
> 1400/20125 1200/16000 1050/14000 900/12000 800/14000 700/12250 600/10500

Thanks for testing.  Can you be sure the 2201 Mhz setting works
properly.  Perhaps you can set dev.cpu.0.freq=2201 then 1600 and be sure
it has approximately correct CPU performance.  One test I use is:

  dd if=/dev/zero bs=128k count=N | sha256

where "N" is some number that takes about 10 seconds to complete.

-- 
Nate