Re: Leaving the Desktop Market

On 2014-05-04 11:47, Allan Jude wrote:
> On 2014-05-04 10:28, Matthias Apitz wrote:
>> El día Saturday, May 03, 2014 a las 04:59:48PM -0700, Kevin Oberman escribió:
>>
>>> On Sat, May 3, 2014 at 1:25 PM, Adrian Chadd <adrian_at_freebsd.org> wrote:
>>>
>>>> Set it to the lowest available Cx state that you see in dev.cpu.0 .
>>>>
>>>>
>>> Available is not required. Set it to C8. That guarantees that you will use
>>> the lowest available. The correct incantation in rc.conf is "Cmax".
>>> performance_cx_lowest="Cmax"
>>> economy_cx_lowest="Cmax"
>>>
>>> But, unless you want laggy performance, you will probably also want:
>>> hint.p4tcc.0.disabled=1
>>> hint.acpi_throttle.0.disabled=1
>>> in /boot/loader.conf. Low Cx states and TCC/throttling simply don't mix
>>> well and TCC is not effective, as mentioned earlier in this thread.
>>
>> Re/ powerd I have in /etc/rc.conf:
>>
>> # powerd
>> powerd_enable="YES"
>> powerd_flags="-a max -b adp"
>> #
>> performance_cx_lowest="Cmax"
>> economy_cx_lowest="Cmax"
>>
>> (and the additional hint.* in /boot/loader.conf as well). Which process
>> 'performance_cx_lowest' and 'economy_cx_lowest' target exactly as config
>> values? 
>>
>> Thx
>>
>> 	matthias
>>
> 
> In a pretty unscientific test on my laptop (Lenovo T530 with Intel i5
> 3320M), setting hw.acpi.cpu.cx_lowest=C8 lowered power consumption at
> idle by about 3 watts, which adds about 30-45 minutes to my battery life
> during conservative usage.
> 
> Using PCBSD 10, so hint.acpi_throttle.0.disabled=1 was already set
> (apparently solves some issue with powerd on some AMD systems)
> 
> I have added hint.p4tcc.0.disabled=1 but not sure where to expect to see
> a difference.
> 

I see the difference now, with the p4tcc stuff disabled, the lowest
cpufreq is now 1200mhz instead of 150mhz


-- 
Allan Jude