Re: Leaving the Desktop Market
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On 2014-05-04 10:28, Matthias Apitz wrote:
> El d=EDa Saturday, May 03, 2014 a las 04:59:48PM -0700, Kevin Oberman e=
scribi=F3:
>=20
>> On Sat, May 3, 2014 at 1:25 PM, Adrian Chadd <adrian@freebsd.org> wrot=
e:
>>
>>> 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=3D"Cmax"
>> economy_cx_lowest=3D"Cmax"
>>
>> But, unless you want laggy performance, you will probably also want:
>> hint.p4tcc.0.disabled=3D1
>> hint.acpi_throttle.0.disabled=3D1
>> in /boot/loader.conf. Low Cx states and TCC/throttling simply don't mi=
x
>> well and TCC is not effective, as mentioned earlier in this thread.
>=20
> Re/ powerd I have in /etc/rc.conf:
>=20
> # powerd
> powerd_enable=3D"YES"
> powerd_flags=3D"-a max -b adp"
> #
> performance_cx_lowest=3D"Cmax"
> economy_cx_lowest=3D"Cmax"
>=20
> (and the additional hint.* in /boot/loader.conf as well). Which process=
> 'performance_cx_lowest' and 'economy_cx_lowest' target exactly as confi=
g
> values?=20
>=20
> Thx
>=20
> matthias
>=20
In a pretty unscientific test on my laptop (Lenovo T530 with Intel i5
3320M), setting hw.acpi.cpu.cx_lowest=3DC8 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=3D1 was already set
(apparently solves some issue with powerd on some AMD systems)
I have added hint.p4tcc.0.disabled=3D1 but not sure where to expect to se=
e
a difference.
--=20
Allan Jude
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