Date: Fri, 13 Nov 2009 01:48:34 +1100 From: "David Rawling" <djr@pdconsec.net> To: "Robin Becker" <robin@reportlab.com> Cc: freebsd-questions@freebsd.org Subject: RE: atom based servers Message-ID: <BFDFFE175893404B8BC865EE888E83B80122C7@pd-exbe.pdconsec.local> References: <4AFB3A2A.4040303@brianwhalen.net> <BFDFFE175893404B8BC865EE888E83B80122C4@pd-exbe.pdconsec.local> <4AFBDFFF.9020603@chamonix.reportlab.co.uk>
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Robin Becker opined:
...
>I have one of the Acer ION gadgets running at home and that also uses =
the Atom=20
>330. I cannot find any nice way to reduce the power consumption though =
as the=20
>330 doesn't seem to support speedstep and my cpu is always running at =
68C. Does
>your board provide any power control opportunity?
sysctl dev.cpu.0.freq reports that my CPU is running at 202 or 404MHz =
generally:
timeserver ~ 127# sysctl dev.cpu.0.freq
dev.cpu.0.freq: 404
timeserver ~ 128# sysctl dev.cpu.0.freq_levels
dev.cpu.0.freq_levels: 1618/-1 1415/-1 1213/-1 1011/-1 809/-1 606/-1 =
404/-1 202/-1
I notice the only C states are C0 and C1, and that it's generally =
running in C1:
timeserver ~ 136# sysctl dev.cpu.0
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=3D\_PR_.CPU0
dev.cpu.0.%pnpinfo: _HID=3Dnone _UID=3D0
dev.cpu.0.%parent: acpi0
dev.cpu.0.freq: 202
dev.cpu.0.freq_levels: 1618/-1 1415/-1 1213/-1 1011/-1 809/-1 606/-1 =
404/-1 202/-1
dev.cpu.0.cx_supported: C1/0
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_usage: 100.00% last 500us
lmmon is not particularly helpful for anything on this board, but that =
could be
because I'm using the Generic kernel and /dev/smb0 is not present:
timeserver ~ 134# lmmon -i
Motherboard Temp Voltages
255C / 491F / 528K Vcore1: +3.984V
Vcore2: +3.984V
Fan Speeds + 3.3V: +3.984V
+ 5.0V: +6.654V
1: 0 rpm +12.0V: +15.938V
2: 0 rpm -12.0V: -15.938V
3: 0 rpm - 5.0V: -6.654V
Do you have any other suggestions of tools I could use to help answer =
your question?
Perhaps the lack of other C states is causing the excess power =
consumption (or
perhaps your system is more heavily loaded)? I'm assuming for the sake =
of simplicity
that powerd is already enabled (I'm running with powerd_flags=3D"-i 85 =
-r 60 -p 100")?
Dave.
--
David Rawling
PD Consulting And Security
Email: djr@pdconsec.net
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