Messages in this thread | | | Date | Sun, 3 Jan 2010 20:55:45 +0100 | From | Pavel Machek <> | Subject | Re: [RFC][PATCH 12/12] PM / r8169: Add simplified run-time PM support |
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> > On notebooks, you can often use > > > > pavel@amd:/data/l/linux-msm/arch/arm/mach-msm$ cat > > /proc/acpi/battery/BAT0/state > > present: yes > > capacity state: ok > > charging state: charged > > present rate: 0 mW > > remaining capacity: 71830 mWh > > present voltage: 16277 mV > > > > ...present rate is often usable-enough. > > Using /proc/acpi/battery/BAT1/state I measured the energy drawn in 10 minutes > both with the network adapter in D0 and D3hot. The results were that with the > network adapter in D0 the box drew 2476 mWh, while with the network adapter in > D3hot it drew 2361 mWh. The difference is 115 mWh, or about 5% on this > particular box. > > This means about 0.1 Wh in 10 minutes, so we can save about 0.6 Wh per hour.
Which means it saves 0.6W :-). Measuring power in Wh/h is "interesting". Ok, that's consistent with my experiments, ethernet transciever was around 1W... Thanks. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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