On Sunday 03 January 2010, Pavel Machek wrote: > > > > 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". You can't save power, you can only save energy. Wh is just an energy unit. > Ok, that's consistent with my experiments, ethernet transciever was around 1W... Thanks. No big deal. Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
