Re: [Powertop] powertop putting far too much blame on wifi

On Monday 30 December 2013 at 09:36:08, Peter wrote:
> Hi:
> 
> I just got a Lenovo Yoga 2 Pro, and I'mrunning Fedora 20 on it.
> 
> I'm trying to get power usage down with powertop, but it is producing some
> screwy numbers.   When I run the machine with wifi on, I get idle
> consumption just under 7.2W but almost 5W of that is assigned to the WiFi
> interface, even though there is little traffic. When I turn the wifi off,
> power consumption only drops to just under 7W.  I don't think that there is
> a phantom WiFi that is still consuming power, so it appears to me that
> powertop is assigning too much blame to the WiFi interface.
> 
> Is there away of fixing the assignment of blame here?
> 
> peter
> 
> PS: Here are truncated typical powertop outputs, first with wifi on and then
> with wifi off.
> 
> 1/
> The battery reports a discharge rate of 7.15 W
> The estimated remaining time is 3 hours, 39 minutes
> 
> Summary: 251.9 wakeups/second, 4.2 GPU ops/seconds, 0.0 VFS ops/sec and 1.6%
> CPU use
> 
> Power est. Usage Events/s Category Description
>    4.82 W 1.2 pkts/s Device Network interface: wlp1s0 (iwlwifi)
>    1.72 W 10.0% Device Display backlight
>    131 mW 13.1 ms/s 188.4 Process /usr/lib64/thunderbird/thunderbird
>   11.7 mW 398.5 µs/s 19.9 Process [irq/61-iwlwifi]
> 
> 
> 2/
> The battery reports a discharge rate of 6.92 W
> The estimated remaining time is 3 hours, 42 minutes
> 
> Summary: 453.6 wakeups/second, 23.2 GPU ops/seconds, 0.0 VFS ops/sec and
> 3.0% CPU use
> 
> Power est. Usage Events/s Category Description
>    1.47 W 10.0% Device Display backlight
>    205 mW 14.4 ms/s 197.5 Process /usr/lib64/thunderbird/thunderbird
>    184 mW 2.2 ms/s 34.1 Process /usr/bin/xfce4-terminal
>    110 mW 2.4 ms/s 164.4 Interrupt PS/2 Touchpad / Keyboard / Mouse
> 
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Yeah. The computation algorithm seems totally off for me.

Currently I get 16.8W for backlight while total is 24W,
and CPU is reported to consume 0W despite ~70% usage.

-- 
Ivan Shapovalov / intelfx /

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