Messages in this thread | | | Date | Thu, 8 Jul 2010 04:57:11 -0700 | From | Arjan van de Ven <> | Subject | Re: high power consumption in recent kernels |
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On Thu, 08 Jul 2010 11:06:32 +0200 Peter Zijlstra <peterz@infradead.org> wrote:
> On Wed, 2010-07-07 at 01:45 +0900, Norbert Preining wrote: > > > it seems that some of the (?)recent(?) changes have increased the > > power consumption of my note book considerably. > > > > First of all, running powertop with normal programs started, but > > doing nothing, I am still at 14W while I could go down to 9W before > > (but the 9W was with dimmed display). > > > > In the list of top causes for wakeup I have > > Top causes for wakeups: > > 34.2% (185.3) [kernel scheduler] Load balancing tick > > 23.9% (129.6) [extra timer interrupt] > > 10.8% ( 58.6) firefox-bin > > 9.2% ( 49.7) [iwlagn] <interrupt> > > 7.2% ( 39.1) [kernel core] hrtimer_start (tick_sched_timer) > > 3.9% ( 20.9) PS/2 keyboard/mouse/touchpad interrupt > > which show one new thing to me I haven't seen before, the Loa > > balancing tick. > > I think that is what powertop calls our regular tick (Arjan?), and as
it's "hrtimer_start_range_ns (tick_sched_timer)" if it's done by the idle thread.
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