Messages in this thread | | | Subject | Re: high power consumption in recent kernels | From | Peter Zijlstra <> | Date | Thu, 08 Jul 2010 13:58:23 +0200 |
| |
On Thu, 2010-07-08 at 04:57 -0700, Arjan van de Ven wrote: > 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. >
then wth is "[kernel scheduler] load balancing tick"? and for that matter, what is "[extra timer interrupt]", surely the timer hardware doesn't generate spurious interrupts?
| |