On 03/01/10 18:52, Auke Kok wrote:
> On 02/27/10 16:10, Konnor Jean wrote:
>> I applied almost all the powersaving tricks and tips from lesswatts.org
>> and still on total idle with the screen dimmed to maximum, my laptop is
>> draining over 72 Watts. Here is what's PowerTop is saying:
>>
>> ------------------------------------------------------------------------------------------------------------------------------
>>
>>
>> < Detailed C-state information is not P-states (frequencies)
>> 1.60 Ghz 0.0%
>> 800 Mhz 100.0%
>>
>>
>> Wakeups-from-idle per second : 451.1 interval: 10.0s
>> Power usage (5 minute ACPI estimate) : 72.5 W (0.3 hours left)
>>
>> Top causes for wakeups:
>> 45.3% (407.4)<kernel IPI> : Rescheduling interrupts
>> 29.9% (269.2)<kernel core> : hrtimer_start_range_ns
>> (tick_sched_timer)
>> 7.2% ( 65.1)<interrupt> : extra timer interrupt
>> 5.6% ( 50.0) touchfreeze : hrtimer_start_range_ns
>> (hrtimer_wakeup)
>> 5.3% ( 48.1)<interrupt> : ath
>> 1.9% ( 17.4) thunderbird-bin : hrtimer_start_range_ns
>> (hrtimer_wakeup)
>> 1.0% ( 9.1)<interrupt> : nvidia
>> 0.6% ( 5.8) cairo-dock : hrtimer_start_range_ns
>> (hrtimer_wakeup)
>> 0.6% ( 5.0)<kernel core> : hrtimer_start (tick_sched_timer)
>> 0.3% ( 3.0) rainlendar2 : hrtimer_start_range_ns
>> (hrtimer_wakeup)
>> 0.3% ( 2.6)<kernel IPI> : TLB shootdowns
>> 0.2% ( 2.0)<interrupt> : sata_nv
>> 0.2% ( 2.0) thunderbird-bin : sk_reset_timer (tcp_write_timer)
>> 0.2% ( 2.0) emerald : hrtimer_start_range_ns
>> (hrtimer_wakeup)
>> 0.2% ( 1.7) gnome-terminal : hrtimer_start_range_ns
>> (hrtimer_wakeup)
>> 0.1% ( 1.3)<kernel core> : sk_reset_timer (tcp_delack_timer)
>> 0.1% ( 1.1) checkgmail : hrtimer_start_range_ns
>> (hrtimer_wakeup)
>> 0.1% ( 1.0) cpupowerd : hrtimer_start_range_ns
>> (hrtimer_wakeup)
>> 0.1% ( 1.0)<kernel core> : nv_kern_rc_timer (nv_kern_rc_timer)
>> 0.1% ( 0.7) gam_server : hrtimer_start_range_ns
>> (hrtimer_wakeup)
>> ------------------------------------------------------------------------------------------------------------------------------
>>
>>
>>
>> If I surf the web or listen to music, wakeups go haywire reaching 2500+
>> Please, help me with that as I am getting barely 15 minutes of battery
>> life while in windows it is well over an hour.
>
> only an hour of battery life ? wow :)
>
> what kind of hardware are we actually talking about? 70W is crazy for
> a laptop.
Compaq V6065ea, Turion X2 1.6ghz undervolted to 0.7V/1.05V
The usage varies and the lowest I have seen was around 28W.
> take a look at /proc/interrupts (watch -d cat /proc/interrupts) and
> see if some of your hardware is causing excessive interrupts.
Every 2.0s: cat /proc/interrupts Mon Mar 8
14:56:33 2010
CPU0 CPU1
0: 43200401 15485252 IO-APIC-edge timer
1: 53059 20244 IO-APIC-edge i8042
5: 0 8 IO-APIC-fasteoi ohci1394
7: 4 2 IO-APIC-fasteoi mmc0
8: 0 1 IO-APIC-edge rtc0
9: 50068 14384 IO-APIC-fasteoi acpi
12: 119191 75327 IO-APIC-edge i8042
14: 381525 136439 IO-APIC-edge ide0
18: 1071404 173740 IO-APIC-fasteoi nvidia
19: 12278164 5917480 IO-APIC-fasteoi ath
20: 0 0 IO-APIC-fasteoi eth0
21: 51599 5536508 IO-APIC-fasteoi HDA Intel
22: 777520 338565 IO-APIC-fasteoi ehci_hcd:usb1, ohci_hcd:usb2
23: 692096 428614 IO-APIC-fasteoi sata_nv
NMI: 0 0 Non-maskable interrupts
LOC: 55242618 54759070 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 0 0 Performance monitoring interrupts
PND: 0 0 Performance pending work
RES: 31042685 32946081 Rescheduling interrupts
CAL: 867563 819487 Function call interrupts
TLB: 66640 61077 TLB shootdowns
ERR: 1
MIS: 5
I do not have much idea what does it mean.
> as for the 70+ watt number, that's most likely not due to the software
> but rather likely due to a kernel driver leaving some hardware device
> (graphics?) on at full power (compositing enabled?) or even dead
> hardware. does your laptop get really hot? a spinning fan can up the
> power envelope by lots of watts as well, throwing you in a viscious
> circle...
Computer is running on minimal power, with most elements enabled (eg:
expresscard, dimmed screen, no usb devices, disk in low-power mode,
audio in power-saving mode). Fans are idling, laptop is reasonably cool.
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