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#1 2010-08-27 11:07:09

suggy
Member
Registered: 2008-08-12
Posts: 15

High wakeups per second (powertop)

Hi all,
I've noticed that my wakeups per second are really high with powertop

Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        (21.4%)         1500 Mhz    25.3%
polling           0.6ms ( 0.0%)         1000 Mhz    74.7%
C1 mwait          0.0ms ( 0.0%)
C2 mwait          0.5ms (14.6%)
C4 mwait          0.9ms (64.0%)

Wakeups-from-idle per second : 974.8    interval: 10.0s
Power usage (5 minute ACPI estimate) :  23.1 W (1.8 hours left)

Top causes for wakeups:
  28.2% (367.9)   PS/2 keyboard/mouse/touchpad interrupt
  18.9% (245.9)   [kernel scheduler] Load balancing tick
  12.4% (161.1)   [extra timer interrupt]
  10.7% (139.5)   firefox
  10.0% (130.6)   [i915@pci:0000:00:02.0] <interrupt>
   8.3% (108.2)   plugin-containe
   2.8% ( 37.1)   [iwl3945] <interrupt>

I'm running a custom compiled 2.6.35.3 kernel, which is based on the config from arch's 2.6.35.3 package with the only things that have been changed are removal of unneeded driver modules and the cpu type changed to core2/newer xeon (to aid powersaving).

Is this actually a normal amount of wakeups or is there anything i can do?

Any ideas or advice greatly appreciated! In other words muchas thankyas!

Last edited by suggy (2010-08-27 11:07:57)

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#2 2010-08-27 11:30:49

karol
Archivist
Registered: 2009-05-06
Posts: 25,440

Re: High wakeups per second (powertop)

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#3 2010-08-27 12:14:12

suggy
Member
Registered: 2008-08-12
Posts: 15

Re: High wakeups per second (powertop)

D'oh, cheers for the headups karol... should i delete this thread?

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#4 2010-08-27 12:31:27

karol
Archivist
Registered: 2009-05-06
Posts: 25,440

Re: High wakeups per second (powertop)

Mods can close it if they want - I've already pinged them.

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#5 2010-08-27 14:25:33

.:B:.
Forum Fellow
Registered: 2006-11-26
Posts: 5,819
Website

Re: High wakeups per second (powertop)

There's no need to close this until it's clear the issue is identical to the one in the thread karol linked to.


Got Leenucks? :: Arch: Power in simplicity :: Get Counted! Registered Linux User #392717 :: Blog thingy

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#6 2010-08-27 14:32:23

karol
Archivist
Registered: 2009-05-06
Posts: 25,440

Re: High wakeups per second (powertop)

.:B:. wrote:

There's no need to close this until it's clear the issue is identical to the one in the thread karol linked to.

If downgrading to .34 isn't too much trouble, OP can check whether the problem is indeed .35-related.

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#7 2010-08-27 14:42:36

suggy
Member
Registered: 2008-08-12
Posts: 15

Re: High wakeups per second (powertop)

Yup i'm up for that if i can get hold of the package, or perhaps at least the default arch config for .34, i pacman -Scc'd unfortunatly yikes My bad!!

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#8 2010-08-27 14:51:40

karol
Archivist
Registered: 2009-05-06
Posts: 25,440

Re: High wakeups per second (powertop)

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#9 2010-08-27 15:48:46

suggy
Member
Registered: 2008-08-12
Posts: 15

Re: High wakeups per second (powertop)

Cheers karol! It'll have to wait until after the weekend now tho, on a really slow connection atm! Dial-up-like speeds are not good!!!!!

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