Messages in this thread | | | From | Con Kolivas <> | Subject | Re: [patch] i386 dynamic ticks 2.6.13-rc4 (code reordered) | Date | Tue, 2 Aug 2005 17:39:19 +1000 |
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On Tue, 2 Aug 2005 05:17 pm, Tony Lindgren wrote: > * Lee Revell <rlrevell@joe-job.com> [050801 23:24]: > > On Tue, 2005-08-02 at 15:56 +1000, Con Kolivas wrote: > > > On Tue, 2 Aug 2005 03:52 pm, Lee Revell wrote: > > > > On Tue, 2005-08-02 at 15:49 +1000, Con Kolivas wrote: > > > > > As a crude data point of idle system running a full kde desktop > > > > > environment on > > > > > powersave with minimal backlight and just chatting on IRC I find > > > > > it's just > > > > > under 10% battery life difference. > > > > > > > > Have you tried the same test but without artsd, or with it configured > > > > to release the sound device after some reasonable time, like 1-2s? > > > > > > I have it on release after 1 second already. > > > > Is there any difference in power use between this, and not running artsd > > at all? > > Please have the pmstats from http://www.muru.com/linux/dyntick running > in once console with pmstats 5, and then just kill programs to find out > which ones use lots of timers. CPU monitors etc. > > You should get X running at about 25HZ, (which is the PIT limit usually) > Higher ticks means means polling somewhere which totally kills any power > savings.
Ok I seem to be bottoming out at 130Hz. I can't seem to kill off anything more.
> > There's still some places in kernel that also do polling as far as I > remember: > > - AT keyboard if no keyboard connected > - Netfilter code (Unverified) > > But this you can verify by booting to single user mode and then running > pmstats 5, and if ticks is not below 25HZ, there's something in the kernel > polling.
I'm removing modules and they don't seem to do anything so I'm not sure what else to try.
Cheers, Con - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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