Messages in this thread | | | Date | Wed, 4 Jan 2006 15:56:16 -0500 | From | Dave Jones <> | Subject | Re: 2.6.15-ck1 |
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On Thu, Jan 05, 2006 at 07:38:29AM +1100, Grant Coady wrote: > On Wed, 4 Jan 2006 14:05:54 -0500, Dave Jones <davej@redhat.com> wrote: > > >On Wed, Jan 04, 2006 at 12:00:00PM +1100, Con Kolivas wrote: > > > +2.6.15-dynticks-060101.patch > > > +dynticks-disable_smp_config.patch > > > Latest version of the dynticks patch. This is proving stable and effective on > > > virtually all uniprocessor machines and will benefit systems that desire > > > power savings. SMP kernels (even on UP machines) still misbehave so this > > > config option is not available by default for this stable kernel. > > > >I've been curious for some time if this would actually show any measurable > >power savings. So I hooked up my laptop to a gizmo[1] that shows how much > >power is being sucked. > > > >both before, and after, it shows my laptop when idle is pulling 21W. > >So either the savings here are <1W (My device can't measure more accurately > >than a single watt), or this isn't actually buying us anything at all, or > >something needs tuning. > > Or the laptop was still recharging the battery in both cases?
No, I made sure it was fully charged (and the charging light was off) before I started tests. I was tricked by the fact that you have to wait a while before things start happening.
Dave
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