Re: 2.6.15-ck1

[Dave Jones <davej@redhat.com>]

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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