Power-Mgt (Was: Re: cvs commit: src/sys/i386/cpufreq est.c )

[Joao Barros]

On Tue, Mar 18, 2008 at 1:54 PM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
>
> >To avoid lots of code duplication I think we would need to provide some sort
> >of "idle" device support in new-bus.  Possibly something like this:
>
> We need different levels of "active" also, EnergyStar requires machines
> to reduce ethernet speed from GE to 100M when idle, (this saves approx
> 2W, 1W in either end of the cable).

It's common practice to force connection speeds on both switches and
NICs in datacenter environments.
When I find a machine with a nic connected at 10mbit Half Duplex I
already know it's forced on the switch and someone forgot to setup the
server correctly.
What I'm saying is, if something is about to automagically happen,
people should be aware of it. *Big neon lights* :-)

-- 
Joao Barros