Date: Tue, 18 Mar 2008 11:04:04 -0500 From: Brooks Davis <brooks@freebsd.org> To: Joao Barros <joao.barros@gmail.com> Cc: Poul-Henning Kamp <phk@phk.freebsd.dk>, freebsd-arch@freebsd.org Subject: Re: Power-Mgt (Was: Re: cvs commit: src/sys/i386/cpufreq est.c ) Message-ID: <20080318160404.GD57911@lor.one-eyed-alien.net> In-Reply-To: <70e8236f0803180804v692c2abs7eb296317cb84ed1@mail.gmail.com> References: <200803180840.18275.jhb@freebsd.org> <1031.1205848495@critter.freebsd.dk> <70e8236f0803180804v692c2abs7eb296317cb84ed1@mail.gmail.com>
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--AbQceqfdZEv+FvjW Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Mar 18, 2008 at 03:04:36PM +0000, Joao Barros wrote: > On Tue, Mar 18, 2008 at 1:54 PM, Poul-Henning Kamp <phk@phk.freebsd.dk> w= rote: > > > > >To avoid lots of code duplication I think we would need to provide som= e 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). >=20 > 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* :-) I'd think any implementation would only be on if autoneg is on... -- Brooks --AbQceqfdZEv+FvjW Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (FreeBSD) iD8DBQFH3+fzXY6L6fI4GtQRAldEAKC1VuqdN7h1XwVxgPpZvWDKBrlBjgCeIXE/ Up6vQ95vyjBMS/l/WdTpFYQ= =Efzk -----END PGP SIGNATURE----- --AbQceqfdZEv+FvjW--
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