From owner-freebsd-arch@FreeBSD.ORG Tue Mar 18 16:04:06 2008 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BC29E1065674 for ; Tue, 18 Mar 2008 16:04:06 +0000 (UTC) (envelope-from brooks@lor.one-eyed-alien.net) Received: from lor.one-eyed-alien.net (cl-162.ewr-01.us.sixxs.net [IPv6:2001:4830:1200:a1::2]) by mx1.freebsd.org (Postfix) with ESMTP id 3AA2C8FC17 for ; Tue, 18 Mar 2008 16:04:06 +0000 (UTC) (envelope-from brooks@lor.one-eyed-alien.net) Received: from lor.one-eyed-alien.net (localhost [127.0.0.1]) by lor.one-eyed-alien.net (8.14.1/8.13.8) with ESMTP id m2IG4454066617; Tue, 18 Mar 2008 11:04:04 -0500 (CDT) (envelope-from brooks@lor.one-eyed-alien.net) Received: (from brooks@localhost) by lor.one-eyed-alien.net (8.14.2/8.14.2/Submit) id m2IG44ts066616; Tue, 18 Mar 2008 11:04:04 -0500 (CDT) (envelope-from brooks) Date: Tue, 18 Mar 2008 11:04:04 -0500 From: Brooks Davis To: Joao Barros Message-ID: <20080318160404.GD57911@lor.one-eyed-alien.net> References: <200803180840.18275.jhb@freebsd.org> <1031.1205848495@critter.freebsd.dk> <70e8236f0803180804v692c2abs7eb296317cb84ed1@mail.gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="AbQceqfdZEv+FvjW" Content-Disposition: inline In-Reply-To: <70e8236f0803180804v692c2abs7eb296317cb84ed1@mail.gmail.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (lor.one-eyed-alien.net [127.0.0.1]); Tue, 18 Mar 2008 11:04:05 -0500 (CDT) Cc: Poul-Henning Kamp , freebsd-arch@freebsd.org Subject: Re: Power-Mgt (Was: Re: cvs commit: src/sys/i386/cpufreq est.c ) X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Mar 2008 16:04:06 -0000 --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 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--