From owner-freebsd-arch@FreeBSD.ORG Tue Mar 18 15:33:01 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 0D48A1065670 for ; Tue, 18 Mar 2008 15:33:01 +0000 (UTC) (envelope-from joao.barros@gmail.com) Received: from gv-out-0910.google.com (gv-out-0910.google.com [216.239.58.191]) by mx1.freebsd.org (Postfix) with ESMTP id A32078FC1B for ; Tue, 18 Mar 2008 15:33:00 +0000 (UTC) (envelope-from joao.barros@gmail.com) Received: by gv-out-0910.google.com with SMTP id n40so1250778gve.39 for ; Tue, 18 Mar 2008 08:32:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=qhFIyvavbSLPsn+K5gkgd2m5SDe4747TSQaPIcR22q4=; b=iSDT6qNHC19BXfsqRWG5MvBFFDsDbA2LsiBx8WoAqfQ6I6OZ29HVXY5z3PDwf5BWI/1NacJQeQBEDvrpZiG79OYM/bxLcPPyYNZAi4M6Q9m20vPhCfUsAkgJCjq/rLKThQOZBPyrwz/qqOZS2OrBi0R4qhJVwUXCd1dAdC5eC+0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=t9V6f3IGJZwEuumHzjDwsxm4RvNfxYnsc7LafDpSqlFQ9FjedPRuBSAEQw81LTj05bdKc7SPe1GmKSX5aLN8DkI4J28xJkzl+1Xfcv+yEPhMNfox3PPNV9XqtQ8MHHEnPViVOlY/U369mgJpEJnO4xa14uMPE2O4fF6D33gCl2U= Received: by 10.142.191.2 with SMTP id o2mr1039607wff.209.1205852676571; Tue, 18 Mar 2008 08:04:36 -0700 (PDT) Received: by 10.143.160.17 with HTTP; Tue, 18 Mar 2008 08:04:36 -0700 (PDT) Message-ID: <70e8236f0803180804v692c2abs7eb296317cb84ed1@mail.gmail.com> Date: Tue, 18 Mar 2008 15:04:36 +0000 From: "Joao Barros" To: "Poul-Henning Kamp" In-Reply-To: <1031.1205848495@critter.freebsd.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <200803180840.18275.jhb@freebsd.org> <1031.1205848495@critter.freebsd.dk> Cc: 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 15:33:01 -0000 On Tue, Mar 18, 2008 at 1:54 PM, Poul-Henning Kamp 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