From owner-cvs-src@FreeBSD.ORG Tue Aug 30 05:08:28 2005 Return-Path: X-Original-To: cvs-src@FreeBSD.org Delivered-To: cvs-src@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 44B7B16A420; Tue, 30 Aug 2005 05:08:28 +0000 (GMT) (envelope-from nate@root.org) Received: from ylpvm15.prodigy.net (ylpvm15-ext.prodigy.net [207.115.57.46]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8585A43D45; Tue, 30 Aug 2005 05:08:27 +0000 (GMT) (envelope-from nate@root.org) Received: from pimout6-ext.prodigy.net (pimout6-int.prodigy.net [207.115.4.22]) by ylpvm15.prodigy.net (8.12.10 outbound/8.12.10) with ESMTP id j7U58Zst030086; Tue, 30 Aug 2005 01:08:35 -0400 X-ORBL: [64.171.187.62] Received: from [10.0.0.115] (adsl-64-171-187-62.dsl.snfc21.pacbell.net [64.171.187.62]) by pimout6-ext.prodigy.net (8.13.4 outbound domainkey aix/8.13.4) with ESMTP id j7U58PL4306630; Tue, 30 Aug 2005 01:08:25 -0400 Message-ID: <4313E9C9.5050508@root.org> Date: Mon, 29 Aug 2005 22:08:25 -0700 From: Nate Lawson User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050723) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Bruno Ducrot References: <200508240752.j7O7qxep016309@repoman.freebsd.org> <43129EE6.7040608@root.org> <20050829073821.GI7749@poupinou.org> In-Reply-To: <20050829073821.GI7749@poupinou.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, Hajimu UMEMOTO , cvs-all@FreeBSD.org Subject: Re: cvs commit: src/usr.sbin/powerd powerd.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Aug 2005 05:08:28 -0000 Bruno Ducrot wrote: > On Sun, Aug 28, 2005 at 10:36:38PM -0700, Nate Lawson wrote: > >>Another mitigating factor is a patch I hope to commit soon that removes >>levels that aren't useful. The general idea is the same as a recent >>email from Tijl Coosemans but my approach is different. > > > I'm pretty sure it's incorrect to add p4tcc and acpi_throttle for power > saving purpose. I plan to add some flags in order to use only relevant > frequencies to this end, but IMHO that should be done at low-level > drivers. On the other hand, it is usefull to keep the existing sysctl > freqs, but for cooling purpose only. I think throttling, whether via p4tcc or acpi_throttle, is a useful addition to absolute frequency control (i.e. est or powernow). With appropriate tuning, as I hope the patch I committed provides, the additional levels should be helpful. -- Nate