From owner-freebsd-stable@FreeBSD.ORG Tue Mar 20 23:47:24 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5289B106566C for ; Tue, 20 Mar 2012 23:47:24 +0000 (UTC) (envelope-from jamesbrandongooch@gmail.com) Received: from mail-yw0-f54.google.com (mail-yw0-f54.google.com [209.85.213.54]) by mx1.freebsd.org (Postfix) with ESMTP id 0F5268FC12 for ; Tue, 20 Mar 2012 23:47:23 +0000 (UTC) Received: by yhgm50 with SMTP id m50so722383yhg.13 for ; Tue, 20 Mar 2012 16:47:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=tI+44yYY8xMaFpHb37yu9W//G99piwJWPoQpFI0WrOA=; b=dNKs9uYseRsudW/KGNBFGms6nGrxEw7uBK1re8xwtXhnMV4BZb6GsNa3pGyDEfbLIT CRQUBcooOHs5tukdhWAYKt0t0WP1T9MOvNcIO9emp48Lfd+wOEZn+XKngLoyRqs8hXE2 sVnJo+JbNs7QwBf8jlDn1GQoCP612/wfw3nPizf70jQXgC2NnrGhBjDc4VUt4JmrCU1z AtC3dl/48sP2nXKgd1bDUK2k8aKhyNeXNGevkAlfA4fPxpkyXZ3AmD9yCDcpt6CF2hKq cXoNoiFQPwvFWa9hB7F3MkIz8xpvTa01tmF6dQj+6jE1DDas4fHx6M2eE0JRJc65h8dC /fTA== MIME-Version: 1.0 Received: by 10.60.13.196 with SMTP id j4mr2371682oec.14.1332287243497; Tue, 20 Mar 2012 16:47:23 -0700 (PDT) Received: by 10.60.17.10 with HTTP; Tue, 20 Mar 2012 16:47:23 -0700 (PDT) In-Reply-To: References: Date: Tue, 20 Mar 2012 18:47:23 -0500 Message-ID: From: Brandon Gooch To: Matthias Gamsjager Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-stable@freebsd.org Subject: Re: powerd and increase in energy need X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Mar 2012 23:47:24 -0000 On Tue, Mar 20, 2012 at 3:41 PM, Matthias Gamsjager wrote: > Hi, > > my zfs nas has an Asus p5e motherboard (x38 chip) and an intel q9300 (quad > core 2,5Ghz) processor with all the energy save setting enabled in the > bios. Today I connected the power cord to a voltcraft energy meter to see > how much energy the whole system needs in idle mode. > > I found out that with powerd running the cpu get clocked down to 499 mhz > with is nice. The funny thing is that this doesn't decrease the amount of > watts the machine need. 2,5ghz or 499mhz doen't matter at all. It gets even > funnier. With powerd running the systems actually needs 4 watts more then > without powerd running. > > Isn't the whole point of powerd to to decease the energy needs of a > machine? or is it utterly broken with this cpu generation? You probably want to check out the following article on the FreeBSD wiki: http://wiki.freebsd.org/TuningPowerConsumption The low-power states should be available to you after following the configuration guide. -Brandon