From owner-freebsd-current@FreeBSD.ORG Sat May 3 16:37:10 2014 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 8C0CA761; Sat, 3 May 2014 16:37:10 +0000 (UTC) Received: from mail-qa0-x236.google.com (mail-qa0-x236.google.com [IPv6:2607:f8b0:400d:c00::236]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 169EF1C5E; Sat, 3 May 2014 16:37:10 +0000 (UTC) Received: by mail-qa0-f54.google.com with SMTP id j15so278021qaq.27 for ; Sat, 03 May 2014 09:37:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type:content-transfer-encoding; bh=CbA14A2fHx44b4O2YIv23ViZDG+z/b/71RlkI+M1CsE=; b=0k/DcEUF6lo5/hw5oyv8f7Vp68aOI2H/tui933YOZoiTC4z1F7vRNL99Z3x6jcRMAy g7vfZiQhIc/4Y53xl0Zp2rCYY4iVxHxN7i/FjQVQwE0lt4PDDl3LNPpRU2Rvy9moGQ0x P3DG8RKOUTNgrlCHKdO1s0VRz4kRgSsIX7topeVwxsVCh3EX5hA9Hi9iRTqJnLm+DJbc rQ5g7Swe/4bYt3GfkrewPD4MYmeKDs1xeydzFy9Qw2UTVCsWlUENHRvcXz3806Buy+VG QZ83Gtmxt4PkqzKnYSBvX3bwsudOfSxQ7hBW7fwM4gr1ZeM2zUnuIgcUG8OjZNOJBhL3 OLZw== MIME-Version: 1.0 X-Received: by 10.224.129.66 with SMTP id n2mr31756578qas.55.1399135028665; Sat, 03 May 2014 09:37:08 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.224.191.201 with HTTP; Sat, 3 May 2014 09:37:08 -0700 (PDT) In-Reply-To: <20140503155745.GA2457@La-Habana> References: <3F7430D7-3C0F-43E1-8EBD-8AA4F701497C@FreeBSD.org> <20140503155745.GA2457@La-Habana> Date: Sat, 3 May 2014 09:37:08 -0700 X-Google-Sender-Auth: v8sqdRgcX2M4K8UpaFh90JXm2Lo Message-ID: Subject: Re: Leaving the Desktop Market From: Adrian Chadd To: Matthias Apitz Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: freebsd-advocacy@freebsd.org, "current@freebsd.org" , David Chisnall , Eitan Adler , "freebsd-hackers@freebsd.org" , Jordan Hubbard X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 May 2014 16:37:10 -0000 Hi, I'm working on adding some more power management logging support to freebsd-head so we can start to get a better grip on sleep/wakeup occurances. That should help us start to figure out where the power consumption is going. But on that EEEPC 900, just make sure you've set dev.cpu.0.cx_lowest to something lower than C1. -a On 3 May 2014 08:57, Matthias Apitz wrote: > El d=C3=ADa Tuesday, April 01, 2014 a las 08:38:28AM +0100, David Chisnal= l escribi=C3=B3: > >> >> Just a small note here: Improving power management is something that the= Core Team and the Foundation have jointly identified as an important goal,= in particular for mobile / embedded scenarios. We're currently coordinati= ng potential sponsors for the work and soliciting proposals from people int= erested in doing the work. If you know of anyone in either category then p= lease drop either me, core, or the Foundation an email. >> > > Hello, > > Using every day one of my FreeBSD netbooks (see below), I know very well > that improving power management and by this the uptime while running on > battery is a serious issue. I'm currently surprised about the big > diff between two of my netbooks, one running 1 hour only while the other > runs ~4 hours. I'm thinking about building a cable connection between > the battery and the netbooks to measure the exact power drain (normally > one can not see this because the battery is connected into its bay and > you can not put any meter in there). > > I'm an experienced C-programmer and long time FreeBSD user and tester > and I'm willing to dig deeper into this work. Please let me know if > there is something to work on. > > Attached below is a description of the two mentioned netbooks and their > uptime values. > > Thanks > > matthias > > > > comparing battery life time of [EeePC 900] and [Acer Aspire One D250] > > > | EeePC 900 | Acer Aspire One D250 > ----------+-----------------------------+--------------------------------= ---- > CPU | 900 MHz Intel Celeron M 353 | 2x Intel Atom CPU N270 @ 1.60GH= z > RAM | 2 GByte | 1 GByte > disk | 2x SSD (4 GB, 16 GB) | WDC WD2500BEVT-22ZCT0 11.01A11 > | | ATA-8 SATA 2.x, 238475MB > display | TFT 1024x600 9" | TFT 1024x600 10" > FreeBSD | 10-CURRENT r255948 | 10-CURRENT r250588 > KDE | 4.10.5 | 3.5.10 > WAN (UMTS)| USB u3g Huawei E1750 | USB u3g Huawei E1750 > ----------+-----------------------------+--------------------------------= ---- > battery | Li-ion A22-701 7.4V 7200mAh | Li-ion UM08B74 11.1V 5200mAh / = 54Wh > | 53.380Wh | 57.720Wh > ----------+-----------------------------+--------------------------------= ---- > uptime | ~1 hours | ~4 hours > ----------+-----------------------------+--------------------------------= ---- > > > -- > Matthias Apitz | /"\ ASCII Ribbon Campaign: > E-mail: guru@unixarea.de | \ / - No HTML/RTF in E-mail > WWW: http://www.unixarea.de/ | X - No proprietary attachments > phone: +49-170-4527211 | / \ - Respect for open standards > | en.wikipedia.org/wiki/ASCII_Ribbon_Campaig= n > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org= "