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 <g...@unixarea.de> wrote: > El día Tuesday, April 01, 2014 a las 08:38:28AM +0100, David Chisnall > escribió: > >> >> 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 coordinating >> potential sponsors for the work and soliciting proposals from people >> interested in doing the work. If you know of anyone in either category then >> please 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 @ 1.60GHz > 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: g...@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_Campaign > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org" _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
