Date: Wed, 12 Nov 2008 14:41:02 +1100 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: "Alexandre \"Sunny\" Kovalenko" <gaijin.k@gmail.com> Cc: freebsd-acpi@freebsd.org, Nenhum_de_Nos <matheus@eternamente.info> Subject: Re: RFC: powerd algorithms enhancements Message-ID: <20081112142137.Q70117@sola.nimnet.asn.au> In-Reply-To: <1226449830.1244.30.camel@RabbitsDen> References: <491404BF.1090807@FreeBSD.org> <49186111.9020103@root.org> <a9fa663801c704c0ec9a2a8af2b2c689.squirrel@10.1.1.10> <20081111161549.U70117@sola.nimnet.asn.au> <7d13c992592d1976010179b40b26c057.squirrel@cygnus.homeunix.com> <1226449830.1244.30.camel@RabbitsDen>
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On Tue, 11 Nov 2008, Alexandre "Sunny" Kovalenko wrote: > On Tue, 2008-11-11 at 15:56 -0200, Nenhum_de_Nos wrote: > > On Tue, November 11, 2008 3:20 am, Ian Smith wrote: > > > On Mon, 10 Nov 2008, Nenhum_de_Nos wrote: > > > > as all you are talking about the subject, and I read all messages, is > > > > there any module to load and make my AthlonXP 1700+ use less power ? > > > > > > > > running 7-STABLE, just a file server. any acpi-stuff I could enable > > > would > > > > be great, as I just use all its power when compiling ... > > > > > > What does 'sysctl hw.acpi dev.cpu' have to say? > > > [...] Reinjecting a bit .. > hw.acpi.thermal.user_override: 0 > hw.acpi.thermal.tz0.temperature: 43.0C > hw.acpi.thermal.tz0.active: -1 > hw.acpi.thermal.tz0.passive_cooling: 1 > hw.acpi.thermal.tz0.thermal_flags: 0 > hw.acpi.thermal.tz0._PSV: 66.0C > hw.acpi.thermal.tz0._HOT: -1 > hw.acpi.thermal.tz0._CRT: 70.0C > hw.acpi.thermal.tz0._ACx: 66.0C -1 -1 -1 -1 -1 -1 -1 -1 -1 > hw.acpi.thermal.tz0._TC1: 4 > hw.acpi.thermal.tz0._TC2: 3 > hw.acpi.thermal.tz0._TSP: 60 > hw.acpi.cpu.cx_lowest: C1 Certainly no cpu frequency control. Surprisingly low _CRT temperature but unless it ever actually gets too hot, it's not a problem. I don't really follow why .passive-cooling=1 with no cpufreq driver/s attached? > > [root@xxx ~]# sysctl dev.cpu > > dev.cpu.0.%desc: ACPI CPU > > dev.cpu.0.%driver: cpu > > dev.cpu.0.%location: handle=\_PR_.CPU0 > > dev.cpu.0.%pnpinfo: _HID=none _UID=0 > > dev.cpu.0.%parent: acpi0 > > dev.cpu.0.cx_supported: C1/0 C2/90 C3/900 > > dev.cpu.0.cx_lowest: C1 > > dev.cpu.0.cx_usage: 100.00% 0.00% 0.00% > > [root@xxx ~]# > > > > if it rings any bells :) > All I can suggest here is > > sysctl dev.cpu.0.cx_lowest="C3" > > or, if it gets you totally unresponsive machine, > > sysctl dev.cpu.0.cx_lowest="C2" > > how much of the power saving you will see from this is the > separate question. If that works to any extent you'll notice some drop in cpu temperature. I do see a slight but noticeable idle temp. drop on my T23 in C2, though nothing compared to the power reduction of lower frequency (about half). cheers, Ian
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