Date: Mon, 17 Oct 2005 12:53:18 +0530 From: "Srikanth, Throvagunta" <sthrovag@gmail.com> To: Emanuel Strobl <Emanuel.strobl@gmx.net> Cc: freebsd-questions@freebsd.org Subject: Re: acpi_thorttle and cpufreq/ichss questions Message-ID: <ec924de90510170023q553ff46frca4df423e83c57c8@mail.gmail.com>
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Harry, ACPI throttling is closely system-dependent. FreeBSD does its best at arriving at the right values. I recommend you should look into sources for complete answers. By the way, you have forgot to mention the version [like 6.0] of FreeBSD you are actually running on your laptop. That will be useful information to give for an answer. --Srikanth -- Date: Wed, 28 Sep 2005 14:49:32 +0200 From: Emanuel Strobl <Emanuel.strobl@gmx.net> To: freebsd-questions@freebsd.org Subject: acpi_thorttle and cpufreq/ichss questions Hello, my laptop (PIII LV) runs fine with cpufreq and ichss: dev.ichss.0.%desc: SpeedStep ICH dev.ichss.0.%driver: ichss dev.ichss.0.%parent: cpu0 dev.ichss.0.freq_settings: 794/-1 497/-1 If I understand the output correctly i have two SpeedSteps, the full 800MHz= =3D=3D20 (with higher voltage) and 500MHz. But now I also have acpi_throttle (if I don't disable it=3D20 in /boot/loader.conf): dev.acpi_throttle.0.%desc: ACPI CPU Throttling dev.acpi_throttle.0.%driver: acpi_throttle dev.acpi_throttle.0.%parent: cpu0 dev.acpi_throttle.0.freq_settings: 10000/-1 8750/-1 7500/-1 6250/-1 5000/-1= =3D=3D20 3750/-1 2500/-1 1250/-1 What do these values tell me? I think that are divisors, but how can I see= =3D=3D20 which one is used? I remember that some time back I saw at boot time some= =3D20 information about "throttle has xx steps, currently using 100%" or=3D20 something like that. Can I constrain the divisors, lets say I want to have only 10000, 7500 and= =3D=3D20 5000? (I know I can limit the lowest frequency cpufreq may use with=3D20 "debug.cpufreq.lowest=3D3D310" but then I don't know if it throttles the=3D= 20 800MHz mode (thus using high core voltage) or if it throttles the power=3D2= 0 saving 500MHz mode) And what does this tell me: hw.acpi.cpu.cx_supported: C1/0 C2/10 C3/85 hw.acpi.cpu.cx_lowest: C1 hw.acpi.cpu.cx_usage: 100.00% 0.00% 0.00% Thanks in advance, =3D2DHarry
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