Q: CPU Throttle 5.4-RELEASE

[haz hands]

I just installed R5.4 from R5.3 and have yet to figure
out if and how i can change the CPU throttle. I need
to do this as my cpu fan is bad and the cpu will
overheat under heavy load (i.e compiling a big program
or playing gnuchess). Before i had a script that would
throttle down the CPU if the temprature got above 75C
without this guard the CPU comes very close to over
heating ~85C.

I know that there is passive cool down (basically
doing what I like to do manually but at higher
tempratures and with less controle)

hw.acpi.thermal.min_runtime: 0
hw.acpi.thermal.polling_rate: 10
hw.acpi.thermal.tz0.temperature: 46.0C
hw.acpi.thermal.tz0.active: -1
hw.acpi.thermal.tz0.thermal_flags: 0
hw.acpi.thermal.tz0._PSV: 89.5C
hw.acpi.thermal.tz0._HOT: -1
hw.acpi.thermal.tz0._CRT: 93.0C
hw.acpi.thermal.tz0._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1
-1


Additionally

[0] cyh:~/ $ uname -a           
FreeBSD cyh-fbsd-box 5.4-RELEASE FreeBSD 5.4-RELEASE
#1: Sat Sep  3 16:58:10 CEST 2005    
cyh at .bredbandsbolaget.se:/usr/obj/usr/src/sys/GENERIC 
i386
[0] cyh:~/ $ dmesg| grep cpu
cpu0: <ACPI CPU (3 Cx states)> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
[0] cyh:~/ $ sysctl -a | grep cpu
kern.threads.virtual_cpu: 1
kern.ccpu: 1948
kern.smp.maxcpus: 1
kern.smp.cpus: 1
hw.ncpu: 1
hw.acpi.cpu.cx_supported: C1/1 C2/1 C3/85
hw.acpi.cpu.cx_lowest: C1
hw.acpi.cpu.cx_usage: 100.00% 0.00% 0.00%
machdep.cpu_idle_hlt: 1
dev.cpu.0.%desc: ACPI CPU (3 Cx states)
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.CPU_
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.freq: 1601
dev.cpu.0.freq_levels: 1601/-1 1400/-1 1200/-1 1000/-1
800/-1 600/-1 400/-1 200/-1
dev.acpi_throttle.0.%parent: cpu0
dev.cpufreq.0.%driver: cpufreq
dev.cpufreq.0.%parent: cpu0
[0] cyh:~/ $ 


Now in R5.3
I could just use the very straight forward
hw.acpi.cpu.throttle_state

and change that as i cheked the temprature when
needed.


Cheers
- Haz



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