HEADSUP: cpufreq import complete, acpi_throttling changed

[Nate Lawson]

Pawel Worach wrote:
> Tried this on my ThinkPad T41, seems to work great except I managed to 
> produce
> this message one time.
> 
> -- Power is plugged in here, freq=1700
> acpi_acad0: Off Line
> cpu0: Performance states changed
> -- Power unplugged, power_profile adjusted freq to 75 :)
> acpi_acad0: On Line
> -- Power reconnected, freq stayed at 75
> acpi_perf0: Px transition to 1700 failed
> acpi_perf0: set freq failed, err 6
> stray irq7
> stray irq7
> stray irq7
> stray irq7
> too many stray irq 7's: not logging anymore
> cpu0: Performance states changed
> -- Manually pushed freq back to 1700 without problems

I suspect something slowed the machine at that point in time?  Perhaps 
we exceeded the time for the transition in acpi_perf0.  I'll look into 
this a bit to be sure though.

> # sysctl dev.cpu
> 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: 1700
> dev.cpu.0.freq_levels: 1700/24500 1487/21437 1400/19500 1275/18375 
> 1225/17062 1200/16000 1062/15312 1000/13000 900/12000 875/12187 
> 850/12250 800/9500 750/10000 700/9750 637/9187 600/6000 525/7312 
> 500/6500 450/6000 425/6125 400/4750 375/4875 350/4875 300/4000 250/3250 
> 212/3062 175/2437 150/2000 125/1625 100/1187 75/750
> 
> Both acpi_perf.ko and cpufreq.ko loaded.

Hehe, 75 Mhz is 750 milliwatts.  You don't need to load cpufreq.ko since 
all that supports right now is Speedstep-ICH.  In the future, perhaps it 
will have a SpeedStep Pentium-M driver also.

-- 
Nate