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Date: Thu, 12 Jan 2006 01:11:52 -0500
From: Mike Jakubik <mikej@rogers.com>
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To: Daniel O'Connor <doconnor@gsoft.com.au>
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Cc: freebsd-stable@freebsd.org
Subject: Re: powerd effectiveness
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Daniel O'Connor wrote:
> Wow, that's weird, wish my AMD would do speeds like that :)
>
> As for your temperature observation - I have no idea sorry. It would appear 
> that powerd is doing the right thing but for some reason your CPU is not 
> benefiting. That said checking by measuring temperature is fraught with 
> complexity because there is probably a significant delay between a change in 
> power consumption and a corresponding chaange in heatsink temperature.
>   

Actually, i took readings from the wrong box :P

CPU: AMD Athlon(tm) Processor (1210.79-MHz 686-class CPU)
acpi0: <ASUS A7V> on motherboard

root@mail:~# 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.freq: 75
dev.cpu.0.freq_levels: 1215/-1 1139/-1 1063/-1 987/-1 911/-1 835/-1 
759/-1 683/-1 607/-1 531/-1 455/-1 379/-1 303/-1 227/-1 151/-1 75/-1

Thats the correct one, it is 75mhz. I was suspecting hardwares 
limitations in terms of modulating the frequency quickly enough. Just 
wanted to make sure.