ACPI slowing CPU... or something else

[V.I.Victor]

On Wed, 25 Jul 2007, Garrett Cooper wrote:

> V.I.Victor wrote:
>>  I've two 5.4 desktop boxes.  Pretty much the same installation; both
>>  from the same CD, same apps, no monitor/keyboard, 1-user logged-on via
>>  ssh (command-line only w/no gui) and otherwise lightly loaded.
>>
>>  Box_A: CPU: AMD-K7(tm) Processor (598.84-MHz 686-class CPU)
>>         avail memory = 121630720 (115 MB)
>>         ACPI disabled by blacklist.
>>
>>  Box_B: CPU: Intel(R) Pentium(R) 4 CPU 1.80GHz (1794.19-MHz 686-class CPU)
>>         avail memory = 252186624 (240 MB)
>>         cpu0: <ACPI CPU> on acpi0
>>         acpi_throttle0: <ACPI CPU Throttling> on cpu0
>>...

> Yes. On my virtual machine with ACPI:
>
> dev.cpu.0.freq: 2653
> dev.cpu.0.freq_levels: 2653/-1 2321/-1 1989/-1 1658/-1 1326/-1 994/-1 663/-1
> 331/-1
>
> [root at optimus-vm-7 ~]# dmesg | grep 26
> FreeBSD 7.0-CURRENT #5: Tue Jul 17 08:22:26 UTC 2007
> CPU: Intel(R) Core(TM)2 CPU          6700  @ 2.66GHz (2666.79-MHz K8-class
> CPU)
> Timecounter "TSC" frequency 2666794890 Hz quality 800
>
> What are the following sysctls set to?
>
> kern.clockrate
> hw.acpi.cpu.cx_lowest
> dev.cpu.0.cx_lowest
> dev.cpu.0.cx_usage

Thanks for the reply!  I don't seem to have the last 2 you've asked about. 

'sysctl -a | egrep "clockrate|cpu"' reported the following:

kern.clockrate: { hz = 100, tick = 10000, profhz = 1024, stathz = 128 }
kern.threads.virtual_cpu: 1
kern.ccpu: 1948
kern.smp.maxcpus: 1
kern.smp.cpus: 1
hw.ncpu: 1
hw.clockrate: 1794
hw.acpi.cpu.cx_supported: C1/0
hw.acpi.cpu.cx_lowest: C1
hw.acpi.cpu.cx_usage: 100.00%
machdep.cpu_idle_hlt: 1
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: 1796
dev.cpu.0.freq_levels: 1796/-1 1571/-1 1347/-1 1122/-1 898/-1 673/-1 449/-1 224/-1
dev.acpi_throttle.0.%parent: cpu0
dev.cpufreq.0.%driver: cpufreq
dev.cpufreq.0.%parent: cpu0