Hi there. What should the kernel parms be for a hyperthreaded P4 to get
decent cpu speed throttling? (It's an ASUS P4800 P4 2.6, desktop).
My aim is to get frequency scaling work properly - that is, move from
a low CPU speed to full speed using the ondemand governor.
I tried enabling APM and ACPI (with all bells and whistles) in the kernel config, along with the CPU Frequency Scaling options. At startup I got an err in dmsg about APM not being SMP compliant, so I disabled that again at my next kernel build. (This is 2.6.16.9 #26 SMP PREEMPT, downloading the most recent one just now
However, I only get a clock range from 2275000 hz to 2600000 hz.
I was hoping to go from something much lower to 2,6Ghz, auto-changing depending on the load.
Any ideas what I should tweak?
Attached: relevant-looking things.
[root@tk cpufreq]# more cpuinfo_min_freq
2275000
[root@tk cpufreq]# more cpuinfo_max_freq
2600000
[root@tk cpufreq]# more scaling_available_frequencies
2275000 2600000
[root@tk cpufreq]# more scaling_available_governors
conservative ondemand powersave userspace performance
[root@tk cpufreq]# more scaling_governor
ondemand
[root@tk cpufreq]#
│[*] CPU Frequency scaling │ │
│ │[*] Enable CPUfreq debugging │ │
│ │ <*> CPU frequency translation statistics │ │
│ │[*] CPU frequency translation statistics details │ │
│ │ Default CPUFreq governor (userspace) ---> │ │
│ │ <*> 'performance' governor │ │
│ │ <*> 'powersave' governor │ │
│ │ --- 'userspace' governor for userspace frequency scaling │ │
│ │ <*> 'ondemand' cpufreq policy governor │ │
│ │ <*> 'conservative' cpufreq governor │ │
│ │ --- CPUFreq processor drivers │ │
│ │ <*> ACPI Processor P-States driver │ │
│ │ < > AMD Mobile K6-2/K6-3 PowerNow! │ │
│ │ < > AMD Mobile Athlon/Duron PowerNow! │ │
│ │ < > AMD Opteron/Athlon64 PowerNow! │ │
│ │ < > Cyrix MediaGX/NatSemi Geode Suspend Modulation │ │
│ │ <*> Intel Enhanced SpeedStep │ │
│ │[*] Use ACPI tables to decode valid frequency/voltage pairs │ │
│ │[*] Built-in tables for Banias CPUs │ │
│ │ <*> Intel Speedstep on ICH-M chipsets (ioport interface) │ │
│ │ <*> Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface) │ │
│ │ <*> Intel Pentium 4 clock modulation │ │
│ │ < > nVidia nForce2 FSB changing
Thanks a lot,
Turgut Kalfaoglu