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processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 3
microcode : 0x5
cpu MHz : 2800.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc pebs bts nopl pni dtes64 monitor ds_cpl est cid cx16 xtpr
bogomips : 6030.18
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 3
microcode : 0x5
cpu MHz : 2800.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc pebs bts nopl pni dtes64 monitor ds_cpl est cid cx16 xtpr
bogomips : 6030.37
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:but only p4-clockmod works.
[]sudo modprobe acpi-cpufreq
ERROR: could not insert 'acpi_cpufreq': Input/output error
[]sudo modprobe p4-clockmod
....
[]$ sudo cpupower -c 0,1 frequency-info
analyzing CPU 0:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 0 1
CPUs which need to have their frequency coordinated by software: 0 1
maximum transition latency: 10.00 ms.
hardware limits: 350 MHz - 2.80 GHz
available frequency steps: 350 MHz, 700 MHz, 1.05 GHz, 1.40 GHz, 1.75 GHz, 2.10 GHz, 2.45 GHz, 2.80 GHz
available cpufreq governors: ondemand, performance
current policy: frequency should be within 350 MHz and 2.80 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 2.80 GHz (asserted by call to hardware).
boost state support:
Supported: no
Active: no
analyzing CPU 1:
driver: p4-clockmod
CPUs which run at the same hardware frequency: 0 1
CPUs which need to have their frequency coordinated by software: 0 1
maximum transition latency: 10.00 ms.
hardware limits: 350 MHz - 2.80 GHz
available frequency steps: 350 MHz, 700 MHz, 1.05 GHz, 1.40 GHz, 1.75 GHz, 2.10 GHz, 2.45 GHz, 2.80 GHz
available cpufreq governors: ondemand, performance
current policy: frequency should be within 350 MHz and 2.80 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 2.80 GHz (asserted by call to hardware).
boost state support:
Supported: no
Active: noIs it right behavior for this processor or there is something wrong with my configuration?
It supports intel Enhanced SpeedStep but governor ondemand is not working for me .... all the time there is 2.8GHz, and without p4-clockmod it's 3GHz
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Pentium4 doesn't support frequency scaling, only clock modulation. So what you observe is totally ok.
And note that with clockmod you're not actually changing the frequency, the processor will still be at 3GHz. It just won't do stuff every cycle, meaning stuff will take longer to complete. The point of clock modulation isn't power saving, it's thermal management - the processor will modulate the clock when the temp gets critical, to prevent overheating.
More reading about that: http://codemonkey.org.uk/2009/01/18/for … 4clockmod/
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That's sad news ...
But (i forgot mention of it)
[]sudo modprobe speedstep-libLoads without any error. Unfortunately without any reason to cpu frequency scaling
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