topic Re: CPU frequency-scaling in Operating System - Linux

CPU frequency-scaling

'chris' — Mon, 20 Mar 2006 15:22:39 GMT

hi

howto check under linux, if my CPU does support frequency-scaling ?

kind regards
chris

Re: CPU frequency-scaling

Steven E. Protter — Mon, 20 Mar 2006 15:30:47 GMT

Shalom Chris,

I'd check the manufacturers website personally, and then maybe lookup the chip specs on Intel or AMD's website.

As far as Linux is concerned its a CPU. It gives the OS life but I don't really think there are diagnostics this advanced.

There may be add in software, but I'm pretty sure there are no tools built into the OS.

SEP

Re: CPU frequency-scaling

'chris' — Mon, 20 Mar 2006 16:45:41 GMT

my system is:

# dmesg | more

Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz (1999.95-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0xf24 Stepping = 4
Features=0x3febf9ffMCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM>

Re: CPU frequency-scaling

Ivan Ferreira — Mon, 20 Mar 2006 17:00:32 GMT

Check these links:

http://www.thinkwiki.org/wiki/How_to_make_use_of_Dynamic_Frequency_Scaling
http://epialinux.org/files/epia_howto/ar01s08.html
http://www.intel.com/cd/ids/developer/asmo-na/eng/195910.htm?page=3
http://www.cs.usfca.edu/~afedosov/thinkpad/frequency.shtml

Re: CPU frequency-scaling

dirk dierickx — Tue, 21 Mar 2006 03:47:39 GMT

the command;

$ cat /proc/acpi/processor/CPU0/info

will show, amongst others;

power management: yes
throttling control: yes