Arch Linux

Greycloack

Member

Registered: 2004-03-05

Posts: 166

checking my current cpu frequency

Hello,

It seems kernel 2.6.10 did some good things to my computer so I decided to check if the speedstepping works.

I'm working on a gateway200x
I have acpi in my modules and acpid in my deamons.

The problem is I can't check my current CPU freq. If I power the computer while it's connectec to AC and I check the cpu MHZ in /proc/cpuinfo I see my 14000. If I turn it on while it's on battery I see 6000.
Which is what I want.
But if I plug/unplug it during work /proc/cpuinfo stays the same. Is there a correct way to check the current frequency?

Thank you
Grey

phrakture

Arch Overlord

From: behind you

Registered: 2003-10-29

Posts: 7,879

Website

Re: checking my current cpu frequency

try the /sys filesystem.... i believe it'd be /sys/cpu0/something

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kth5

Member

Registered: 2004-04-29

Posts: 657

Website

Re: checking my current cpu frequency

cat /proc/cpuinfo only displays specs i think, not the real temporary values.

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cjdj

Member

From: Perth, Western Australia

Registered: 2004-05-07

Posts: 121

Re: checking my current cpu frequency

You probably want to check the values that are in /proc/acpi instead.

LB06

Member

From: The Netherlands

Registered: 2003-10-29

Posts: 435

Re: checking my current cpu frequency

cat /proc/cpuinfo only displays specs i think, not the real temporary values.

They are.

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 13
model name      : Intel(R) Pentium(R) M processor 1.50GHz
stepping        : 6
cpu MHz         : 642.528
cache size      : 64 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe tm2 est
bogomips        : 1274.44

Victor

Member

From: Zaragoza/ESPAÑA (Spain)

Registered: 2005-01-27

Posts: 23

Re: checking my current cpu frequency

You must look inside this directory:
/sys/devices/system/cpu/cpu0/cpufreq/

You will find your current frequency, the scaling governor, the avaliable governors...

As root write:

cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq

to see the CPU frequency.

  LB06: I don't know if it is normal to have only 64KB of cache memory. I think centrino has at least 1024 KB.

(Sorry for my English)

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Michiel

Member

From: Westkapelle, Zeeland, NL

Registered: 2005-02-13

Posts: 34

Website

Re: checking my current cpu frequency

i think you need a BIOS upgrade (for the cache thingy =])

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All you got to do, is tell the story right...

jaawood

Member

From: Chicago, IL

Registered: 2005-01-30

Posts: 31

Re: checking my current cpu frequency

You must look inside this directory:
/sys/devices/system/cpu/cpu0/cpufreq/

You will find your current frequency, the scaling governor, the avaliable governors...

As root write:

cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq

to see the CPU frequency.

  LB06: I don't know if it is normal to have only 64KB of cache memory. I think centrino has at least 1024 KB.

(Sorry for my English)

This could be because it is only reading the L1 cache, and not the L2, I am not sure though.