CPU frequency not the same as what should be

English Hardware
1

Hi all :slight_smile:

I’ve got OpenSUSE 11.4 running on an Intel Core i3 CPU (dual core, logic quad core, what I remember) and @2.13 GHz. Still, take a look at this :

[root@felucia:~]# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 37
model name      : Intel(R) Core(TM) i3 CPU       M 330  @ 2.13GHz
stepping        : 2
cpu MHz         : 933.000
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
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 rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips        : 4255.25
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 37
model name      : Intel(R) Core(TM) i3 CPU       M 330  @ 2.13GHz
stepping        : 2
cpu MHz         : 933.000
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 2
cpu cores       : 2                                                                                                                
apicid          : 4                                                                                                                
initial apicid  : 4                                                                                                                
fpu             : yes                                                                                                              
fpu_exception   : yes                                                                                                              
cpuid level     : 11                                                                                                               
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 rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm arat dts tpr_shadow vnmi flexpriority ept vpid                  
bogomips        : 4255.78
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 2
vendor_id       : GenuineIntel
cpu family      : 6
model           : 37
model name      : Intel(R) Core(TM) i3 CPU       M 330  @ 2.13GHz
stepping        : 2
cpu MHz         : 933.000
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 2
apicid          : 1
initial apicid  : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
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 rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips        : 4255.77
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 3
vendor_id       : GenuineIntel
cpu family      : 6
model           : 37
model name      : Intel(R) Core(TM) i3 CPU       M 330  @ 2.13GHz
stepping        : 2
cpu MHz         : 933.000
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 2
cpu cores       : 2
apicid          : 5
initial apicid  : 5
fpu             : yes
fpu_exception   : yes
cpuid level     : 11
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 rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm arat dts tpr_shadow vnmi flexpriority ept vpid
bogomips        : 4255.78
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

I already saw this on Mandriva 2010.2 but only CPUs 1 & 3 were concerned. Is it bad ? If so, how can I fix it ?..

Best regards,
[Moviuro]

2

What exactly do you think is not right with the output? As far as I understand, the cpu MHz shows the current frequency at which the cpu is running. For example, I have a AMD Phenom II X6 1055T Processor which is currently running at 800 MHz, because I am just browsing the web and posting in this forum.

3

Ah ! I see ! The /proc/cpuinfo displays the current frequency ! :slight_smile:
Ok, I thought it displayed the max frequency settings… :slight_smile:

4

No, I am pretty sure that it displays the current frequency. You can test it by running some heavy application and then monitoring the frequency. I am just not sure how often it gets updated.

5 
[transistor@felucia:~]$ cat /proc/cpuinfo | grep MHz
cpu MHz         : 2133.000
cpu MHz         : 2133.000
cpu MHz         : 2133.000
cpu MHz         : 2133.000

(compiling a kernel, listening to music & surfing on the Net…) Everything’s alright :slight_smile:

6

The /proc filesystem is a window into the kernel values so it should reflect the current state anytime.

7

Moviuro, you should consider looking at the following link to a blog on a script that can be used to set and view your CPU speed.

C.F.U. - CPU Frequency Utilitiy - Version 1.10 - For use with the cpufrequtils package - Blogs - openSUSE Forums

Thank You,