CPU scaling governor in Ubuntu 18.04 old notebook

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aledosim
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CPU scaling governor in Ubuntu 18.04 old notebook

Post by aledosim »

Hello everyone,
I've been searching web wide and here about CPU scaling governor to tune my old notebook with Lubuntu 18.04 low latency kernel. Seems to me that, or my notebook processor doesn't have various P-States, or Ubuntu 18.04 don't allow me change the CPU governor. Is this right?
Thanks for your time

Code: Select all

~$ lscpu
Arquitetura:                x86_64
Modo(s) operacional da CPU: 32-bit, 64-bit
Ordem dos bytes:            Little Endian
CPU(s):                     2
Lista de CPU(s) on-line:    0,1
Thread(s) per núcleo:       1
Núcleo(s) por soquete:      2
Soquete(s):                 1
Nó(s) de NUMA:              1
ID de fornecedor:           AuthenticAMD
Família da CPU:             15
Modelo:                     104
Nome do modelo:             AMD Athlon(tm) X2 Dual Core Processor L310
Step:                       2
CPU MHz:                    1197.051
BogoMIPS:                   2394.10
Virtualização:              AMD-V
cache de L1d:               64K
cache de L1i:               64K
cache de L2:                512K
CPU(s) de nó0 NUMA:         0,1
Opções:                     fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow rep_good nopl cpuid extd_apicid pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch vmmcall lbrv
JamesPeters
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Re: CPU scaling governor in Ubuntu 18.04 old notebook

Post by JamesPeters »

That processor doesn't seem to have that function available for it. (Based on the info I found online.) It probably runs at the maximum 1200 MHz continuously.

Also, when I did the same test on my system, these 2 lines were returned (between the "CPU MHz" line and the "BogoMIPS" line):

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CPU max MHz:           3800.0000
CPU min MHz:           800.0000
Those 2 lines are absent from your test results, which is an indicator it has no frequency scaling feature.

You can also try cpuFreqUtils to see the available governors for your system, by running the command cpufreq-info. (For each of my cores, it says "performance" and "powersave" are the available choices.)
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aledosim
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Re: CPU scaling governor in Ubuntu 18.04 old notebook

Post by aledosim »

JamesPeters wrote:That processor doesn't seem to have that function available for it. (Based on the info I found online.) It probably runs at the maximum 1200 MHz continuously.

Also, when I did the same test on my system, these 2 lines were returned (between the "CPU MHz" line and the "BogoMIPS" line):

Code: Select all

CPU max MHz:           3800.0000
CPU min MHz:           800.0000
Those 2 lines are absent from your test results, which is an indicator it has no frequency scaling feature.

You can also try cpuFreqUtils to see the available governors for your system, by running the command cpufreq-info. (For each of my cores, it says "performance" and "powersave" are the available choices.)
Hi, thanks for your answer
I've tried cpufrequtils but cpufreq-info don't show me any feedback other than maximum transition latency. So I guess I'm right about my logic. Thanks again.
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