hm… I’m not sure if its working here…
Sorry, output below is in Portuguese, but as you can see, with amd_pstate=active
, I’m getting amd-pstate-epp
and powersave
.
amd_pstate=active
$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
amd-pstate-epp
$ cpu_freq_check2
analisando o CPU 5:
driver: amd-pstate-epp
CPUs que rodam na mesma frequência de hardware: 5
CPUs que precisam ter suas frequências coordenadas por software: 5
maior latência de transição: Cannot determine or is not supported.
limites do hardware: 550 MHz - 4.55 GHz
reguladores do cpufreq disponíveis: performance powersave
política de frequência atual deve estar entre 550 MHz e 4.55 GHz.
O regulador "powersave" deve decidir qual velocidade usar
dentro desse limite.
current CPU frequency: Unable to call hardware
current CPU frequency: 3.50 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: no
Now, with amd_pstated=guided
, I’m back to amd-pstate
and schedutil
? Not sure if this should be happening…
amd_pstate=guided
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
amd-pstate
$ LANG=C cpu_freq_check2
analyzing CPU 11:
driver: amd-pstate
CPUs which run at the same hardware frequency: 11
CPUs which need to have their frequency coordinated by software: 11
maximum transition latency: 20.0 us
hardware limits: 550 MHz - 4.55 GHz
available cpufreq governors: conservative ondemand userspace powersave performance schedutil
current policy: frequency should be within 550 MHz and 4.55 GHz.
The governor "schedutil" may decide which speed to use
within this range.
current CPU frequency: Unable to call hardware
current CPU frequency: 3.64 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: yes
AMD PSTATE Highest Performance: 166. Maximum Frequency: 4.55 GHz.
AMD PSTATE Nominal Performance: 124. Nominal Frequency: 3.40 GHz.
AMD PSTATE Lowest Non-linear Performance: 64. Lowest Non-linear Frequency: 1.75 GHz.
AMD PSTATE Lowest Performance: 21. Lowest Frequency: 550 MHz.
Edit: cpu_freq_check2 is an alias for cpupower frequency-info