I want to use cpufreq "ondemand" policy to change the CPU frequency dynamiclly. But when I insmod the powernow-k8 driver, it detected below data Jul 9 11:11:43 localhost kernel: powernow-k8: Found 1 AMD GX-416RA SOC (4 cpu cores) (version 2.20.00) Jul 9 11:11:43 localhost kernel: powernow-k8: 0 : pstate 0 (1600 MHz) Jul 9 11:11:43 localhost kernel: powernow-k8: 1 : pstate 1 (1600 MHz) Jul 9 11:11:43 localhost kernel: powernow-k8: 2 : pstate 2 (1600 MHz) Jul 9 11:11:43 localhost kernel: powernow-k8: 3 : pstate 3 (1600 MHz) Jul 9 11:11:43 localhost kernel: powernow-k8: 4 : pstate 4 (1600 MHz) Jul 9 11:11:43 localhost kernel: powernow-k8: 5 : pstate 5 (1600 MHz) Why the CPU frequency is fixed? is it caused by BIOS setting? Is there some methods to modify the limit in software not BIOS? Thanks
are you using acpi-cpufreq driver? plz provide following log with latest 4.4-rc1 if possible skywalker@sky-lake:/$ grep . /sys/devices/system/cpu/cpu0/cpufreq/* thank you Yu
sorry I misread your log, it is related to powernow-k8 driver.. I'm not familiar with it.. How about the result after you stress -c 4 ?
As we did not get response for quite sometime I'm closing this ticket, please feel free to reopen if you want to continue to debug on this.