On 26-06-21, 09:41, Qian Cai wrote: > Another date point is that set ACPI_CPPC_CPUFREQ_FIE=n fixed the issue that any CPU could run below the lowest freq. > > schedutil: > # cat /sys/devices/system/cpu/*/cpufreq/cpuinfo_cur_freq | sort | uniq -c > 80 1000000 > 78 1400000 > 1 2010000 > 1 2800000 > > userspace: > # cat /sys/devices/system/cpu/*/cpufreq/cpuinfo_cur_freq | sort | uniq -c > 158 1000000 > 2 2000000 ACPI_CPPC_CPUFREQ_FIE can play a role with schedutil, but not with userspace governor. Userspace doesn't use the values being updated by ACPI_CPPC_CPUFREQ_FIE. So I think the CPUs may not have been idle, just for some reason. Also, now that you are able run on latest kernel (linux-next), it would be better if we can talk in terms of that only going forward. 5.4 adds more to the already unstable results :) -- viresh
