https://bugzilla.kernel.org/show_bug.cgi?id=71841 --- Comment #2 from Chen Yu <yu.c.chen@xxxxxxxxx> --- The ignore_nice_load works on my side on 4.4-rc5, here's my testing step: with ignore_nice_load enabled 1.root@Surface-Pro-3:/sys/devices/system/cpu/cpufreq/ondemand# echo 1 > ignore_nice_load 2.spin a nice(1) task on CPU2: root@Surface-Pro-3:/sys/devices/system/cpu/cpufreq/ondemand# taskset -c 2 nice -n1 stress -c 1 -t 200 3.top result for CPU2 load: top - 03:10:58 up 25 min, 4 users, load average: 0.85, 0.44, 0.21 Tasks: 237 total, 2 running, 235 sleeping, 0 stopped, 0 zombie %Cpu0 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa %Cpu1 : 0.4 us, 0.4 sy, 0.0 ni, 99.2 id, 0.0 wa %Cpu2 : 0.0 us, 0.0 sy,100.0 ni, 0.0 id, 0.0 wa %Cpu3 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa 4. turbostat -i 10 CPU Avg_MHz %Busy Bzy_MHz TSC_MHz - 325 25.03 1300 2494 0 1 0.05 1300 2494 2 1297 100.00 1300 2494 1 1 0.05 1300 2494 3 0 0.03 1301 2494 5. wait for step 4 to finish, then spin a nice(0) task on CPU 2: root@Surface-Pro-3:/sys/devices/system/cpu/cpufreq/ondemand# taskset -c 2 stress -c 1 -t 200 6. top top - 03:14:27 up 28 min, 4 users, load average: 0.86, 0.61, 0.33 Tasks: 233 total, 2 running, 231 sleeping, 0 stopped, 0 zombie %Cpu0 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa %Cpu1 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa %Cpu2 :100.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa %Cpu3 : 0.0 us, 0.3 sy, 0.0 ni, 99.7 id, 0.0 wa 7. turbostat -i 10 CPU Avg_MHz %Busy Bzy_MHz TSC_MHz - 724 25.01 2900 2494 0 1 0.02 2842 2494 2 2892 99.98 2900 2494 1 0 0.02 2600 2494 3 1 0.02 2601 2494 -- You are receiving this mail because: You are the assignee for the bug. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
