Hi,
This seems newish, maybe 4.16 debug kernels were doing it also, but I've seen if for all of 4.17. But what's new, I think, with 4.17.0-0.rc5.git1.1.fc29.x86_64 is I'm seeing a 4 kidle_inject threads each using around 20% CPU per top, and the everything is sluggish, the mouse arrow jerks around on screen, and apps aren't responsive.
I'm not sure where to start with troubleshooting; my first thought is to just wait for rc6 and see if it's still happening.
[ 698.266514] intel_powerclamp: Start idle injection to reduce power [ 699.234406] NOHZ: local_softirq_pending 80 [ 699.235553] NOHZ: local_softirq_pending 282 [ 699.236533] NOHZ: local_softirq_pending 282 [ 699.237543] NOHZ: local_softirq_pending 282 [ 699.238537] NOHZ: local_softirq_pending 282 [ 699.239533] NOHZ: local_softirq_pending 282 [ 699.954395] NOHZ: local_softirq_pending 01 [ 699.955375] NOHZ: local_softirq_pending 03 [ 699.956528] NOHZ: local_softirq_pending 03 [ 699.956620] NOHZ: local_softirq_pending 03 [ 770.446697] intel_powerclamp: Stop forced idle injection [ 3431.071390] intel_powerclamp: Start idle injection to reduce power [ 3499.240452] intel_powerclamp: Stop forced idle injection [ 3559.338108] intel_powerclamp: Start idle injection to reduce power [ 3603.420097] intel_powerclamp: Stop forced idle injection [ 3715.571884] intel_powerclamp: Start idle injection to reduce power [ 3755.677148] intel_powerclamp: Stop forced idle injection
Thanks,