High CPU load all of sudden

[i.k]

I just made an "update" to my PC by installing hole Centos 7 packet again.

The systems works awhile after restarts but all of sudden the system got frozen because the CPU load gets high.

Can you say based on the perf report (perf record -g -a sleep 10) what is causing this?



+ 52.64% 0.00% kworker/u8:3 [kernel.kallsyms] [k] ret_from_fork_nospec_end
+ 52.64% 0.00% kworker/u8:3 [kernel.kallsyms] [k] kthread
+ 52.64% 0.00% kworker/u8:3 [kernel.kallsyms] [k] worker_thread
+ 52.64% 0.00% kworker/u8:3 [kernel.kallsyms] [k] process_one_work
+ 52.64% 0.00% kworker/u8:3 [nouveau] [k] nv50_disp_atomic_commit_work
+ 52.64% 0.00% kworker/u8:3 [nouveau] [k] nv50_disp_atomic_commit_tail
+ 52.64% 0.00% kworker/u8:3 [nouveau] [k] nv50_wndw_wait_armed
+ 52.59% 0.13% kworker/u8:3 [nouveau] [k] base507c_ntfy_wait_begun
- 44.94% 44.94% kworker/u8:3 [kernel.kallsyms] [k] ioread32
ret_from_fork_nospec_end
kthread
worker_thread
process_one_work
nv50_disp_atomic_commit_work
nv50_disp_atomic_commit_tail
nv50_wndw_wait_armed
- base507c_ntfy_wait_begun
- 30.80% nvif_device_time
nvif_object_mthd
nvif_object_ioctl
nvkm_client_ioctl
nvkm_ioctl
nvkm_ioctl_mthd
nvkm_object_mthd
nvkm_udevice_mthd
- nvkm_timer_read
30.79% ioread32
14.14% ioread32
+ 44.44% 0.00% swapper [kernel.kallsyms] [k] start_cpu
+ 44.19% 0.46% swapper [kernel.kallsyms] [k] cpu_startup_entry
+ 38.90% 0.00% swapper [kernel.kallsyms] [k] start_secondary
+ 35.62% 0.05% swapper [kernel.kallsyms] [k] arch_cpu_idle
+ 35.48% 0.18% swapper [kernel.kallsyms] [k] cpuidle_idle_call
+ 33.80% 0.14% swapper [kernel.kallsyms] [k] cpuidle_enter_state
+ 32.35% 0.08% kworker/u8:3 [nouveau] [k] nvif_device_time
+ 32.09% 0.18% kworker/u8:3 [nouveau] [k] nvif_object_mthd
+ 31.86% 0.08% kworker/u8:3 [nouveau] [k] nvif_object_ioctl
+ 31.85% 0.10% kworker/u8:3 [nouveau] [k] nvkm_client_ioctl
+ 31.75% 0.22% kworker/u8:3 [nouveau] [k] nvkm_ioctl
+ 31.29% 0.07% kworker/u8:3 [nouveau] [k] nvkm_ioctl_mthd
+ 31.19% 0.02% kworker/u8:3 [nouveau] [k] nvkm_object_mthd
+ 31.19% 0.17% kworker/u8:3 [nouveau] [k] nvkm_udevice_mthd
+ 30.98% 0.04% kworker/u8:3 [nouveau] [k] nvkm_timer_read
+ 25.43% 24.64% swapper [kernel.kallsyms] [k] poll_idle
+ 6.77% 0.12% swapper [kernel.kallsyms] [k] apic_timer_interrupt

[jiggersplat]

Subscribed. I am having the exact same issue. My system seems fine mostly. It will happen at random (as far as I can tell) sometimes, or if I try and put in a CD, it sets it off. perf report looks more or less the same.