The bug also affects me on ubuntu 18.10 with the latest kernel (Linux 4.18.0-15-generic #16pop2-Ubuntu SMP Fri Feb 22 17:07:14 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux)
I'm using DELL XPS 15 with a usb type-c hub produced by Ugreen. Here is the perf report: Samples: 43K of event 'cycles:ppp', Event count (approx.): 39008781644 Children Self Command Shared Object Symbol + 88.47% 0.00% kworker/4:2+pm [kernel.kallsyms] [k] ret_from_fork + 88.47% 0.00% kworker/4:2+pm [kernel.kallsyms] [k] kthread + 88.47% 0.01% kworker/4:2+pm [kernel.kallsyms] [k] worker_thread + 88.45% 0.07% kworker/4:2+pm [kernel.kallsyms] [k] process_one_work + 88.04% 0.02% kworker/4:2+pm [kernel.kallsyms] [k] rpm_idle + 87.94% 0.03% kworker/4:2+pm [kernel.kallsyms] [k] pm_runtime_work + 87.85% 0.04% kworker/4:2+pm [kernel.kallsyms] [k] rpm_suspend + 87.81% 0.04% kworker/4:2+pm [kernel.kallsyms] [k] __rpm_callback + 87.79% 0.01% kworker/4:2+pm [kernel.kallsyms] [k] usb_runtime_idle + 87.75% 0.01% kworker/4:2+pm [kernel.kallsyms] [k] __pm_runtime_suspend + 87.64% 0.02% kworker/4:2+pm [kernel.kallsyms] [k] rpm_callback + 87.57% 0.03% kworker/4:2+pm [kernel.kallsyms] [k] usb_runtime_suspend + 87.50% 0.03% kworker/4:2+pm [kernel.kallsyms] [k] usb_suspend_both + 85.34% 0.13% kworker/4:2+pm [kernel.kallsyms] [k] usb_control_msg + 84.75% 0.13% kworker/4:2+pm [kernel.kallsyms] [k] usb_start_wait_urb + 82.66% 0.15% kworker/4:2+pm [kernel.kallsyms] [k] usb_submit_urb + 82.42% 0.23% kworker/4:2+pm [kernel.kallsyms] [k] usb_hcd_submit_urb + 79.45% 79.23% kworker/4:2+pm [kernel.kallsyms] [k] xhci_hub_control + 75.52% 0.13% kworker/4:2+pm [kernel.kallsyms] [k] hub_suspend + 74.18% 0.03% kworker/4:2+pm [kernel.kallsyms] [k] set_port_feature + 11.83% 0.03% kworker/4:2+pm [kernel.kallsyms] [k] usb_resume_interface.isra.12 + 11.82% 0.01% kworker/4:2+pm [kernel.kallsyms] [k] hub_resume + 11.80% 0.14% kworker/4:2+pm [kernel.kallsyms] [k] hub_activate + 11.38% 0.08% kworker/4:2+pm [kernel.kallsyms] [k] hub_ext_port_status + 5.78% 0.00% ksoftirqd/4 [kernel.kallsyms] [k] ret_from_fork + 5.78% 0.00% ksoftirqd/4 [kernel.kallsyms] [k] kthread + 5.48% 0.35% ksoftirqd/4 [kernel.kallsyms] [k] smpboot_thread_fn -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1488426 Title: High CPU usage of kworker/ksoftirqd Status in HWE Next: New Status in linux package in Ubuntu: Confirmed Bug description: kworker consuming 71.5% cpu resource ksoftirqd consuming 28.9% cpu resource It leads to power consumption issue and sometimes leads to BT does not work. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1488426/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
