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[solved] cup 0 100% on 2 different usb licenses


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This is on a z420, new to me computer. It happened on one usb license that I was setting up, so to rule out unraid glitch on the usb I swapped a second one from another server. Same song.

 

The other install had no isolated cpus, so unraid was free to do what it wanted and still did the same thing (this usb I think is restricted to 1 cpu for unraid... I don't remember, it's been a long day)

 

 

top shows:

 

top - 18:22:33 up 2 min,  1 user,  load average: 0.88, 0.40, 0.15
Tasks: 182 total,   1 running,  97 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.0 us,  6.9 sy,  0.0 ni, 93.1 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem : 49451448 total, 48636772 free,   217656 used,   597020 buff/cache
KiB Swap:        0 total,        0 free,        0 used. 48235300 avail Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
    3 root      20   0       0      0      0 I  87.0  0.0   1:50.93 kworker/0:0
 5455 root      20   0   18676   2876   2404 R   0.3  0.0   0:00.03 top
    1 root      20   0    4504   1596   1500 S   0.0  0.0   0:06.64 init
    2 root      20   0       0      0      0 S   0.0  0.0   0:00.00 kthreadd
    4 root       0 -20       0      0      0 I   0.0  0.0   0:00.00 kworker/0:0H
    5 root      20   0       0      0      0 I   0.0  0.0   0:00.00 kworker/u24:0
    6 root       0 -20       0      0      0 I   0.0  0.0   0:00.00 mm_percpu_wq
    7 root      20   0       0      0      0 S   0.0  0.0   0:00.00 ksoftirqd/0
    8 root      20   0       0      0      0 I   0.0  0.0   0:00.02 rcu_sched
    9 root      20   0       0      0      0 I   0.0  0.0   0:00.00 rcu_bh
   10 root      rt   0       0      0      0 S   0.0  0.0   0:00.00 migration/0
   11 root      20   0       0      0      0 S   0.0  0.0   0:00.00 cpuhp/0
   12 root      20   0       0      0      0 S   0.0  0.0   0:00.00 cpuhp/1
   13 root      rt   0       0      0      0 S   0.0  0.0   0:00.00 migration/1
   14 root      20   0       0      0      0 S   0.0  0.0   0:00.00 ksoftirqd/1
   15 root      20   0       0      0      0 I   0.0  0.0   0:00.00 kworker/1:0
   16 root       0 -20       0      0      0 I   0.0  0.0   0:00.00 kworker/1:0H
   17 root      20   0       0      0      0 S   0.0  0.0   0:00.00 cpuhp/2
   18 root      rt   0       0      0      0 S   0.0  0.0   0:00.00 migration/2
   19 root      20   0       0      0      0 S   0.0  0.0   0:00.00 ksoftirqd/2
   20 root      20   0       0      0      0 I   0.0  0.0   0:00.00 kworker/2:0
   21 root       0 -20       0      0      0 I   0.0  0.0   0:00.00 kworker/2:0H
   22 root      20   0       0      0      0 S   0.0  0.0   0:00.00 cpuhp/3
   23 root      rt   0       0      0      0 S   0.0  0.0   0:00.00 migration/3
   24 root      20   0       0      0      0 S   0.0  0.0   0:00.00 ksoftirqd/3
   25 root      20   0       0      0      0 I   0.0  0.0   0:00.00 kworker/3:0
   26 root       0 -20       0      0      0 I   0.0  0.0   0:00.00 kworker/3:0H

 

 

not sure where to go from here. any assistance would be appreciated!

 

diagnostics-20180817-1822.zip

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I found an article about finding out why kworker is hogging a core (https://askubuntu.com/questions/33640/kworker-what-is-it-and-why-is-it-hogging-so-much-cpu)

 

it deals with initiating a backtrace using the command

 

echo l > /proc/sysrq-trigger

 

 

 

Aug 18 08:15:27 Backup login[5615]: ROOT LOGIN  on '/dev/pts/0'
Aug 18 08:16:23 Backup kernel: sysrq: SysRq : Show backtrace of all active CPUs
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 3
Aug 18 08:16:23 Backup kernel: CPU: 3 PID: 5615 Comm: bash Not tainted 4.14.49-unRAID #1
Aug 18 08:16:23 Backup kernel: Hardware name: Hewlett-Packard HP Z420 Workstation/1589, BIOS J61 v03.94 07/10/2018
Aug 18 08:16:23 Backup kernel: Call Trace:
Aug 18 08:16:23 Backup kernel: dump_stack+0x5d/0x79
Aug 18 08:16:23 Backup kernel: nmi_cpu_backtrace+0x9b/0xba
Aug 18 08:16:23 Backup kernel: ? irq_force_complete_move+0xf3/0xf3
Aug 18 08:16:23 Backup kernel: nmi_trigger_cpumask_backtrace+0x56/0xd4
Aug 18 08:16:23 Backup kernel: __handle_sysrq+0x7c/0xfc
Aug 18 08:16:23 Backup kernel: write_sysrq_trigger+0x26/0x2b
Aug 18 08:16:23 Backup kernel: proc_reg_write+0x42/0x60
Aug 18 08:16:23 Backup kernel: ? proc_reg_poll+0x55/0x55
Aug 18 08:16:23 Backup kernel: __vfs_write+0x1e/0x109
Aug 18 08:16:23 Backup kernel: ? __alloc_fd+0x95/0x14a
Aug 18 08:16:23 Backup kernel: ? set_close_on_exec+0x2b/0x5c
Aug 18 08:16:23 Backup kernel: vfs_write+0xc3/0x166
Aug 18 08:16:23 Backup kernel: SyS_write+0x48/0x81
Aug 18 08:16:23 Backup kernel: do_syscall_64+0x6d/0xfe
Aug 18 08:16:23 Backup kernel: entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Aug 18 08:16:23 Backup kernel: RIP: 0033:0x14a22b604414
Aug 18 08:16:23 Backup kernel: RSP: 002b:00007ffec3b66ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
Aug 18 08:16:23 Backup kernel: RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000014a22b604414
Aug 18 08:16:23 Backup kernel: RDX: 0000000000000002 RSI: 0000000000719408 RDI: 0000000000000001
Aug 18 08:16:23 Backup kernel: RBP: 0000000000719408 R08: 000000000000000a R09: 0000000000000000
Aug 18 08:16:23 Backup kernel: R10: 000000000000000a R11: 0000000000000246 R12: 000014a22b8dd760
Aug 18 08:16:23 Backup kernel: R13: 0000000000000002 R14: 000014a22b8d92a0 R15: 000014a22b8d8760
Aug 18 08:16:23 Backup kernel: Sending NMI from CPU 3 to CPUs 0-2,4-11:
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 9 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 0
Aug 18 08:16:23 Backup kernel: CPU: 0 PID: 1258 Comm: kworker/0:3 Not tainted 4.14.49-unRAID #1
Aug 18 08:16:23 Backup kernel: Hardware name: Hewlett-Packard HP Z420 Workstation/1589, BIOS J61 v03.94 07/10/2018
Aug 18 08:16:23 Backup kernel: Workqueue: kacpid acpi_os_execute_deferred
Aug 18 08:16:23 Backup kernel: task: ffff88040c4fb600 task.stack: ffffc90002348000
Aug 18 08:16:23 Backup kernel: RIP: 0010:acpi_ex_access_region+0x91/0x24f
Aug 18 08:16:23 Backup kernel: RSP: 0018:ffffc9000234bb50 EFLAGS: 00000202
Aug 18 08:16:23 Backup kernel: RAX: 0000000000000001 RBX: ffff88040ec420d8 RCX: 0000000000000001
Aug 18 08:16:23 Backup kernel: RDX: ffffc9000234bbc8 RSI: 0000000000000000 RDI: 00000000fffffff6
Aug 18 08:16:23 Backup kernel: RBP: ffff88040ec26dc8 R08: 0000000000000006 R09: 00000000000000ff
Aug 18 08:16:23 Backup kernel: R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
Aug 18 08:16:23 Backup kernel: R13: 0000000000000001 R14: 0000000000000001 R15: ffffc9000234bbc8
Aug 18 08:16:23 Backup kernel: FS:  0000000000000000(0000) GS:ffff88040f200000(0000) knlGS:0000000000000000
Aug 18 08:16:23 Backup kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Aug 18 08:16:23 Backup kernel: CR2: 000014b3c213ee1c CR3: 0000000004c0a005 CR4: 00000000001606f0
Aug 18 08:16:23 Backup kernel: Call Trace:
Aug 18 08:16:23 Backup kernel: ? acpi_hw_read_port+0x39/0x97
Aug 18 08:16:23 Backup kernel: acpi_ex_field_datum_io+0xf2/0x16a
Aug 18 08:16:23 Backup kernel: ? acpi_ev_address_space_dispatch+0x1e0/0x229
Aug 18 08:16:23 Backup kernel: acpi_ex_write_with_update_rule+0xb3/0xbc
Aug 18 08:16:23 Backup kernel: acpi_ex_insert_into_field+0x1ce/0x1f0
Aug 18 08:16:23 Backup kernel: ? acpi_ns_search_and_enter+0x8a/0x19c
Aug 18 08:16:23 Backup kernel: acpi_ex_field_datum_io+0xd8/0x16a
Aug 18 08:16:23 Backup kernel: acpi_ex_extract_from_field+0xd4/0x213
Aug 18 08:16:23 Backup kernel: acpi_ex_read_data_from_field+0x14b/0x176
Aug 18 08:16:23 Backup kernel: acpi_ex_resolve_node_to_value+0x17f/0x206
Aug 18 08:16:23 Backup kernel: acpi_ex_resolve_to_value+0x1f5/0x1fc
Aug 18 08:16:23 Backup kernel: acpi_ds_evaluate_name_path+0x71/0xe5
Aug 18 08:16:23 Backup kernel: acpi_ds_exec_end_op+0x86/0x3cb
Aug 18 08:16:23 Backup kernel: acpi_ps_parse_loop+0x276/0x557
Aug 18 08:16:23 Backup kernel: ? kmem_cache_alloc+0x9f/0xe8
Aug 18 08:16:23 Backup kernel: acpi_ps_parse_aml+0x8c/0x292
Aug 18 08:16:23 Backup kernel: acpi_ps_execute_method+0x146/0x17a
Aug 18 08:16:23 Backup kernel: acpi_ns_evaluate+0x1ba/0x247
Aug 18 08:16:23 Backup kernel: acpi_ev_asynch_execute_gpe_method+0x8e/0xf5
Aug 18 08:16:23 Backup kernel: acpi_os_execute_deferred+0x11/0x1b
Aug 18 08:16:23 Backup kernel: process_one_work+0x155/0x237
Aug 18 08:16:23 Backup kernel: ? rescuer_thread+0x275/0x275
Aug 18 08:16:23 Backup kernel: worker_thread+0x1d5/0x2ad
Aug 18 08:16:23 Backup kernel: kthread+0x111/0x119
Aug 18 08:16:23 Backup kernel: ? kthread_create_on_node+0x3a/0x3a
Aug 18 08:16:23 Backup kernel: ? call_usermodehelper_exec_async+0x121/0x128
Aug 18 08:16:23 Backup kernel: ret_from_fork+0x35/0x40
Aug 18 08:16:23 Backup kernel: Code: 00 84 c0 75 26 44 89 f1 48 c7 c2 5e 58 b5 81 be 6f 00 00 00 48 c7 c7 60 3e a5 81 41 be 10 30 00 00 e8 d0 33 01 00 e9 ac 01 00 00 <f6> 45 0c 04 74 25 8b 43 1c 41 8d 75 f9 40 80 e6 fd 44 0f b6 43 
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 6 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 7 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 2 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 8 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 4 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 10 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 5 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:16:23 Backup kernel: NMI backtrace for cpu 11 skipped: idling at pc 0xffffffff815dabd2

 

second one

 

Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 3
Aug 18 08:20:35 Backup kernel: CPU: 3 PID: 5615 Comm: bash Not tainted 4.14.49-unRAID #1
Aug 18 08:20:35 Backup kernel: Hardware name: Hewlett-Packard HP Z420 Workstation/1589, BIOS J61 v03.94 07/10/2018
Aug 18 08:20:35 Backup kernel: Call Trace:
Aug 18 08:20:35 Backup kernel: dump_stack+0x5d/0x79
Aug 18 08:20:35 Backup kernel: nmi_cpu_backtrace+0x9b/0xba
Aug 18 08:20:35 Backup kernel: ? irq_force_complete_move+0xf3/0xf3
Aug 18 08:20:35 Backup kernel: nmi_trigger_cpumask_backtrace+0x56/0xd4
Aug 18 08:20:35 Backup kernel: __handle_sysrq+0x7c/0xfc
Aug 18 08:20:35 Backup kernel: write_sysrq_trigger+0x26/0x2b
Aug 18 08:20:35 Backup kernel: proc_reg_write+0x42/0x60
Aug 18 08:20:35 Backup kernel: ? proc_reg_poll+0x55/0x55
Aug 18 08:20:35 Backup kernel: __vfs_write+0x1e/0x109
Aug 18 08:20:35 Backup kernel: ? __alloc_fd+0x95/0x14a
Aug 18 08:20:35 Backup kernel: ? set_close_on_exec+0x2b/0x5c
Aug 18 08:20:35 Backup kernel: vfs_write+0xc3/0x166
Aug 18 08:20:35 Backup kernel: SyS_write+0x48/0x81
Aug 18 08:20:35 Backup kernel: do_syscall_64+0x6d/0xfe
Aug 18 08:20:35 Backup kernel: entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Aug 18 08:20:35 Backup kernel: RIP: 0033:0x14a22b604414
Aug 18 08:20:35 Backup kernel: RSP: 002b:00007ffec3b66ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
Aug 18 08:20:35 Backup kernel: RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000014a22b604414
Aug 18 08:20:35 Backup kernel: RDX: 0000000000000002 RSI: 0000000000719408 RDI: 0000000000000001
Aug 18 08:20:35 Backup kernel: RBP: 0000000000719408 R08: 000000000000000a R09: 0000000000000000
Aug 18 08:20:35 Backup kernel: R10: 000000000000000a R11: 0000000000000246 R12: 000014a22b8dd760
Aug 18 08:20:35 Backup kernel: R13: 0000000000000002 R14: 000014a22b8d92a0 R15: 000014a22b8d8760
Aug 18 08:20:35 Backup kernel: Sending NMI from CPU 3 to CPUs 0-2,4-11:
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 9 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 10 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 4 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 0
Aug 18 08:20:35 Backup kernel: CPU: 0 PID: 1258 Comm: kworker/0:3 Not tainted 4.14.49-unRAID #1
Aug 18 08:20:35 Backup kernel: Hardware name: Hewlett-Packard HP Z420 Workstation/1589, BIOS J61 v03.94 07/10/2018
Aug 18 08:20:35 Backup kernel: Workqueue: kacpi_notify acpi_os_execute_deferred
Aug 18 08:20:35 Backup kernel: task: ffff88040c4fb600 task.stack: ffffc90002348000
Aug 18 08:20:35 Backup kernel: RIP: 0010:pci_conf1_read+0xa6/0xcc
Aug 18 08:20:35 Backup kernel: RSP: 0018:ffffc9000234bdc8 EFLAGS: 00000046
Aug 18 08:20:35 Backup kernel: RAX: 0000000080080008 RBX: 0000000000000000 RCX: 0000000000000044
Aug 18 08:20:35 Backup kernel: RDX: 0000000000000cfc RSI: 0000000000000206 RDI: ffffffff82027e50
Aug 18 08:20:35 Backup kernel: RBP: 0000000000000000 R08: 0000000000000002 R09: ffffc9000234bdfc
Aug 18 08:20:35 Backup kernel: R10: 0000000000000000 R11: ffff880408d417d0 R12: 0000000000080000
Aug 18 08:20:35 Backup kernel: R13: ffffc9000234bdfc R14: 0000000000000002 R15: 0000000000000000
Aug 18 08:20:35 Backup kernel: FS:  0000000000000000(0000) GS:ffff88040f200000(0000) knlGS:0000000000000000
Aug 18 08:20:35 Backup kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Aug 18 08:20:35 Backup kernel: CR2: 000014b3c213ee1c CR3: 0000000004c0a005 CR4: 00000000001606f0
Aug 18 08:20:35 Backup kernel: Call Trace:
Aug 18 08:20:35 Backup kernel: pci_bus_read_config_word+0x32/0x3c
Aug 18 08:20:35 Backup kernel: pci_check_pme_status+0x25/0x57
Aug 18 08:20:35 Backup kernel: ? pci_check_pme_status+0x57/0x57
Aug 18 08:20:35 Backup kernel: pci_pme_wakeup+0x24/0x4f
Aug 18 08:20:35 Backup kernel: pci_walk_bus+0x76/0x7c
Aug 18 08:20:35 Backup kernel: acpi_pm_notify_handler+0x56/0x6e
Aug 18 08:20:35 Backup kernel: acpi_ev_notify_dispatch+0x40/0x55
Aug 18 08:20:35 Backup kernel: acpi_os_execute_deferred+0x11/0x1b
Aug 18 08:20:35 Backup kernel: process_one_work+0x155/0x237
Aug 18 08:20:35 Backup kernel: ? rescuer_thread+0x275/0x275
Aug 18 08:20:35 Backup kernel: worker_thread+0x1d5/0x2ad
Aug 18 08:20:35 Backup kernel: kthread+0x111/0x119
Aug 18 08:20:35 Backup kernel: ? kthread_create_on_node+0x3a/0x3a
Aug 18 08:20:35 Backup kernel: ? call_usermodehelper_exec_async+0x121/0x128
Aug 18 08:20:35 Backup kernel: ret_from_fork+0x35/0x40
Aug 18 08:20:35 Backup kernel: Code: 41 83 fe 02 74 1a 41 83 fe 04 74 24 41 ff ce 75 29 83 e3 03 8d 93 fc 0c 00 00 ec 0f b6 c0 eb 16 83 e3 02 8d 93 fc 0c 00 00 66 ed <0f> b7 c0 eb 06 ba fc 0c 00 00 ed 41 89 45 00 48 c7 c7 50 7e 02 
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 6 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 7 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 2 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 8 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 5 skipped: idling at pc 0xffffffff815dabd2
Aug 18 08:20:35 Backup kernel: NMI backtrace for cpu 11 skipped: idling at pc 0xffffffff815dabd2

 

 

so does this indicate an acpi issue?

 

I added acpi=off to syslinux.cfg and the issue has disappeared. Anyone know of a better way to resolve "properly"? IOMMU is disabled with it off.

 

Changed the above to acpi=force and iommu came back.

 

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