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kubek

Member

Registered: 2016-05-20

Posts: 1

kworker 100% Core help

HI
I bought new laptop Acer Aspire V 15 Nitro and have problem with kworker. 1 core have 100% use by kworker.
What should I do?

top - 18:16:06 up  1:17,  0 users,  load average: 2.34, 2.36, 2.57
Tasks: 211 total,   2 running, 209 sleeping,   0 stopped,   0 zombie
%Cpu0  :   0.0/98.4   98[|||||||||||||||||||||||||||||||||||||||||||||||||||| ]
%Cpu1  :   1.8/12.7   15[||||||||                                             ]
%Cpu2  :   1.8/12.6   14[||||||||                                             ]
%Cpu3  :   1.7/14.3   16[|||||||||                                            ]
%Cpu4  :   0.8/4.5     5[||                                                   ]
%Cpu5  :   1.2/12.4   14[||||||||                                             ]
%Cpu6  :   1.2/12.1   13[|||||||                                              ]
%Cpu7  :   1.1/12.3   13[|||||||                                              ]
GiB Mem :  7.1/15.560   [                                                     ]
GiB Swap:  0.0/1.000    [                                                     ]

  PID USER      PR  NI    VIRT    RES  %CPU %MEM     TIME+ S COMMAND            
    1 root      20   0  113.1m   6.2m   0.0  0.0   0:01.06 S systemd            
  338 root      20   0  109.9m  52.3m   0.0  0.3   0:00.20 S  `- systemd-journ+ 
  375 root      20   0   35.8m   4.6m   0.0  0.0   0:00.86 S  `- systemd-udevd  
  729 root      20   0   89.9m   1.5m   0.0  0.0   0:00.00 S  `- lvmetad        
  892 root      20   0   27.3m   2.9m   0.0  0.0   0:00.00 S  `- bumblebeed     
  894 dbus      20   0   32.5m   3.9m   0.0  0.0   0:00.56 S  `- dbus-daemon    
  896 root      20   0   15.1m   2.4m   0.0  0.0   0:00.00 S  `- systemd-logind 
  899 root      20   0  563.8m  15.7m   0.0  0.1   0:05.29 S  `- NetworkManager 
  904 root      20   0   83.8m   6.2m   0.0  0.0   0:00.00 S  `- cupsd          
  950 root      20   0  153.8m  12.8m   0.0  0.1   0:00.23 S  `- slim 

Last edited by kubek (2016-05-20 14:17:09)

predacon

Member

Registered: 2013-10-13

Posts: 30

Re: kworker 100% Core help

same problem here. latest kernel and kde running on a skylake 6600K i5.

mpan

Member

Registered: 2012-08-01

Posts: 1,207

Website

Re: kworker 100% Core help

@kubek:
Your top output doesn’t include the offending kworker: you have used a tree mode, which doesn’t sort the results.

Next time the problem occurs, run and provide the output of:

$ ps -e -o pid,pcpu,cmd --sort=-pcpu | grep -F kworker

You may also see the stack of the offender to get insight on what the thread is related to:

# cat /proc/$PID_OF_OFFENDER/stack

Maybe this will give some insight on what’s the cause.

Last edited by mpan (2016-10-07 02:53:30)

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