Kernel_Task Using 220% CPU??

Discussion in 'MacBook Pro' started by mesq, May 4, 2010.

  1. mesq macrumors member

    Joined:
    Jan 11, 2010
    #1
    Hi there,

    When I was using Logic on my 3 week old i5 macbook pro I noticed that it was running really slow. So i checked activity monitor and a system process called kernel_task is taking up up to 200% CPU activity.

    What's going on? I've searched alot and there doesn't seem to be an answer to this?
     
  2. realz macrumors member

    Joined:
    Apr 16, 2009
    Location:
    New York
    #2
    Do you have any devices attached...?
    Also, have you tried a reboot if it fixes the issue.

    You might wanna also check out system logs in Console.
     
  3. mesq thread starter macrumors member

    Joined:
    Jan 11, 2010
    #3
    No devices attached -

    Of course I have tried a reboot.

    I've looked in console but have no idea what is happening there?
     
  4. vant macrumors 65816

    Joined:
    Jul 1, 2009
    #4
    Overheating could be a cause. Check smcFanControl
     
  5. mesq thread starter macrumors member

    Joined:
    Jan 11, 2010
    #5
    Well it is happening straight after booting up and the mac is cool to the touch. Not even warm. But I will install SMCfancontrol and see what happens...
     
  6. vant macrumors 65816

    Joined:
    Jul 1, 2009
    #6
    Reset your PRAM/SMC.
     
  7. mesq thread starter macrumors member

    Joined:
    Jan 11, 2010
    #7
    Well Fan Control says it is 0 degrees celcius running around 6000rpm fanspeed.
     
  8. mesq thread starter macrumors member

    Joined:
    Jan 11, 2010
    #8
    Well resetting Pram has fixed it - I wonder what has caused this to happen? Could it be something I installed - because I uninstalled pretty much everything. grrr how annoying. Anyway totally glad it is fixed :) I knew this site was good for more than Waiting for arrandale :p
     
  9. mesq thread starter macrumors member

    Joined:
    Jan 11, 2010
    #9
    So The resetting pram thing was only a stop gap solution as it the problem is now back :(
     
  10. sammich macrumors 601

    sammich

    Joined:
    Sep 26, 2006
    Location:
    Sarcasmville.
    #10
    Does it say anything in Applications -> Utilities -> Console?
     
  11. vant macrumors 65816

    Joined:
    Jul 1, 2009
    #11
    I think you have a bad logic board. Sorry for the bad news.
     
  12. mesq thread starter macrumors member

    Joined:
    Jan 11, 2010
    #12
    So - deleting the login programs the problem seems to be fixed for now...
     
  13. singhjeet29 macrumors regular

    Joined:
    Oct 9, 2008
    #13
    Sorry not to be a complete noob, but I've been wondering, I've seen this before on my mac too, where certain tasks take a lot of cpu activity, and its clearly adding to more than 100%. My logical brain doesn't comprehend this. Can anyone please explain why the cpu activity goes over 100%.
     
  14. wandrer2 macrumors member

    Joined:
    Feb 9, 2010
    #14
    Multiple cores. Each one goes to 100%.

    Since the new i5/i7 have hyperthreading or whatever it's called, it looks as if there are 4 processors in those machines. Just now I was running 370% :D
     
  15. mesq thread starter macrumors member

    Joined:
    Jan 11, 2010
    #15
    Ok So Vant was right - after doing a hardware test an error has come up which Apple care said is a logic board error. My 3 week old i5 macbook pro is now at the Genius bar hopefully getting fixed promptly.
     

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