CPU used more than 100%

Discussion in 'Installation and Configuration of Parallels Desktop' started by LukasN, Mar 14, 2017.

  1. LukasN

    LukasN Bit poster

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    Hello, my Mac is using more than 80% (sometimes 150%++) of CPU on Windows under Parallels. I guess it is not normal..tried to reinstall parallels tools as per advice on the form, got rid of the windows sharing but still at 50's...any help, thank you.
     
    LukasN, Mar 14, 2017
    #1
  2. Maria@Parallels

    Maria@Parallels Problem solver

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    8,115
    Hi, please try this KB and check.
     
    Maria@Parallels, Mar 15, 2017
    #2
  3. LukasN

    LukasN Bit poster

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    thans for your suggestion, but it really does not help. Any OTHER suggestions? I am struggling to understand why in idle mode Windows on Parallels use 89-120% of the CPU.....
     
    LukasN, Mar 15, 2017
    #3
  4. Maria@Parallels

    Maria@Parallels Problem solver

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    And could you please provide us with the screenshot of the Windows Task Manager when Activity Monitor shows more then 100% CPU of Parallels process.
     
    Maria@Parallels, Mar 15, 2017
    #4
  5. Robinh2

    Robinh2 Bit poster

    Messages:
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    net.exe stop superfetch this is main command for cpu used 100% reduced
    please try this command
     
    Robinh2, Mar 16, 2017
    #5
  6. PaulChristopher@Parallels

    PaulChristopher@Parallels Product Expert Staff Member

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    Hi @Robinh2, thanks for the suggestion. Superfetch is a service in Windows that's designed to speed up app launching by preloading certain apps based on your usage patterns. Superfetch service has been identified as a potential cause of these disk performance issues in Windows 8.X and Windows 10. However, we have some article to improve the performance without affecting CPU usage. You can follow the steps mentioned below:
    Make sure the virtual machine is in a shut down state.
    1.Go to configuration (Actions > Configure > Hardware > Advanced settings).
    2. Add the following command to Boot flags field:
    devices.hdd.fsync=3
     
    PaulChristopher@Parallels, Mar 16, 2017
    #6
  7. Maria@Parallels

    Maria@Parallels Problem solver

    Messages:
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    Hi @LukasN
    - we got your response to this forum thread as a forum admin alert.
    It looks like you responded to the forum notification by email instead of posting it back to the forum. To post messages to the forum thread, please do that on the forum directly.
    Here is a copy of your message:
    "Hi guys, this is my activity monitor. As. You can see still very high cpu usage on windows....Have no idea why.....the lowest I managed to get it to is 40% which is still in my opinion too high."
     

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    Maria@Parallels, Mar 16, 2017
    #7

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