High CPU when idling, app and kernel response poor
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Thread: High CPU when idling, app and kernel response poor

  1. #1
    Join Date
    Jun 2000
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    California
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    High CPU when idling, app and kernel response poor

    DV4621I
    AMD A9-9425, Radeon R5, 5 computer Cores 2C+3G
    16 RAM
    OS Version 22H2
    Build 19045.4291

    The machine took 1:45 to boot and everything was correspondingly slow. I ran WhySoSlow and CPU activity often hits 100% when the machine is doing nothing.

    So far:

    * Fixed too many hard page faults
    * Updated drivers
    * Defragged disk
    * Looked for runaway processes
    * Checked for virus and rootkits

    Also high are kernel and app responsiveness but I can't find the cause. Any suggestions?

    Thanks - rev

  2. #2
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    Idaho Falls, Idaho, USA
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    Have you checked Task Manager to see which processes are using the CPU?

    You can also try booting a live Linux disc or flash drive to see if you get the same issue. That might reveal whether it is a hardware or software issue.

  3. #3
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    Yes, I checked Task Manager for CPU and memory load but I couldn't find anything. CPU doesn't stay in the red, it's a brief peak but happens 4 or 5 times per minute and something somewhere must account for it. I'm out of my depth with other OS's. Even displaying a jpeg takes too long, I get a frame, some churning and finally the image appears.

    Maybe Noah owned this laptop or NASA used it to go to the moon... Thanks

  4. #4
    Join Date
    Feb 2000
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    Idaho Falls, Idaho, USA
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    OK, laptop. That is helpful information. Laptops can have heat issues that desktop computers usually do not suffer from. Dust and debris can clog the relatively small ventilation openings, resulting in heat issues and CPU throttling. Check for that first. Fans can fail also. Try SpeedFan or similar software to check CPU temperatures.

    Then, use Task Manager to view the CPU usage, with the highest usage processes set to be on the top of the list. Watch what happens as you perform actions. This might be easier if you can connect an external monitor so you can see the Task Manager window and whatever else you are working on.

    If the same process is using the most CPU cycles, you have your answer. If the high CPU usage cycles through various processes, then something else may be going on, possibly with hardware throttling.

    Check the S.M.A.R.T. statistics for the hard drive also, in case of retries on read/write operations. Run a memory test as well.

    As previously suggested, try a live Linux OS to see if the same thing happens there.

    Check for antimalware software using excessive CPU cycles.

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