Windows 10: What is the normal CPU load for the system ntoskrnl?

Discus and support What is the normal CPU load for the system ntoskrnl? in Windows 10 BSOD Crashes and Debugging to solve the problem; I was randomly checking my task manager while using Chrome and I sometimes see the 'System' app changing CPU usage. It's either one of two cases: 1... Discussion in 'Windows 10 BSOD Crashes and Debugging' started by MangoandGraham, Dec 31, 2020.

  1. What is the normal CPU load for the system ntoskrnl?


    I was randomly checking my task manager while using Chrome and I sometimes see the 'System' app changing CPU usage. It's either one of two cases:

    1 The CPU was at around 7-9% upon checking and it goes down to <1% after I check Task Manager, or
    2 The CPU was around <1% upon checking and it goes up to around 9%

    After which, in all cases, it goes back to <1% usage shortly after. Is this normal? Is this just Windows doing maintenance? What is normal System CPU usage? I have done several scans with both Malwarebytes and Norton, so I do not think it is malware. Thank you.

    :)
     
    MangoandGraham, Dec 31, 2020
    #1
  2. StPeteFL Win User

    Fix ntoskrnl high cpu usage for Windows 10 Pro?

    In mid - late December 2019 I noticed a lag in starting applications after booting (or powering up) my Windows 10 desktop. Outlook, Word, Excel, and others has a noticeable delay in starting. Once I noticed this behavior I started task manager and noticed
    a process named 'System' running consistently at a CPU rate of 15 - 17%. No matter how long the system was running, even with no active applications started or idle, the CPU rate never changed for this 'System' process. I've watched task manager before and
    have never had a process 'System' running at this rate. Normally when present this 'System' process runs at around 0.2 - 0.4% CPU.

    I selected 'System' looked at properties and it is the 'ntoskrnl' process. Next, I went to Micorosoft technet and forums looking for information related to this issue. And, of course, I found a plethora of questions, discussions, etc., all involving ntoskrnl
    and high cpu utilization, some dating back to 2016. I followed the ones posting in 2019 and tried all the suggestions for fixing this issue. Uninstall this, remove that, kill items in startup, perform a clean boot, check registry and change this, etc., etc.,
    etc..

    Non of these worked. I returned the system to the current configuration I've been running for 3 years. Here is what I noticed: If I rebooted (selected 'Restart'), the system rebooted and the 'System' process aka 'ntoskrnl' process was running at 0.2 - 0.4
    CPU rate, after about 20 -30 seconds. If I 'shut down' the system to a power off state and then start the system up there is always the 'ntoskrnl' running at the high CPU rate - forever. Perform a reboot (even an immediate reboot) then 'ntoskrnl' is running
    at the normal 0.2 - 0.4% CPU rate. And there is no lag in starting Outlook or Word or Excel, or etc. The system is back to running normal performance only after a reboot.

    So why is ntoskrnl having the aberrant behavior? Please help by looking into this. This issue with ntoskrnl keeps resurfacing and Microsoft has not fixed this.

    Here is my system information- Windows 10 Pro 64 bit, 16GB RAM, Intel i7-6700T CPU, 512GB SSD, all updates current as of Jan 3 2020

    Two suspicious updates:

    1) December 10, 2019-KB4533002 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1903 and Windows Server 1903 RTM and Windows 10, version 1909 and Windows Server, version 1909

    2) December 10, 2019—KB4530684 (OS Builds 18362.535 and 18363.535)

    The ntoskrnl properties lists the following: Created Wednesday Dec 11, 2019, Location C:\Windows\System32 - this incredibly suspicious because this is the same time frame that I noticed the system behaving differently. AND it certainly suggests that one
    of these updates has corrupted the WIndows 10 Pro performance in the ntoskrnl service.
     
    StPeteFL, Dec 31, 2020
    #2
  3. SerhiyIA Win User
    'System and compressed memory' on ASUS G75VY notebook load CPU always on 16%

    thank you for your reply!

    here what I did:

    1. disabled non-microsoft services, disabled all applications in startup list

    result: after restart "system and compressed memory" still gain 17% CPU

    2. ran PC into safe mode ( just to see what happens )

    result: CPU load is 0% for "system and compressed memory"

    3. ran PC in normal mode

    result: CPU load is 0% for "system and compressed memory"

    as we can see from step 1, the problem probably is not in applications ?

    what would you suggest in this case ?

    looking forward for your answer
     
    SerhiyIA, Dec 31, 2020
    #3
  4. niconpl Win User

    What is the normal CPU load for the system ntoskrnl?

    ntoskrnl High CPU usage


    Hello Guys , im strugling for few days with this and no luck.

    ntoskrnl is constantly using 1 of cores as shown below.



    What is the normal CPU load for the system ntoskrnl? [​IMG]


    Process name is System and compressed memory, and is pointing to ntoskrnl



    What is the normal CPU load for the system ntoskrnl? [​IMG]


    Im using laptop Samsung np350v5c-s0dpl
    i7 3630qm
    8gm ram
    Intel Hd graphics 4000
    Amd Radeon 7600M
    -----------------------------------

    What's more interesting , this started after i swaped my DVD drive with HDD.. when i run only with SSD in mail slot it;s normal.
    Already try clean install but still the same.
    I can share WPT on PM
     
    niconpl, Dec 31, 2020
    #4
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What is the normal CPU load for the system ntoskrnl?

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