Windows 8 and 8.1 Forums


BootCKCL.etl file size & “Circular Kernel Context Logger"

  1. #1


    Posts : 3
    Windows 8 Professional 64 bit

    BootCKCL.etl file size & “Circular Kernel Context Logger"


    Hi all,

    I have a few regular / re-occurring errors in my event viewer which seem to be linked to logging upon boot and shutdown. I am running Windows 8 x64 professional.

    Event ID 4:
    The maximum file size for session "Circular Kernel Context Logger" has been reached. As a result, events might be lost (not logged) to file "C:\WINDOWS\system32\WDI\LogFiles\BootCKCL.etl". The maximum files size is currently set to 104857600 bytes.

    Event ID 3:
    Session "Circular Kernel Context Logger" stopped due to the following error: 0xC0000188

    I have tried renaming the BootCKCL.etl file and restarting, but a new one is created which is the same file size. The current file size is 102Mb. I have also edited the following which has made no difference and the error still appears:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WMI\Autologger\Circular Kernel Context Logger increasing the the value MaxFileSize to 200.


    I also see this error but I am unsure if it related:

    Custom dynamic link libraries are being loaded for every application. The system administrator should review the list of libraries to ensure they are related to trusted applications. Please visitWorking with the AppInit_DLLs registry value for more information.

    The support article didnt really provide much help.

    Is this a problem with booting / shutting down, or is it an issue with logging and the file sizes?

    Does anyone have any ideas on how to fix this? I opened up the BootCKCL.etl file in Windows Performance Analyzer, and it gave me a warning:

    Performance Analyzer noticed that 0 events and 13 buffers were lost in this trace.
    This is usually created by insufficient bandwidth for ETW logging. Please try increasing the minimum and maximum number of buffers and / or the buffer size. Doubling these values would be a good first attempt. Please note, though, that this action increases the amount of memory reserved for ETW buffers, increasing memory pressure on your scenario. See "xperf -help start" for the associated command line operations.

    Windows Performance analyzer might not be able to provide reliable data in this situation

    Would you like to continue analyzing this trace?
    Also, when I try to open Performance monitor I get this error:

    Unable to add these counters
    \Memory\Available MBytes
    \Memory\% committed bytes in use
    \Memory\cache faults/sec
    \Physical Disk(*)\% idle time
    \Physical Disk(*)\Avg. Disk Queue length
    \Network interface(*)\bytes total/sec
    Anyone know how to reset the performance counters in windows 8?

    Are all these errors with logging linked?

    I have a boot trace etl file and performance monitor logs if anyone needs to see them?

    Any help to solve these error would be much appreciated.

      My System SpecsSystem Spec

  2. #2


    Posts : 2,191
    Windows 8.1


    I have a few regular / re-occurring errors in my event viewer which seem to be linked to logging upon boot and shutdown.
    Yep! It sure seems like you have activated a permanent boot trace of sorts. So, have you been playing around with the Performance Monitoring Toolkit by chance?
      My System SpecsSystem Spec

  3. #3


    Posts : 3
    Windows 8 Professional 64 bit


    Quote Originally Posted by my2cents View Post
    I have a few regular / re-occurring errors in my event viewer which seem to be linked to logging upon boot and shutdown.
    Yep! It sure seems like you have activated a permanent boot trace of sorts. So, have you been playing around with the Performance Monitoring Toolkit by chance?
    Hi there! Thanks for the reply :-)

    Urm not that I am aware of. I did do a boot log ("Enable boot logging") with Process Monitor, but that option isn't enabled at present?
      My System SpecsSystem Spec

  4. #4


    Posts : 2,191
    Windows 8.1


    Go to Start > Run > type "msconfig" "without quotes" and verify that boot log (Boot Tab) is not enabled:

    Click image for larger version
      My System SpecsSystem Spec

  5. #5


    Posts : 3
    Windows 8 Professional 64 bit


    Quote Originally Posted by my2cents View Post
    Go to Start > Run > type "msconfig" "without quotes" and verify that boot log (Boot Tab) is not enabled:

    Click image for larger version
    Hi again, yes that option is not checked either.
      My System SpecsSystem Spec

BootCKCL.etl file size & “Circular Kernel Context Logger"
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