Windows 10: Windows 10 20h2 and higher (including windows 11) causing huge DPC latency spike into 27ms...

Discus and support Windows 10 20h2 and higher (including windows 11) causing huge DPC latency spike into 27ms... in Windows 10 Ask Insider to solve the problem; Ever since I got my new RX 6900xt, I've been experiencing extremely high DPC latency issues when using my second screen and displaying animations. The... Discussion in 'Windows 10 Ask Insider' started by /u/factorem_nihil, Nov 13, 2021.

  1. Windows 10 20h2 and higher (including windows 11) causing huge DPC latency spike into 27ms...


    Ever since I got my new RX 6900xt, I've been experiencing extremely high DPC latency issues when using my second screen and displaying animations. The only workaround which I found was to disconnect or not display content on my second screen, which defeats the purpose of having a dual screen setup. I tried everything from a clean install of windows 10 and 11, different drivers, new ram, disabling any OCs, selectively disabling devices in bios and device manager, clean boot and more, but nothing solved my issue (I didnt mess with HPET since it looks more like snake oil). Also only directX games where affected, vulkan games like doom eternal, rage 2, wolfenstein youngblood and even some openGL games like Doom 3 BFG edition ran just fine with content being displayed on my second screen.

    I finally decided to start rolling back windows builds, in order to figure out if the newest windows builds where the cause of my issue. Finally after installing the build 1909 the issue was gone. DirectX games that suffered from random DPC latency spikes in the 27ms range were now running fine. I tried updating to 20h2 but this caused the DPC latency issue to return.

    It seems that I will be staying on 1909 for the foreseeable future, even thought its end of life, until this issue is fixed. I dont know if this issue is caused by my GPU, since it only started after I got my 6900xt. But since others are suffering from the same issue, I expect this to be more of an AMD / Microsoft driver issue, especially a Microsoft one since its caused by the dxgkrnl.sys driver.

    Edit: Here is a google drive 7zip folder with screen recordings displaying the behaviour and some logfiles.

    Edit2: Where can I report this bug?

    submitted by /u/factorem_nihil
    [link] [comments]

    :)
     
    /u/factorem_nihil, Nov 13, 2021
    #1
  2. zinou Win User

    Huge ntoskrnl DPC latency spikes on video playback [Windows 10 1909]

    There are other events that need to be recorded in addition to DPCs. Take a trace with those options checked;


    Windows 10 20h2 and higher (including windows 11) causing huge DPC latency spike into 27ms... [​IMG]


    Windows 10 20h2 and higher (including windows 11) causing huge DPC latency spike into 27ms... [​IMG]
     
    zinou, Nov 13, 2021
    #2
  3. lbs_925 Win User
    Windows 10 v1903 - ntoskrnl.exe & ISR/DPC latency spikes

    Unfortunately I do not have a solution, but can report that I have the exact same problem with DPC latency spikes caused by ntoskrnl.exe after upgrading to 1903. All drivers and BIOS are up to date (even reinstalled to see if this would help, but did not).
    Will be rolling back.
     
    lbs_925, Nov 13, 2021
    #3
  4. Windows 10 20h2 and higher (including windows 11) causing huge DPC latency spike into 27ms...

    High DPC LATENCY caused by ACPI.SYS

    Hello,

    I write this message on this forum because I just bought a Dell VOSTRO 5481 pc that I mainly use for music production.

    The problem is that I am experiencing big problems with DPC latency caused by the ACPI.SYS and NTOSKRNL.EXE drivers.

    I use LatencyMON and DPC Latency Checker software to control latency and I have latency spikes of up to 7 to 8 ms.


    Windows 10 20h2 and higher (including windows 11) causing huge DPC latency spike into 27ms... adf3db17-b5b7-498a-9fe2-0bfca37bd157?upload=true.png


    These peaks cause cracking and interruptions during audio playback.

    I updated Windows to the latest version 1903 and also all the drivers and the bios but the problem persist.

    Do you know how I can solve this problem?

    thank you for your help
     
    maxime35000, Nov 13, 2021
    #4
Thema:

Windows 10 20h2 and higher (including windows 11) causing huge DPC latency spike into 27ms...

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