1903 ntoskrnl.exe HIGH DPC Latency!!!

Discussion in 'Windows 10' started by slayer62, May 30, 2019.

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  1. gdeliana

    gdeliana MDL Junior Member

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    #41 gdeliana, Jun 12, 2019
  2. pcnavarra

    pcnavarra MDL Senior Member

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    #42 pcnavarra, Jun 12, 2019
  3. scaramonga

    scaramonga MDL Member

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    #43 scaramonga, Jun 12, 2019
    Corrected.
     
  4. slayer62

    slayer62 MDL Junior Member

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    #44 slayer62, Jun 13, 2019 (OP)
  5. k3lt

    k3lt MDL Junior Member

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    #45 k3lt, Jun 13, 2019
    Last edited: Jun 13, 2019
  6. erpsterm35

    erpsterm35 MDL Expert

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    #46 erpsterm35, Jun 13, 2019
  7. asfx33

    asfx33 MDL Novice

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    #47 asfx33, Jul 19, 2019
    After using xperf; it seems this ntokrnl.exe DPC spikes is related to Patchguard; PatchGuard is an internal windows protection again Kernel Patch

    So try to disable Patchguard with EfiGuard (available on github)

    This is not a real solution, but a simple workaround if you have installed the 1903

    The best solution is a new "good" build of Windows for a perfect result on LatencyMon
     
  8. MS_User

    MS_User MDL Guru

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    #48 MS_User, Jul 19, 2019
    latency is one issue i never a problem with in any of my machines and i have a few all running 10.
     
  9. tavrez

    tavrez MDL Senior Member

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    #49 tavrez, Aug 27, 2019
    I heard that this bug is fixed on latest RP update, is it true?
     
  10. windows builder

    windows builder MDL Guru

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    #50 windows builder, Aug 27, 2019
    yes
     
  11. bonesz

    bonesz MDL Senior Member

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    #51 bonesz, Aug 27, 2019
    Last edited: Aug 27, 2019
  12. k3lt

    k3lt MDL Junior Member

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    #52 k3lt, Sep 15, 2019
  13. slayer62

    slayer62 MDL Junior Member

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    #53 slayer62, Sep 17, 2019 (OP)
    thats just you dawg its fixed for everyone else
     
  14. cengizhan

    cengizhan MDL Senior Member

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    #54 cengizhan, Sep 17, 2019
    ntoskrnl latency is fixed for me too. it was coming up even after 5 minutes of running. but nvidia driver (nvlddmkm.sys) is still causing big latencies. i had to run the latency monitor for a few hours to see it.
     
  15. slayer62

    slayer62 MDL Junior Member

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    #55 slayer62, Sep 17, 2019 (OP)
    nvlddmkm will always spike as u enter and minimize programs that trigger 3d clocks which are the boost clocks in nvidia cards. there is no way around this. when they change power stats dpc will spike to 350-500 for a sec then back to normal.
     
  16. BAU

    BAU MDL Addicted

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    #56 BAU, Sep 18, 2019
    You better test again after updating, because Microsoft f**ked up as always
    "fixing problems for 5% users while introducing new problems for 15% users" :rolleyes:
     
  17. cengizhan

    cengizhan MDL Senior Member

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    #57 cengizhan, Sep 18, 2019
    gpu frequency changing is possibly the reason of it. mine is about 1500. but it is not breaking the responsiveness of the system like ntoskrnl was doing. ntoskrnl bug was really there and it was really fixed. at least for me.
     
  18. slayer62

    slayer62 MDL Junior Member

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    #58 slayer62, Sep 18, 2019 (OP)
    NTOSKRNL spikes are fixed still in 356. If you are having a problem still maybe clean install 356 otherwise you have a device driver spiking the kernel. nvidia power state switches will only spike the driver associated to the video card and in this case if you are above 500us something else is going on as that is not a normal bump from a power state switch
     
  19. Samus01

    Samus01 MDL Novice

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    #59 Samus01, Oct 22, 2019
    I have a dual boot system with win 7x64 SP1 Ultimate with latest updates and Win 10 Pro x64 was fresh installed a few days ago which was the latest iso atm aka os build 18362.356 which updated to 18362.418 later and all I can say is that ntoskrnl.exe in Win 7 never gets above 100ish no matter how many times I run latencymon v6.71 while in Win 10 ntoskrnl.exe spikes up randomly once in a 20minute test run to 180ish or max 300ish, those numbers are still in the green but its still much higher compared to Win 7. But I guess thats Win 10, they dropped the QA team 5 years ago :/
     
  20. Insanegamer1996

    Insanegamer1996 MDL Junior Member

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    #60 Insanegamer1996, Oct 24, 2019
    You cant really compare windows 10 to windows 7 without tweaks/optimizations because windows 7 will obliterate 10 when it comes to input lag / fps count and so on
     
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