Windows 10 v1903 - ntoskrnl.exe & ISR/DPC latency spikes

Anonymous
2019-05-31T18:33:50+00:00

Hi,

After updating to 1903 LatencyMon associates ntoskrnl.exe with large latency spikes on the order of ~1,300µs. Same results with KB4497935.

I posted here too as I thought it could be related to the GPU driver:

https://forums.geforce.com/default/topic/1120890/geforce-drivers/win10-ver-1903-ntoskrnl-exe-large-latency-spikes-/

Others are also reporting similar symptoms. E.g. in some instances this results in noticeable audio clicks/pops.

https://www.reddit.com/r/Windows10/comments/bu34xv/update_1903_high_dpc_latency_issues/

Are you seeing similar results?

Does anyone at Microsoft acknowledge this?

It should be easily reproducible.

Thanks,

Howard

SOLUTION:

KB4505903 seems to have significantly mitigated the ntoskrnl.exe latency spikes for many users.

Windows for home | Windows 10 | Performance and system failures

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  1. Anonymous
    2019-08-17T12:21:32+00:00

    Google - MSISupported to turn on Message-Signalled Interrupts for the devices.

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  2. Anonymous
    2019-07-27T22:16:20+00:00

    I get pretty consistent test results with the KB4505903 update, but not ready to install 1903 on my DAW computer...going to wait. 

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  3. Anonymous
    2019-07-27T20:52:00+00:00

    Improved but not fixed.  1903 18362.267 build.

    Test running only for 10min. without any intensive workload, just watching a video.

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  4. Anonymous
    2019-07-27T19:58:24+00:00

    Tested  on one of my comnputers that was affected and getting good results after update kb4505903.

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  5. Anonymous
    2019-07-27T16:29:59+00:00

    See this GearSlutz thread - they are working on a fix and it is in the fast-lane.

    https://www.gearslutz.com/board/showpost.php?p=14081809&postcount=238

    Terry

    Yes! Some initial tests show a significant improvement with the latest patch:

    https://support.microsoft.com/en-us/help/4505903/windows-10-update-kb4505903

    I highly recommend testing it out for confirmation.

    Cheers,

    Howie

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