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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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  1. Anonymous
    2019-05-31T18:47:14+00:00

    Hi Howard

    My name is Andre Da Costa; an Independent Consultant, Windows Insider MVP and Windows & Devices for IT MVP. I'm here to help you with your problem.

    What is the exact make and model?

    Open Start, type: system information

    Hit Enter

    Click System summary

    Look in the right pane

    Copy the system sku info into reply here.

    See example: https://imgur.com/qzektpA

    I would also recommend you file a bug report; send me the short link so I can vote on it and bring it to the attention of the Windows engineers.

    https://windows10.help/blogs/entry/54-how-to-su...

    Information in the above link is sourced from a trusted Microsoft MVP blog.

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  2. Anonymous
    2019-05-31T23:14:12+00:00

    Hi Andre,

    Firstly, thanks for looking into this.

    I built my own desktop PC so there is no specific make/model and I've done many things to ensure it's pretty-well-optimized.

    Here's some info (certain details removed for privacy/security):

    http://s000.tinyupload.com/index.php?file_id=04200761277102733688

    I uninstalled Feedback Hub but will install it again later and will provide a link to the bug report.

    Let me know if you have any questions.

    Thanks,

    Howard

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  3. Anonymous
    2019-06-01T04:32:35+00:00

    I see some important updates for this model i RECOMMEND YOU APPLY.

    BIOS Update May 2019

    https://dlcdnets.asus.com/pub/ASUS/mb/LGA1151/R...

    Chipset drivers April 2019

    https://dlcdnets.asus.com/pub/ASUS/mb/03CHIPSET...

    LAN Driver April 2019

    https://dlcdnets.asus.com/pub/ASUS/mb/04LAN/LAN...

    Audio Driver April 2019

    https://dlcdnets.asus.com/pub/ASUS/mb/01AUDIO/A...

    See if these updates improve stability.

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  4. Anonymous
    2019-06-01T04:59:38+00:00

    As requested, here's a link to the Feedback Hub submission:

    https://aka.ms/AA5887o

    There wasn't a good category to use so I selected Devices and Drivers -> All other issues.

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  5. Anonymous
    2019-06-01T05:03:18+00:00

    Thats ok Howard, thanks for your help, will vote on it.

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