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
    2019-08-17T10:02:16+00:00

    Same here.

    Only difference is that I replaced the NVIDIA graphics card by one from ATI which instantly solved any spikes from dxgkrnl.

    The new one is by far not als powerful as the old one but at last I can run my audio software again w/o any dropouts.

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  2. Anonymous
    2019-08-17T00:59:43+00:00

    Thanks Artur, I'll remember to come back here if needed in the future.

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  3. Anonymous
    2019-07-06T04:29:42+00:00

    I have found A work around for the ntoskrnl.exe latency issue.

    Moving your page file off of you system drive to a separate SSD i have achieved a complete reduction in latency spikes that result in Audio stutter in DAWs. Mind you an HHD will not work it has to be an SSD, and your system drive page file has to be disabled or multi access I/O will not function properly and will choke on system access to page file access. 

    So far i have only determined this with work with the dxgkrnl.sys Spike which is a latency spike with cause by NVIDIA graphics card hardware interrupt requests.

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  4. Anonymous
    2019-07-05T02:47:09+00:00

    Having the same issue here, unfortunately. Hoping for a quick fix, really hurting audio production!

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  5. Anonymous
    2019-07-02T20:31:19+00:00

    Are any of you seeing FPS Drops?

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