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

Hello, over the past 4 months I've been having issues with DPC latency spikes and interrupts to process latency.
My PC specs are as follows:
Asus X570 Tuf [latest BIOS]
Ryzen 3700X
2x8GB Crucial Ballistix LT 3200mhz
GTX 970 [Using Nvidia 425.31 driver as it seems the most stable]
EVGA G2 750W
500GB SSD
5TB HDD.
Windows 10 64bit 1909 [10.0.18363]

They used to be a lot worse, but seem to have calmed down until my PC has been on for a while and I try to play a video though VLC and MPC-HC. Generally they are in check but after running teamspeak and having a YouTube stream in the background, I get huge spikes to 20,000 when trying to play video. Curiously, these go away after I've opened MPC-HC and begin to play the video. Unless I tab out and tab back into full screen video, then I get a big spike again.

So far I have tried:
Replacing my motherboard (for the same model again)
Fresh installing Windows (on a different SSD)
Updating my LAN and Audio drivers
Disabling HPET in Windows (My motherboard doesn't support disabling it in BIOS)
Uninstalling Bitdefender
Using Intelligent Standby Cleaner List
Using MSI tool to set my GPU drivers to MSI mode
Only running boot drive.

I think the issue becomes worse as I upgrade my GPU driver, it's very strange as I have no issues for around 3 hours but past that point (after running Teamspeak it seems) I get huge spikes.

My GPU isn't overclocked, I have tried multiple versions of Teamspeak.
When I run a Windows Analysis all I get are huge ntoskrnl.exe spikes, and when I expand them I get various details like "KiSystemServiceCopyEnd". Which isn't really helpful to me as I'm not particularly knowledgeable in this.

Here is a link to my .etl file, for some reason the upload function of the forum isn't working for me:
Just a moment...


Any help would be really appreciated, I'm absolutely tearing my hair out at this point.

Thank you very much.

:)

 

Very high DPC latency on Win10 in ndis.sys

Thanks for looking into this. I have already tried reinstalling network and audio drivers, but I will do that again. MPC utilizing a lot of CPU power is normal as I am using SVP (smooth video project) for playback. It's also the easiest way for me to get
those spikes in ndis.sys DPC latency as I can immediately tell when it happens from the audio and video stutter.

The spikes will happen even when I have just booted up the system, it will just take longer to catch it. Is there anything else you could suggest? Perhaps catching the issue with WPR after a fresh boot would help pinpoint the issue?

 

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.

 

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

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/...-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.

Update 1903 high DPC Latency issues : Windows10

Are you seeing similar results?

Does anyone at Microsoft acknowledge this?

It should be
easily reproducible.

Thanks,

Howard