DPC Latency - Win10 - Need help from smart people!

[vanessa]

Hello gentlemen,

I'm Vanessa,
I'm having some issues with my desktop computer running windows 10. I've always had some micro-stutter in game and audio stutter when running DAW programs to write music.
It has been bugging so much that I started to investigate, and stumbled upon this very informative post from niemiro.

So I've decided to come to you guys for some help on how to fix my - what appears to be- DCP latency issues.

I've attached below some screenshots from the Lacenty Checker, LatencyMon, and Windows Analayzer, but I'm not sure where the issue is. Maybe it's WDF Dynamic - Kernel Mode Driver Framework Runtime - Wdf01000.sys but I don't seem to find a way to update that - if I understand correctly it's not something you update, but something other drivers depend on.
Also here is my trace.etl : Dropbox - trace.etl

Is that actually my issue ? Could anyone help me diagnose correctly, and fix it for good ? You would be my angel for life :)
Thanks!!

 

[vanessa]

Anyone ? :)
Please let me know if you need additionnal information,
Any help would be soooo greatly appreciated!

 

[Xer]

Hi Vanessa,

DPC Latency is not my expertise, so please take my advice with a grain of salt, but I took a look at your trace file and noticed that CompatTelRunner.exe is kind of running amok of your system. At peak it's using about 12.5% of your CPU resources, and at many points it was using between 90-100 disk service time. You could try uninstalling updates KB2952664, and KB2977759, or you can take ownership of C:\Windows\System32\CompatTelRunner.exe and rename the file (I would recommend making a restore point first). It may just have happened to have been working when you did this capture, but your ISR/DPC times seem quite low, and it looks like it's hard pagefaults that you're having issues with.

 

[vanessa]

Thanks so much Xer!
I did what you mentioned, and renamed CompatTelRunner.exe. Unfortunataly it doesn't seem to change anything, I still have these cracking noises and issues, no matter if my sound card is plugged or not.

To further investigate, I ran more testing, as I suspected it could be the CPU. I tried with / without c-steps, hyperthreading, intel speedstep, all of this didn't change or fix the stutter and noise issues at all, I still have latency.

To help with the analysis I've ran more xperf diags (with DisablePagingExecutive key set) and with latency, stack flags enabled.
Here are the results https://www.dropbox.com/sh/k7r8rsojfatc6bd/AABzPFNt88WiXHCrVQlDwTZAa?dl=0

There is a very long one and a few others extra where I was able to reproduce the sound issue and latency as well.
Dropbox - etl

Here is what I got but I don't kno where to go from here :

I hope I can find where this issue comes from ! Any help appreciated :)

 

[vanessa]

Hello !

As an update, I reinstalled windows 10 after formatting, with just video and audio drivers, and still got issues.
I suspect it's not my sound card because even with the motherboard sound card, I get the same issue of noises and frame drops in games etc.

I'm lost