[SOLVED] DPC Latency Issue when gaming (cracking audio) dxgkrnl.sys & storport & usbport

Wybrem · Nov 9, 2015

DPC Latency Issue when gaming (cracking audio) dxgkrnl.sys & storport & usbport

Hello,

I'm hearing cracking sounds while gaming, I did some investigation and got a LOT of info from older posts on this very forum, so thank you all for that.
I found that dxgkrnl.sys has 15ms lag, stoport.sys about 3ms, and usbport about 1ms. Here some screenshots:
Yellow is on idle, Yellow + Red while gaming:
View attachment 17455

Here with latencyMon:
View attachment 17456 View attachment 17457

My computer specs:
Fresh Install of Windows 8.1
CPU: AMD FX-9590 @ 4.72GHz
GPU: 2x AMD MSI R9 390 8G (crossfire)
RAM: 32GB DDR3 2400Mhz
PSU: 1000W CoolerMaster Gold
Mobo: Asus Crosshair Formula-Z
Storage: SSD 850 Evo Samsung, about 6TB mass HDD storage.

What I've done so far:
Updated BIOS,
Updated audio drivers,
Updated AHCI drivers / sata drivers,
Reinstalled GPU drivers (removed with DDU),
Ran Windows Performance Analyzer (reports same as LatencyMon),

I'm a noob with this kind of problem, and I'm stuck now, is there any expert here willing to help me here.

Wybrem · Nov 9, 2015

Re: DPC Latency Issue when gaming (cracking audio) dxgkrnl.sys & storport & usbport

I don't know where the "edit" button went, but anyway here a screenshot of latencymon without gaming for a while:

Wybrem · Nov 10, 2015

Re: DPC Latency Issue when gaming (cracking audio) dxgkrnl.sys & storport & usbport

TomasD said:
Dear,

To properly troubleshoot issues with high/frequent DPCs/IRPs, we require a XPERF trace. Please follow these steps to generate one:

Download Windows Software Development Kit (SDK) for Windows and run the setup.

Select Windows Performance Toolkit feature (all the others can be unchecked) and proceed with the download/installation.

Once the installation finishes, open an elevated Command Prompt by right-clicking on CMD.EXE shortcut in your start menu and selecting Run As Administrator from the context menu.

Type the following command, which will start tracing, in the Command Prompt window you just opened:

Code:

xperf -on PROC_THREAD+LOADER+PROFILE+INTERRUPT+DPC+DRIVERS+POWER+IDLE_STATES -stackwalk Profile -BufferSize 1024 -MinBuffers 256 -MaxBuffers 256 -MaxFile 256 -FileMode Circular

Perform some activities with your computer for few minutes, making sure the issues you reported are reproduced.

Run the following command, which will stop the tracing, in the command prompt window you already have opened:

Code:

xperf -stop -d C:\CPU.etl

Compress file C:\CPU.etl

Upload the compressed file to a file sharing service (e.g. OneDrive or DropBox).

Share the download link here.

Thank you.

Hate to triple post, but the edit button has vanished again; here is my CPU.etl file, http://puu.sh/lgnc0/d7ba03d0ef.rar

Wybrem · Nov 11, 2015

Re: DPC Latency Issue when gaming (cracking audio) dxgkrnl.sys & storport & usbport

I've found the causes. Direct X issues is caused by AMD crossfire AND vsync on in games. The other lagg was caused by the 2400mhz ram, it's gone when downclocked to 1333, 1600, 1866. AMD stated that this is known with their fx builds. How great AMD is ha?

blueelvis · Nov 12, 2015

Re: DPC Latency Issue when gaming (cracking audio) dxgkrnl.sys & storport & usbport

I checked the ETL file and I saw spikes in the ASUS Com Service. Have you tried uninstalling it?

This is why I don't prefer AMD. Too many errors. NVIDIA is a lot stable as compared to AMD.

-Pranav

Wybrem · Nov 12, 2015

Re: DPC Latency Issue when gaming (cracking audio) dxgkrnl.sys & storport & usbport

blueelvis said:
I checked the ETL file and I saw spikes in the ASUS Com Service. Have you tried uninstalling it?

This is why I don't prefer AMD. Too many errors. NVIDIA is a lot stable as compared to AMD.

-Pranav

Thanks, I don't really know how to uninstall that as it doesn't show up in the control panel. This is my last red build as well. I'm done with AMD, and Asus. MSI, intel and nvidia it is next time.

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[SOLVED] DPC Latency Issue when gaming (cracking audio) dxgkrnl.sys & storport & usbport

Wybrem

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blueelvis

BSOD Kernel Dump Senior Analyst

Wybrem

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