DPC latency from Storport.sys

thebobzer · Jan 9, 2016

Hi,

Since the installation of windows 10 I'm having massive lag spikes. The lag will mess up video and audio.

These are screenshots of LatencyMon:

This is the ETL file https://www.dropbox.com/s/0zb0xo4npyrnbrh/CPU.rar?dl=0

I hope someone can help me fix this.

xilolee · Jan 10, 2016

Hi thebobzer. :welcome:
Where did you get that cpu.etl?
I can't see much in it...

Download and install the Windows Performance Toolkit on dev.windows.com - Windows Software Development Kit (SDK) for Windows 10 - sdksetup.exe 1.12MB (click):

Read More:

Then open an elevated command prompt (right-click on the windows start button on bottom-left corner, left-click Command Prompt (Admin)) and launch these commands:

Read More:

You can also read the original tutorial/guide and its following posts for more informations:
How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8) (click) (by Niemiro)

thebobzer · Jan 10, 2016

Hello xilolee,

Thank you for your time and your in-depth response. I got that CPU.etl by following the steps reproduced in this thread:

Read More:

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

If you see a yellow warning "xperf: warning: This system is not fully configured for x64 stack tracing" after running the above command, please complete these extra steps (otherwise, proceed to the step #5):

Read More:

Run the following command which will stop the tracing:

Code:

xperf -stop

Run the following command to enable stack tracing (by disabling Paging Executive):

Code:

REG ADD "HKLM\System\CurrentControlSet\Control\Session Manager\Memory Management" -v DisablePagingExecutive -d 0x1 -t REG_DWORD -f

Reboot the computer

Once computer reboots, proceed from the step #3

If you see a red error "xperf: error: NT Kernel Logger: A device attached to the system is not functioning. (0x1f)" after running the above command, please complete these extra steps (otherwise, proceed to the step #5):

Read More:

Run the following command to disable Driver Verifier, which causes the above error:

Code:

verifier /reset

Reboot the computer

Once computer reboots, proceed from the step #3

If you see a red error "xperf: error: NT Kernel Logger: Cannot create a file when that file already exists. (0xb7)", please do the following (otherwise, proceed to the step #5):

Read More:

Make sure you do not have any programs that capture ETW data already running. Some examples of these are:

Process Explorer

Process Hacker

Resource Monitor

Process Monitor

Latency Monitor

Another instance of XPERF or WPR

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.

When i try to generate a new CPU.etl file I get stuck on number 2. I get the following message:

*edit* the translation: can't make a file that's already existing.

Thanks again for looking into my case

xilolee · Jan 10, 2016

The SDK you see in TomasD's post is for windows 8/8.1.
My suggestion is to uninstall it and install the new one of Win10.
This is not mandatory, but if you are using Win10, why should you install old tools (when there are new ones)?

By the way, about that error you are getting, could it be you didn't stop the tracing (maybe that could explain for/why the trace was incomplete)?

thebobzer · Jan 10, 2016

Hi,

When I installed the tool, I didn't install the tool for windows 8/8.1, but the one for windows 10.

I think the trace did stop. I just followed all the commands and it produced the file..

xilolee · Jan 10, 2016

Good!
I see you have got a more updated version than mine, maybe it is me that should change the version!

It seems you installed everything; it would have sufficed to install only the Windows Performance Toolkit.
However, re-try to generate a new trace.

thebobzer · Jan 11, 2016

Hi,

I generated a new trace. https://www.dropbox.com/s/aj12dmt1nyyrg0l/Desktop.rar?dl=0
I hope this one works

xilolee · Jan 12, 2016

Let's try updating the audio driver (if you haven't already updated it).
Go to device manager, sound, video and game controllers, right-click on your sound card(s), click update driver software, click search automatically for updated driver software.
If it won't find it, check for audio driver of your PC model on the manufacturer website.
If you can't find it, and you are using Xonar Essence STX (like it seems from the trace), check:

Code:

ASUS Xonar Essence STX driver for Windows 10 x64 Version 8.1.8.1823

https://www.asus.com/Essence-Hi-Fi-Audio/Xonar_Essence_STX/HelpDesk_Download

I've also seen a bunch of conhost.exe and bztrans64_thread01.exe <---> bztrans64_thread09.exe.
That is something I didn't like to see, but it could be normal if you are using Backblaze Unlimited Backup (?).

thebobzer · Jan 12, 2016

Hi,

Thank you so much for your advice. I installed the latest update for my ASUS sound card when I installed windows 10 about a week ago. I tried reinstalling it, but that didn't seem to help.
I am using Backblaze Unlimited Backup to backup my files. I hope that program isn't an issue.

thebobzer · Jan 15, 2016

Can someone help me with this problem?

xilolee · Jan 15, 2016

USB.dll is another module in the first hits.
What USB devices are you using?

Additional informations could be useful; for example:

System information log (run it from an elevated command prompt):
Code:
```
msinfo32 /nfo %desktop%\MsInfo.nfo
```
Retrieve System Information, using speccy
1. Download Speccy portable - actual version 1.29.714 (click), unzip/decompress it and put it on your desktop.
2. When the program opens, it will retrieve some information regarding your system.
3. Once it's done, select the File menu and choose Publish snapshot. Answer Yes to the confirmation message.
4. On the next screen that comes up, choose the Copy to Clipboard button and paste this link in your next reply.

xilolee · Jan 15, 2016

Sorry, the command for System information is:

Code:

msinfo32 /nfo %userprofile%\desktop\MsInfo.nfo

(I created the %desktop% variable to speed up the typing on the keyboard

).

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DPC latency from Storport.sys

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