Video STUTTERING, Audio CRACKS/POPS and dpc/isr LATENCY (posting instructions)

xilolee · Aug 5, 2017

Co-author and topic starter: Admin writhziden

Please use the Windows Performance Analyzer (WPA) to provide us with your trace file.
The trace file will probably be too large to upload here, so host it from a third party site like Dropbox or Microsoft OneDrive.
You can check the original tutorial for Windows 7: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8) (click).
By the way, very similar steps can be used with the Windows 10 (and they are explained, with pictures, in following steps, at points E and F).

Please provide answers for (answer the best that you can):
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- System Manufacturer?
- Laptop or Desktop?
- Exact model number (if laptop, check label on bottom)
- OS ? (Windows 10, 8.1, 8, 7, Vista)
- x86 (32bit) or x64 (64bit)?
- Service pack?
- What was original installed OS on system?
- Is the OS an OEM version (came pre-installed on system) or full retail version (YOU purchased it from retailer)?
- Age of system? (hardware)
- Age of OS installation?
- Have you re-installed the OS?
- CPU
- RAM (brand, EXACT model, what slots are you using?)
- Video Card
- MotherBoard - (if NOT a laptop)
- Power Supply - brand & wattage (if laptop, skip this one)
- Is driver verifier enabled or disabled?
- What security software are you using? (Firewall, antivirus, antimalware, antispyware, and so forth)
- Are you using proxy, vpn, ipfilters or similar software?
- Are you using Disk Image tools? (like daemon tools, alcohol 52% or 120%, virtual CloneDrive, roxio software)
- Are you currently under/overclocking? Are there overclocking software installed on your system?
Run msinfo32
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Open an instance of elevated command prompt:
- Log on to your Windows 10 computer using any account of your preference.
- Once on the desktop screen, right-click the Start button.
- From the context menu, click Command Prompt (Admin) (a new black window should appear).
- Type the following into the Command Prompt (the black window):
  
  Code:
  
  msinfo32 /nfo "%USERPROFILE%\Desktop\msinfo32.nfo"
  
  (You should find msinfo32.nfo on your desktop, when it finishes)
Open and run DxDiag.exe
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This tool is used to collect info about devices to help troubleshoot problems with DirectX sound and video.
A support person might ask for this info, or you might post it in a forum when you ask for help.
- In Windows, select Start and enter dxdiag into the search box on the taskbar.
- Select dxdiag from the results.
- In the tool, select Save All Information for an easily shared format.
  
  Note
  
  You will find the Save All Information button between Next Page and Exit at the bottom of the window.
  
  (You should find dxdiag.txt on your desktop, when it finishes)
Retrieve System Information, using speccy
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- Download Speccy portable (click)
  (current version at the time of this post is 1.31.732, but it will change in the future... The link should always point to the newer version, by the way)
- Unzip/decompress it and put it on your desktop.
- When the program opens, it will retrieve some information regarding your system.
- Once it's done, select the File menu and choose Publish snapshot. Answer Yes to the confirmation message.
- On the next screen that comes up, choose the Copy to Clipboard button and paste this link in your next reply.
Download and install the Windows 10 SDK - Software Development Kit (click).
Currently it's named winsdksetup.exe, size 1.13MB; but this can change when newer versions are released.
Check the instructions I made for you:
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Click Download, save/run it and you'll see for first Specify location: leave it default or choose your preferred location, then click Next.

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Then you'll see Windows kits privacy: Niemiro said "you may opt in to CEIP if you so wish - it is not necessary, but you may wish to do so". Then click Next.

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Then you'll see License agreement: click Accept.

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Then you'll see Select the features you want to install: select only Windows Performance Toolkit and click Install.

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It will download and install the WinPerf. toolkit.

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Set the path environment variable adding the windows performance toolkit path: go to Control Panel\System and Security\System - advanced system settings, (click yes in the UAC window that should appear if you didn't disable it), click environment variables, double-click path under the system variables pane (or click it once and then click edit), and add C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\
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Unfortunately, the following command (that worked in previous windows OSs) doesn't work from an elevated command prompt:

Code:

SET PATH=%PATH%;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\
If you have chosen another path in specify location, you should provide THAT ONE.
You can generate a new trace with this command, from an elevated command prompt window:
Code:
```
xperf -on DiagEasy
```
In case you don't know how to open an elevated command prompt in windows 10, these are the available methods:
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- Right-click windows start, click command prompt (admin), click yes on the user account control window that should appear (if you didn't disable UAC)
- click start, click windows system, right-click the command prompt in the list, click run as administrator, click yes on the user account control window that should appear (if you didn't disable UAC)
- click start, type directly cmd (or prompt), right-click the command prompt in the list of results, click run as administrator, click yes on the user account control window that should appear (if you didn't disable UAC)
- The same of above is valid if you do it in the searchbox (Cortana)
- click start, type directly cmd (or prompt), (the command prompt should already be the first hit in the list of results), press and keep pressed (hold) ctrl + shift Keys on your keyboard, then press enter, click yes on the user account control window that should appear (if you didn't disable UAC)
- The same of above is valid if you do it in the searchbox (Cortana)
Wait some time (Niemiro said: "Wait until the computer has gone through a period of stuttering slowness") and then:
Code:
```
xperf -d "%userprofile%\Desktop\trace.etl"
```
(You should find the file trace.etl on your desktop, when it finishes)

Zip (no RAR, please) all the files up: trace.etl, msinfo32.nfo and DxDiag.txt (you should find them on the Desktop of your administrator account) and attach them to your next post.
Check MicroSoft Support How-To: Zip and unzip files (click) if you don't know how to zip files.
Don't forget to attach the link to your speccy snapshot.

asintoras · Mar 17, 2018

Re: POSTING INSTRUCTIONS for DPC/ISR latency, stuttering, cracks/pops

Hello,

Thanks for the information and reply.
I got up to Step E. My Laptop has Windows 7, not Windows 10. Step E says Windows 10 SDK... When I was downloading, the windows said "download" instead of "Install". I found a folder called Installers with lots of executable files.

Therefore, I couldn’t run xperf –on DiagEasy… It says that ‘xperf’ is not recognized as an internal or external program, operable program or batch file.
I installed Windows Performance Tool Kit but it was called now WindowsKits/10/WindowsSDK. There are several executable files in a folder called Installers. Should I install all of them?

I could not go forward from step E. Can you please help me explaining what can be wrong?
In the meantime, this is the information I gathered from the previous steps: Laptop issues
Many thanks, and kind regards,

axe0 · Mar 18, 2018

Re: POSTING INSTRUCTIONS for DPC/ISR latency, stuttering, cracks/pops

Hi asintoras,

If you installed WPT, you could open a command prompt in the folder with xperf.exe and run the command in it.

asintoras · Mar 18, 2018

Re: POSTING INSTRUCTIONS for DPC/ISR latency, stuttering, cracks/pops

It just does not work... From what I see, the link you posted was for Windows 10 and I have Windows 7...
The version for Windows 7 is called differently: Windows Automated Installation Kit (AIK). I am installing it right now and will check it out.

asintoras · Mar 18, 2018

Re: POSTING INSTRUCTIONS for DPC/ISR latency, stuttering, cracks/pops

I tried installing the AIK but it did not work either, as it was asking for a disc to burn the image and then said the image was too big for the disc and failed (the CD was new of course).
I updated the questionnaire in the Dropbox folder with a PDF showing the folder structure of what I downloaded, which apparently it's something else, despite being from the link you provided.

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Video STUTTERING, Audio CRACKS/POPS and dpc/isr LATENCY (posting instructions)

xilolee

Moderator, BSOD Academy Instructor

asintoras

New member

axe0

Forum Moderator, BSOD Kernel Dump Expert, BSOD Academy Instructor

asintoras

New member

asintoras

New member