High DPC Latency Issues

tommyhawk101 · May 7, 2014

I have tried to download the ADK Windows Performance Analyzer, but when typing into CMD xperf -on DiagEasy i get following error in red "xperf: error: NT Kernel Logger: Cannot Create File when that file already exists. (oxb7).

Latancy Clipboard from Latency Monitor;
View attachment latency screenshot.docx
sorry cant figure how to make that doc show here. Any help would be awesome, I am pc user not a programmer and this issue causes my sound to reverb horribly with any mouse movement after about 25 minutes on PC start. I am using an A4 tech X7 gaming mouse which I dont know alot about. I spent decent money on it and would rather keep it. I have tried to keep most of my drivers up to date. My soundcard is SB audigy, pretty old and an Asus gtx 560 GPU.

I was trying to follow another topic and instructions on how to diagnose and fix the latency issue but the windows performance issue stopped me in my tracks.

thanks so much

TomasD · May 7, 2014

Hello,

The error "xperf: error: NT Kernel Logger: Cannot Create File when that file already exists. (oxb7)" in most cases are caused by other programs (or another XPERF instance), capturing ETW data, running at the same time. Please make sure to close LatencyMon, Process Monitor, Resource Monitor or other similar programs before proceeding with the next steps:

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:
1. Run the following command which will stop the tracing:
  
  Code:
  
  xperf -stop
2. 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
3. Reboot the computer
4. 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:
1. Run the following command to disable Driver Verifier, which causes the above error:
  
  Code:
  
  verifier /reset
2. Reboot the computer
3. 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 captures 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.

tommyhawk101 · May 13, 2014

thought i posted the cpu file, will in a little bit.

tommyhawk101 · May 13, 2014

think this will work, if anyone can help I would be quite thankful. https://drive.google.com/file/d/0B-axyZ9weFXGSTJGbEpqUkpVY0k/edit?usp=sharing

tommyhawk101 · May 18, 2014

tommyhawk101 said:
think this will work, if anyone can help I would be quite thankful. https://drive.google.com/file/d/0B-axyZ9weFXGSTJGbEpqUkpVY0k/edit?usp=sharing

any chance of some help?? like i have mentioned I am not a programmer, just a pc user and someone who can put a pc together.

TomasD · May 18, 2014

Do you have any devices connected via USB during the issues? Do you think you could try unplugging them and see if the issue persists?

tommyhawk101 · May 19, 2014

TomasD said:
Do you have any devices connected via USB during the issues? Do you think you could try unplugging them and see if the issue persists?

I have a usb keyboard and a usb gaming mouse, i suspect the gaming mouse. no other usb peripherals

TomasD · May 20, 2014

tommyhawk101 said:
TomasD said:

Do you have any devices connected via USB during the issues? Do you think you could try unplugging them and see if the issue persists?

Click to expand...

I have a usb keyboard and a usb gaming mouse, i suspect the gaming mouse. no other usb peripherals

Do you think you could try a different mouse on a different USB port?

tommyhawk101 · May 24, 2014

had a hard time finding the newest software that would work for my oscar gaming mouse. once i updated that the sound issue went away no matter how long i had pc on. I still have an issue that while in my world of tanks game and it get crowded with tanks the game will just freeze. take a couple seconds and then im moving again where i wasnt when it lagged. is this just internet lag or video gpu lag? is there a way to determine which it is?

TomasD · May 25, 2014

tommyhawk101 said:
had a hard time finding the newest software that would work for my oscar gaming mouse. once i updated that the sound issue went away no matter how long i had pc on.

Great, I'm really happy to hear that.

tommyhawk101 said:
I still have an issue that while in my world of tanks game and it get crowded with tanks the game will just freeze. take a couple seconds and then im moving again where i wasnt when it lagged. is this just internet lag or video gpu lag? is there a way to determine which it is?

Try the following:

Download Process Explorer.
Run it as administrator
Launch the game
As soon as you notice the issues, press WIN (or WIN+TAB) key to back to the desktop.
Check GPU and Network graphs history - they could help you to indicate where the issue is coming from..

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High DPC Latency Issues

tommyhawk101

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TomasD

Sysnative Staff, BSOD Kernel Dump Senior Analyst

tommyhawk101

Member

tommyhawk101

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tommyhawk101

Member

TomasD

Sysnative Staff, BSOD Kernel Dump Senior Analyst

tommyhawk101

Member

TomasD

Sysnative Staff, BSOD Kernel Dump Senior Analyst

tommyhawk101

Member

TomasD

Sysnative Staff, BSOD Kernel Dump Senior Analyst