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  1. #41

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    I've been going through the tutorial, and things have been working out until the second command line entry. I enter that in, and the cmd box gives me this error:

    Running cmd as Administrator:


    xperf -on DiagEasy


    Then after waiting a time for the chugging and slowdown, I entered:


    xperf -d %userprofile%\Desktop\trace.etl


    and receive:
    xperf: error: -d: does not expect 2 argument(s).


    And the cmd then describes a list of Trace Stop options.

    Is there an alternative command I can use?


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  2. #42
    jcgriff2's Avatar
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    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Quote Originally Posted by UncleKulikov View Post

    xperf -d %userprofile%\Desktop\trace.etl

    and receive:
    xperf: error: -d: does not expect 2 argument(s).
    Does your computer username contain a space or other non-alpha, non-numeric character?

    If so, try the command with quotes:

    Code:
    xperf -d "%userprofile%\Desktop\trace.etl"
    Regrds. . .

    jcgriff2

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  3. #43

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Does your computer username contain a space or other non-alpha, non-numeric character?

    If so, try the command with quotes:

    Code:
    xperf -d "%userprofile%\Desktop\trace.etl"
    Regrds. . .

    jcgriff2
    That was it. Thanks!

  4. #44

    Re: I need Help when I get to part two.

    [ I have gotten as far as part two and then when I type in the "xperf-on DiagEasy" my computer says ""Xperf" is not recognized as an internal or external command, operable program or batch file" Please help me I just got this laptop for Christmas and it already has a crackle in the speaker]

  5. #45

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Hi, I'm having problems getting out of the starting gate...have downloaded & installed ADK with the Performance Toolkit, but when I enter "xperf-on DiagEasy" at the command prompt I receive only 'xperf-on' is not recognized as an internal or external command, operable program or batch file. I've tried running the command both simply at "cmd.exe", and also right clicking cmd.exe > Run as Administrator. Thanks for any help...
    Attached Thumbnails Attached Thumbnails How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)-xperf-jpg  

  6. #46

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    sorry...I have also tried with the space following xperf: xperf -on DiagEasy. Same result.

  7. #47

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Re-started system after ADK install....now the commands work.

  8. #48

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Excellent guide, but I am having a command error with this command xperf %userprofile%\Desktop\trace.etl.

    I even tried it from the Desktop subdirectory.
    C:\Users\xxxxxx\Desktop>xperf trace.etl
    xperf: error: trace.etl: The parameter is incorrect. (0x80070057).

    Microsoft (R) Windows (R) Performance Analyzer Version 6.3.9600
    Performance Analyzer Command Line
    I loaded the etl file manually in Windows Performance Analyzer, but none of the views I saw conformed with the instructions, so I cannot find the right screens to follow along. My Windows Performance Analyzer version is version 6.3.9600.16384 winblue rtm 130821-1623
    Thank you for any assistance you can offer.

    Instant Update: Okay, just found at technet that xperf is no longer valid for that function. It is changed to "wpa" on the command line. However, I still need some guidance on where to find the correct graphs as they seem to have changed things around a bit.

    https://social.technet.microsoft.com...um=w8itproperf

  9. #49

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Hi, thanks for the tutorial - the steps are well explained maybe except the fact that you have to wait couple of minutes to generate log files which is quiet big.

    It my case it shows the NDIS.SYS is the reason - how can I fix it ?
    I run also Latencymon - showing that TCPIP.SYS is a problem.

    I believe all this is related to network.
    Device Manager shows that all my drivers are correct and I installed newest one from Dell website but it does not help.
    I also updated nvidia drivers, clean computer with cccleaner, checked for virus, run Malwarebytes , disconnected windows security essential - nothing helps

    My cpu goes sometimes up to 100% when watching online videos ( in any browser, html5 player or flash ) most of the time , but it can also happen when I open too many tabs even without video.
    It usually goes away after a minute or two , or when I close browser.
    Recently it happened when playing music in vlc.

    This thing is really driving me nuts - never had such a problem.
    I have 4 years old dell precision m4500 , i7, 8gb ram, nvidia quadro card. The problem is new - I experience it since one month and don't remember any major changes which could cause it.

    Please help

  10. #50

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    I do hope I am using this forum right, but I am trying this diagnosis and get stuck on a certain point.
    When I use the cmd(in admin mode)
    xperf - d gebruiker\desktop\trace.etl

    I get the following RED message:
    xperf: error: NT Kernel Logger: The instance name passed was not recognized as valid by a WMI data provider (0x1069)

    Can anybody help me?

  11. #51
    xilolee's Avatar
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    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Hi Levien.
    Re-try with the quotation marks:
    Code:
    xperf -d "%userprofile%\Desktop\trace.etl"

  12. #52

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    I did try it and I get a different error:
    xperf: Error: Merge ETL: system cant find given path (0x3) (translated from Dutch)

  13. #53
    xilolee's Avatar
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    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Uh?
    Try the entire path:
    Code:
    xperf -d "c:\users\your-user-name\Desktop\trace.etl"
    (obviously, you should put the real username of your user account, instead of your-user-name in that code)

  14. #54

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Yay! I tried it and it worked, Thank you!
    After that I had to use WPA to get the analysis. I have the chart and the table. It shows one huge spike, which corresponds to my problem.
    Only it doesnt show the names of the modules. I made a screenshot:
    How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)-dpc-duration-cpu-png

  15. #55
    TomasD's Avatar
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    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Quote Originally Posted by Levien View Post
    Yay! I tried it and it worked, Thank you!
    After that I had to use WPA to get the analysis. I have the chart and the table. It shows one huge spike, which corresponds to my problem.
    Only it doesnt show the names of the modules. I made a screenshot:
    How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)-dpc-duration-cpu-png
    Please attach the ETL file to your other thread.
    http://www.dabasinskas.net (MCP | MCTS | MCITP | MCSA | MCSE | MVP | MS | ITV3F | ZCE | VCA)


  16. #56

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    http://www.filedropper.com/trace

    This is my ETL file

  17. #57
    TomasD's Avatar
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    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Quote Originally Posted by Levien View Post
    The issue is caused by DDDriver64Dcsa.sys driver and it seems to be a known issue.
    http://www.dabasinskas.net (MCP | MCTS | MCITP | MCSA | MCSE | MVP | MS | ITV3F | ZCE | VCA)


  18. #58

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Thank you! it is solved!

  19. #59

    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    I get as far as putting xperf -on DiagEasy in command promt but i get the following error:

    xperf: error: NT Kernel Logger: Access is denied. (0x5).

    Any ideas?

  20. #60
    xilolee's Avatar
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    Re: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)

    Hi bordraw.
    Have you tried the same command from an elevated command prompt?

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