Defrag Tools: #39 - Windows Performance Toolkit

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The Discussion

  • User profile image

    finally you touch my number 1 tool  Big Smile


    [06:23] - Articles

    ETW/xperf is too complicated for starters, so you don't see much users who use it. And the nw WPA.exe makes it even more complicated for new users, because no graphs are selected by default. So the users have no idea how to start.


    [18:30] - Windows Performance Recorder

    xperf (win8 version) is also able to generate the .net PDBs if you set the environment variable XPERF_CreateNGenPdbs to 1


  • User profile image

    is the network I/O provider collecting the same data as the commandline "netsh trace start [parameters]"? Can you use this stuff safely in production? For instance on an Exchange or SharePoint server or Domain Controller?

  • User profile image
    Nuno Freixo

    Hi Guys, this is a very interesting topic at the moment. I recently start using the new WPR and I find it very good. I would like to see episodes related to trace analysis regarding each advanced trace that you can get with WPR.

  • User profile image

    @Nuno Freixo: Thanks. Lots of episodes your way!

  • User profile image

    I've been using ETW for SQL Server tuning and troubleshooting for some time now and I have to say it's downright amazing. I've also written about it (it's in Portuguese):

    This is indeed a great topic. I'll be following closely Smiley

  • User profile image
    Kellen Sunderland

    Hey guys, I'd like to see a break down as well. It'd be great to have it for reference, just so that if down the road we run into a say audio popping problem, we'd be able to see how a PFE/EE would track it down.

  • User profile image

    @Kellen Sunderland


    Such audio issues are caused by DPC issues. Run this command from cmd prompt with admin rights:

    xperf -on latency -stackwalk profile -buffersize 1024 -MaxFile 256 -FileMode Circular && timeout -1 && xperf -d DPC_Interrupt.etl


    wait 60s and press a key.

    Now run this:

    xperf -I DPC_Interrupt.etl -a dpcisr > dpc.txt

    and open the txt file. Now look which drivers have an "Elapsed Time" larger 1024µs.


    Update the driver and see if this fixes it.

  • User profile image
    Marc Sherman

    I've been a fan of xperf for a couple of years now. Looking forward to every episode in this series!

  • User profile image

    Windows Performance Tool kit is too good and too complicated, so it would be good, if you could have a session in each one of the Major providers.

  • User profile image

    Lot of great information in these videos. Thanks and keep 'em coming!

  • User profile image

    Great start to the series. Looking forward to seeing more.

  • User profile image

    Any chance you could post your scripts?

  • User profile image

    here are the scripts:!11560

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