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  1. #1

    [Win7SP1 x64] DPC, I've tried everything so far.

    Since May, I've noticed that my computer was having audio clicks and pops, especially with graphically demanding operation, such as watching videos on YT and playing games. This has been driving me crazy, as I cannot use my PC properly anymore.
    I've tried everything so far: I've tried to disable drivers, to update my bios, to disable cpu throttling in Control Panel, to update my motherboard's drivers, and recently I've even reset my whole system (which ran Windows 10 at the time), and everything on my hard drives has been whiped out (even though my usb wifi adapter was still running so I think it did not uninstall all the drivers). Right now I've downgraded my system to Windows 7, but it didn't help. I've ran LatencyMon after playing PUBG for 50 seconds, but I had to quit. Please help me, I'm about to give up on this computer. Here's the results:

    CONCLUSION
    _________________________________________________________________________________________________________
    Your system appears to be having trouble handling real-time audio and other tasks. You are likely to experience buffer underruns appearing as drop outs, clicks or pops. One or more DPC routines that belong to a driver running in your system appear to be executing for too long. Also one or more ISR routines that belong to a driver running in your system appear to be executing for too long. One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates.
    LatencyMon has been analyzing your system for 0:08:16 (h:mm:ss) on all processors.




    _________________________________________________________________________________________________________
    SYSTEM INFORMATION
    _________________________________________________________________________________________________________
    Computer name: MASARELLINI
    OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64)
    Hardware: ASUSTeK COMPUTER INC., RAMPAGE IV FORMULA
    CPU: GenuineIntel Intel(R) Core(TM) i7-3820 CPU @ 3.60GHz
    Logical processors: 8
    Processor groups: 1
    RAM: 16323 MB total




    _________________________________________________________________________________________________________
    CPU SPEED
    _________________________________________________________________________________________________________
    Reported CPU speed: 3602 MHz
    Measured CPU speed: 1 MHz (approx.)


    Note: reported execution times may be calculated based on a fixed reported CPU speed. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.


    WARNING: the CPU speed that was measured is only a fraction of the CPU speed reported. Your CPUs may be throttled back due to variable speed settings and thermal issues. It is suggested that you run a utility which reports your actual CPU frequency and temperature.






    _________________________________________________________________________________________________________
    MEASURED INTERRUPT TO USER PROCESS LATENCIES
    _________________________________________________________________________________________________________
    The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. This includes the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.


    Highest measured interrupt to process latency (s): 36893,886156
    Average measured interrupt to process latency (s): 2,891571


    Highest measured interrupt to DPC latency (s): 130,200338
    Average measured interrupt to DPC latency (s): 0,744494




    _________________________________________________________________________________________________________
    REPORTED ISRs
    _________________________________________________________________________________________________________
    Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.


    Highest ISR routine execution time (s): 37587,565519
    Driver with highest ISR routine execution time: storport.sys - Microsoft Storage Port Driver, Microsoft Corporation


    Highest reported total ISR routine time (%): 0,222278
    Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation


    Total time spent in ISRs (%) 0,356477


    ISR count (execution time <250 s): 1048835
    ISR count (execution time 250-500 s): 0
    ISR count (execution time 500-999 s): 2
    ISR count (execution time 1000-1999 s): 2
    ISR count (execution time 2000-3999 s): 1
    ISR count (execution time >=4000 s): 0




    _________________________________________________________________________________________________________
    REPORTED DPCs
    _________________________________________________________________________________________________________
    DPC routines are part of the interrupt servicing dispatch mechanism and disable the possibility for a process to utilize the CPU while it is interrupted until the DPC has finished execution.


    Highest DPC routine execution time (s): 37320,991949
    Driver with highest DPC routine execution time: USBPORT.SYS - Driver porta USB 1.1 & 2.0, Microsoft Corporation


    Highest reported total DPC routine time (%): 0,093109
    Driver with highest DPC total execution time: USBPORT.SYS - Driver porta USB 1.1 & 2.0, Microsoft Corporation


    Total time spent in DPCs (%) 0,329619


    DPC count (execution time <250 s): 4247025
    DPC count (execution time 250-500 s): 0
    DPC count (execution time 500-999 s): 278
    DPC count (execution time 1000-1999 s): 3
    DPC count (execution time 2000-3999 s): 0
    DPC count (execution time >=4000 s): 0




    _________________________________________________________________________________________________________
    REPORTED HARD PAGEFAULTS
    _________________________________________________________________________________________________________
    Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.


    NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.


    Process with highest pagefault count: svchost.exe


    Total number of hard pagefaults 11027
    Hard pagefault count of hardest hit process: 2723
    Highest hard pagefault resolution time (s): 501755,462798
    Total time spent in hard pagefaults (%): 0,780657
    Number of processes hit: 34




    _________________________________________________________________________________________________________
    PER CPU DATA
    _________________________________________________________________________________________________________
    CPU 0 Interrupt cycle time (s): 6,648770
    CPU 0 ISR highest execution time (s): 18,611327
    CPU 0 ISR total execution time (s): 0,371662
    CPU 0 ISR count: 487493
    CPU 0 DPC highest execution time (s): 36272,820933
    CPU 0 DPC total execution time (s): 1,853360
    CPU 0 DPC count: 2553894
    _________________________________________________________________________________________________________
    CPU 1 Interrupt cycle time (s): 5,013019
    CPU 1 ISR highest execution time (s): 0,0
    CPU 1 ISR total execution time (s): 0,0
    CPU 1 ISR count: 0
    CPU 1 DPC highest execution time (s): 96,775403
    CPU 1 DPC total execution time (s): 0,047409
    CPU 1 DPC count: 6848
    _________________________________________________________________________________________________________
    CPU 2 Interrupt cycle time (s): 7,916518
    CPU 2 ISR highest execution time (s): 37130,498612
    CPU 2 ISR total execution time (s): 2,890027
    CPU 2 ISR count: 100388
    CPU 2 DPC highest execution time (s): 32450,108828
    CPU 2 DPC total execution time (s): 1,355897
    CPU 2 DPC count: 223023
    _________________________________________________________________________________________________________
    CPU 3 Interrupt cycle time (s): 18,328112
    CPU 3 ISR highest execution time (s): 37111,685730
    CPU 3 ISR total execution time (s): 7,263395
    CPU 3 ISR count: 238539
    CPU 3 DPC highest execution time (s): 37320,991949
    CPU 3 DPC total execution time (s): 8,136909
    CPU 3 DPC count: 811812
    _________________________________________________________________________________________________________
    CPU 4 Interrupt cycle time (s): 5,613938
    CPU 4 ISR highest execution time (s): 32098,494170
    CPU 4 ISR total execution time (s): 0,319480
    CPU 4 ISR count: 55177
    CPU 4 DPC highest execution time (s): 36832,689895
    CPU 4 DPC total execution time (s): 0,484139
    CPU 4 DPC count: 350879
    _________________________________________________________________________________________________________
    CPU 5 Interrupt cycle time (s): 9,039493
    CPU 5 ISR highest execution time (s): 37587,565519
    CPU 5 ISR total execution time (s): 3,304153
    CPU 5 ISR count: 167290
    CPU 5 DPC highest execution time (s): 36116,253748
    CPU 5 DPC total execution time (s): 0,972321
    CPU 5 DPC count: 246958
    _________________________________________________________________________________________________________
    CPU 6 Interrupt cycle time (s): 4,880792
    CPU 6 ISR highest execution time (s): 0,0
    CPU 6 ISR total execution time (s): 0,0
    CPU 6 ISR count: 0
    CPU 6 DPC highest execution time (s): 87,760411
    CPU 6 DPC total execution time (s): 0,184327
    CPU 6 DPC count: 50029
    _________________________________________________________________________________________________________
    CPU 7 Interrupt cycle time (s): 4,385198
    CPU 7 ISR highest execution time (s): 0,0
    CPU 7 ISR total execution time (s): 0,0
    CPU 7 ISR count: 0
    CPU 7 DPC highest execution time (s): 30677,078845
    CPU 7 DPC total execution time (s): 0,048346
    CPU 7 DPC count: 3922
    _________________________________________________________________________________________________________
    [Win7SP1 x64] DPC, I've tried everything so far.-ucc-png


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  2. #2
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    • specs System Specs
      • Motherboard:
        ASUS MAXIMUS ROG HERO X
      • CPU:
        Intel Core i7-8700K 3.7GHz
      • Memory:
        Crucial 2x8GB DDR4 2666 MHz
      • Graphics:
        Gigabyte GTX 1080 G1 Gaming 8 GB
      • Sound Card:
        Asus Xonar DSX
      • Hard Drives:
        WD Caviar Black 1TB SATA III 7200rpm, WD Caviar Black 6TB SATA III 7200rpm
      • Disk Drives:
        Samsung 960 Evo 256GB NVME PCIe
      • Power Supply:
        Corsair HX 750W 80+ Platinum
      • Case:
        Fractal Design Define R6
      • Cooling:
        Noctua NH-D14
      • Display:
        Philips Brilliance BDM4065UC 4K 3840x2160
      • Operating System:
        Windows 10 Pro 1803 x64

    Re: DPC Latency problem. I've tried everything so far...


  3. #3

    Re: DPC Latency problem. I've tried everything so far...

    Quote Originally Posted by softwaremaniac View Post
    Please follow these instructions:

    Hello, these instructions are meant for Windows 10. I've tried to follow the guide but it's not working. I am running Win 7 right now: should I upgrade my OS again?

  4. #4
    Moderator
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    Join Date
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    Croatia
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    Posts
    15,398
    • specs System Specs
      • Motherboard:
        ASUS MAXIMUS ROG HERO X
      • CPU:
        Intel Core i7-8700K 3.7GHz
      • Memory:
        Crucial 2x8GB DDR4 2666 MHz
      • Graphics:
        Gigabyte GTX 1080 G1 Gaming 8 GB
      • Sound Card:
        Asus Xonar DSX
      • Hard Drives:
        WD Caviar Black 1TB SATA III 7200rpm, WD Caviar Black 6TB SATA III 7200rpm
      • Disk Drives:
        Samsung 960 Evo 256GB NVME PCIe
      • Power Supply:
        Corsair HX 750W 80+ Platinum
      • Case:
        Fractal Design Define R6
      • Cooling:
        Noctua NH-D14
      • Display:
        Philips Brilliance BDM4065UC 4K 3840x2160
      • Operating System:
        Windows 10 Pro 1803 x64

    Re: DPC Latency problem. I've tried everything so far...

    They are not only for W10. We need the log files in order to be able to help.

  5. #5

    Re: DPC Latency problem. I've tried everything so far...

    Hello, I've tried to follow that guide. First of all after downloading the software from the provided link I only get the "Download the WSDK" option (I'll screenshot this passage). After selecting "Windows performance toolkit", the installer tells me to open another executable file that was downloaded in the path that I've previously chosen, to install Windows performance toolkit. If I open it, I get the error. I've also uploaded a screenshot of it. Maybe this program is for Windows 10 only, or at least it says so in the guide
    Attached Thumbnails Attached Thumbnails [Win7SP1 x64] DPC, I've tried everything so far.-error-png   [Win7SP1 x64] DPC, I've tried everything so far.-screenshot_1-png  

  6. #6

    Re: DPC Latency problem. I've tried everything so far...

    Up. Please help me. I'm willing to donate something if I manage to solve this problem, since the only alternative is to throw this PC in the trash

  7. #7
    Moderator
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    softwaremaniac's Avatar
    Join Date
    Oct 2014
    Location
    Croatia
    Age
    23
    Posts
    15,398
    • specs System Specs
      • Motherboard:
        ASUS MAXIMUS ROG HERO X
      • CPU:
        Intel Core i7-8700K 3.7GHz
      • Memory:
        Crucial 2x8GB DDR4 2666 MHz
      • Graphics:
        Gigabyte GTX 1080 G1 Gaming 8 GB
      • Sound Card:
        Asus Xonar DSX
      • Hard Drives:
        WD Caviar Black 1TB SATA III 7200rpm, WD Caviar Black 6TB SATA III 7200rpm
      • Disk Drives:
        Samsung 960 Evo 256GB NVME PCIe
      • Power Supply:
        Corsair HX 750W 80+ Platinum
      • Case:
        Fractal Design Define R6
      • Cooling:
        Noctua NH-D14
      • Display:
        Philips Brilliance BDM4065UC 4K 3840x2160
      • Operating System:
        Windows 10 Pro 1803 x64

    Re: DPC Latency problem. I've tried everything so far...

    This tool you have downloaded is for Windows 10. Let's take a different route: which USB devices do you use?

  8. #8
    Moderator
    BSOD Kernel Dump Analyst
    Windows Update Instructor
    softwaremaniac's Avatar
    Join Date
    Oct 2014
    Location
    Croatia
    Age
    23
    Posts
    15,398
    • specs System Specs
      • Motherboard:
        ASUS MAXIMUS ROG HERO X
      • CPU:
        Intel Core i7-8700K 3.7GHz
      • Memory:
        Crucial 2x8GB DDR4 2666 MHz
      • Graphics:
        Gigabyte GTX 1080 G1 Gaming 8 GB
      • Sound Card:
        Asus Xonar DSX
      • Hard Drives:
        WD Caviar Black 1TB SATA III 7200rpm, WD Caviar Black 6TB SATA III 7200rpm
      • Disk Drives:
        Samsung 960 Evo 256GB NVME PCIe
      • Power Supply:
        Corsair HX 750W 80+ Platinum
      • Case:
        Fractal Design Define R6
      • Cooling:
        Noctua NH-D14
      • Display:
        Philips Brilliance BDM4065UC 4K 3840x2160
      • Operating System:
        Windows 10 Pro 1803 x64

    Re: DPC Latency problem. I've tried everything so far...

    In order to help you a bit more, please follow these instructions: How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8)
    Hopefully, you'll be able to provide a trace for me to check :)

  9. #9

    Re: DPC Latency problem. I've tried everything so far...

    Hello, thanks for the reply. I'm currently using a USB Wireless Adapter, a Razer Blackwidow Stealth USB Keyboard (and a usb mouse connected to an USB port that the keyboard has), a docking station for my phone, a USB headset (Logitech G633). I've followed the guide and I've managed to create a trace file... I remember doing this process on Windows 10 when I first started to have this problem, and I rember that after opening the trace all the faulty processes would show up. I can't seem to find them right now, and I don't know why. Anyway, I've ran Latencymon at the same time, and I will also provide you with a screenshot of all the drivers that caused high latency. I'll try to provide you with another trace later, since this time I've only had high latency for a few seconds.

    Link to the trace: Dropbox - trace.etl

    Again, thank you for helping me
    Attached Thumbnails Attached Thumbnails [Win7SP1 x64] DPC, I've tried everything so far.-screenshotf-png   [Win7SP1 x64] DPC, I've tried everything so far.-screenshotff-png  

  10. #10
    Moderator
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    Join Date
    Oct 2014
    Location
    Croatia
    Age
    23
    Posts
    15,398
    • specs System Specs
      • Motherboard:
        ASUS MAXIMUS ROG HERO X
      • CPU:
        Intel Core i7-8700K 3.7GHz
      • Memory:
        Crucial 2x8GB DDR4 2666 MHz
      • Graphics:
        Gigabyte GTX 1080 G1 Gaming 8 GB
      • Sound Card:
        Asus Xonar DSX
      • Hard Drives:
        WD Caviar Black 1TB SATA III 7200rpm, WD Caviar Black 6TB SATA III 7200rpm
      • Disk Drives:
        Samsung 960 Evo 256GB NVME PCIe
      • Power Supply:
        Corsair HX 750W 80+ Platinum
      • Case:
        Fractal Design Define R6
      • Cooling:
        Noctua NH-D14
      • Display:
        Philips Brilliance BDM4065UC 4K 3840x2160
      • Operating System:
        Windows 10 Pro 1803 x64

    Re: DPC Latency problem. I've tried everything so far...

    Try using your computer without some of the connected USBs. I think one of them might be a problem.

  11. #11

    Re: DPC Latency problem. I've tried everything so far...

    Now that I'm thinking about it I've started to get this problem around the time that I got my headset. But I've already tried to unplug it while the latency is making my computer lag, and nothing happened... anyway, I'll try to record a more accurate trace

  12. #12

    Re: DPC Latency problem. I've tried everything so far...

    Here's the working and more accurate trace: Dropbox - MASARELLINI.09-29-2017.21-16-13.etl

  13. #13
    Moderator
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    Windows Update Instructor
    softwaremaniac's Avatar
    Join Date
    Oct 2014
    Location
    Croatia
    Age
    23
    Posts
    15,398
    • specs System Specs
      • Motherboard:
        ASUS MAXIMUS ROG HERO X
      • CPU:
        Intel Core i7-8700K 3.7GHz
      • Memory:
        Crucial 2x8GB DDR4 2666 MHz
      • Graphics:
        Gigabyte GTX 1080 G1 Gaming 8 GB
      • Sound Card:
        Asus Xonar DSX
      • Hard Drives:
        WD Caviar Black 1TB SATA III 7200rpm, WD Caviar Black 6TB SATA III 7200rpm
      • Disk Drives:
        Samsung 960 Evo 256GB NVME PCIe
      • Power Supply:
        Corsair HX 750W 80+ Platinum
      • Case:
        Fractal Design Define R6
      • Cooling:
        Noctua NH-D14
      • Display:
        Philips Brilliance BDM4065UC 4K 3840x2160
      • Operating System:
        Windows 10 Pro 1803 x64

    Re: DPC Latency problem. I've tried everything so far...

    Are your drivers updated? Chipset and GPU especially?

  14. #14

    Re: DPC Latency problem. I've tried everything so far...

    Yes. The GPUs (I have GTX 680 sli) drivers are updated. I've also tried tried to uninstall them completely and to download them through GeForce Experience, but nothing changed. I don't know about the chipset, I've tried to look for drivers in the site of the manufacturer, but they don't seem to be there.

    Downloads for Intel(R) Core™ i7-3820 Processor (10M Cache, up to 3.80 GHz)

    Anyway, they should have been updated automatically through Windows Update.

  15. #15
    Moderator
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    Join Date
    Oct 2014
    Location
    Croatia
    Age
    23
    Posts
    15,398
    • specs System Specs
      • Motherboard:
        ASUS MAXIMUS ROG HERO X
      • CPU:
        Intel Core i7-8700K 3.7GHz
      • Memory:
        Crucial 2x8GB DDR4 2666 MHz
      • Graphics:
        Gigabyte GTX 1080 G1 Gaming 8 GB
      • Sound Card:
        Asus Xonar DSX
      • Hard Drives:
        WD Caviar Black 1TB SATA III 7200rpm, WD Caviar Black 6TB SATA III 7200rpm
      • Disk Drives:
        Samsung 960 Evo 256GB NVME PCIe
      • Power Supply:
        Corsair HX 750W 80+ Platinum
      • Case:
        Fractal Design Define R6
      • Cooling:
        Noctua NH-D14
      • Display:
        Philips Brilliance BDM4065UC 4K 3840x2160
      • Operating System:
        Windows 10 Pro 1803 x64

    Re: DPC Latency problem. I've tried everything so far...

    Download Snappy Driver Installer and see what it says.

  16. #16

    Re: DPC Latency problem. I've tried everything so far...

    Over 80 drivers not found or not updated. I'm letting the program install them all (also, thanks for your suggestion, it looks like a really good program). Also, I've unplugged my keyboard while the latency was kicking in, and it immediately stopped: maybe it's just a coincidence, I've had this keyboard since 2015. I'll let you know once the drivers have all been installed.

  17. #17
    Moderator
    BSOD Kernel Dump Analyst
    Windows Update Instructor
    softwaremaniac's Avatar
    Join Date
    Oct 2014
    Location
    Croatia
    Age
    23
    Posts
    15,398
    • specs System Specs
      • Motherboard:
        ASUS MAXIMUS ROG HERO X
      • CPU:
        Intel Core i7-8700K 3.7GHz
      • Memory:
        Crucial 2x8GB DDR4 2666 MHz
      • Graphics:
        Gigabyte GTX 1080 G1 Gaming 8 GB
      • Sound Card:
        Asus Xonar DSX
      • Hard Drives:
        WD Caviar Black 1TB SATA III 7200rpm, WD Caviar Black 6TB SATA III 7200rpm
      • Disk Drives:
        Samsung 960 Evo 256GB NVME PCIe
      • Power Supply:
        Corsair HX 750W 80+ Platinum
      • Case:
        Fractal Design Define R6
      • Cooling:
        Noctua NH-D14
      • Display:
        Philips Brilliance BDM4065UC 4K 3840x2160
      • Operating System:
        Windows 10 Pro 1803 x64

    Re: DPC Latency problem. I've tried everything so far...

    I hope you've created a restore point within the software just in case?

  18. #18

    Re: DPC Latency problem. I've tried everything so far...

    Yes I did, the option is checked automatically.

  19. #19
    Moderator
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    Join Date
    Oct 2014
    Location
    Croatia
    Age
    23
    Posts
    15,398
    • specs System Specs
      • Motherboard:
        ASUS MAXIMUS ROG HERO X
      • CPU:
        Intel Core i7-8700K 3.7GHz
      • Memory:
        Crucial 2x8GB DDR4 2666 MHz
      • Graphics:
        Gigabyte GTX 1080 G1 Gaming 8 GB
      • Sound Card:
        Asus Xonar DSX
      • Hard Drives:
        WD Caviar Black 1TB SATA III 7200rpm, WD Caviar Black 6TB SATA III 7200rpm
      • Disk Drives:
        Samsung 960 Evo 256GB NVME PCIe
      • Power Supply:
        Corsair HX 750W 80+ Platinum
      • Case:
        Fractal Design Define R6
      • Cooling:
        Noctua NH-D14
      • Display:
        Philips Brilliance BDM4065UC 4K 3840x2160
      • Operating System:
        Windows 10 Pro 1803 x64

    Re: DPC Latency problem. I've tried everything so far...

    Any progress?

  20. #20

    Re: DPC Latency problem. I've tried everything so far...

    Quote Originally Posted by softwaremaniac View Post
    Any progress?
    Yes. Sorry for the late reply. So, something went wrong with the driver installation and I've had BSOD every time after the Windows logo. I've had to reinstall Windows, since the restore points were not working for some reason. I've done this process several times, trying to pin point the driver that was giving me BSOD: these are the only drivers left out of the initial 81 (check the attached image). The latency still kicks in while playing games or watching videos.
    Attached Thumbnails Attached Thumbnails [Win7SP1 x64] DPC, I've tried everything so far.-screenshot_1-png  

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