Windows 8 and 8.1 Forums


Windows 8.1 High DPC Latency,(annoying static sound)-Help.

  1. #11


    Wynnum Australia
    Posts : 466
    Windows-10-Pro-Build-11099.rs1-x64


    No Password for MTDVD, but it's packed with WinRAR 5.

    HPET is in my Device-Manager and when I check it with "bcdedit /deletevalue useplatformclock" via elevated cmd, then I get no error, so yes it's activated and in use.

    You could maybe try the K-Lite-Codec-Pack, which I use / install an all Windows-Systems, no matter if with WMC or not.

    I install such basics the easy way via Ninite.

    For actual drivers I go to Necacom.

    You could download a Youtube-Video via tools like Youtube-Downloader etc. and have a look if you still have the issue, if you play the video locally without streaming it.

    Is there something similar in the hardware or even equal with your friends computer, which has the issue as well ?

    PS:

    Will have to go to bed now, as I have unfortunately to get-up early for work, but will be back tomorrow.


      My System SpecsSystem Spec

  2. #12


    Wynnum Australia
    Posts : 466
    Windows-10-Pro-Build-11099.rs1-x64


    Quote Originally Posted by scarface0004 View Post
    Oh and Event Viewer has shown 2 errors (before the cleanup I mention before) . I think they are both Internet related :
    -The server {1B1F472E-3221-4826-97DB-2C2324D389AE} did not register with DCOM within the required timeout. EVENT ID :10010
    -The server {BF6C1E47-86EC-4194-9CE5-13C15DCB2001} did not register with DCOM within the required timeout. EVENT ID : 10010
    But like I said those showed up before the cleaning I did using CMD .
    Have a look here: Click

    I don't have that one in my log's, but I use a M$-Account.

      My System SpecsSystem Spec

  3. #13


    Posts : 26
    Windows 8.1 Pro x64


    So ...
    I have installed the K-Lite-Codec-Pack(didn't see the diffrence) .I re-enabled Hpet mode and the green bars wen't to yellow bars consistently . I also noticed this , while I was playing a video on a website using flash :

    Click image for larger version
    I will take my time now and do all the stuff you mentioned before .
    Thank you for the already great tips . I hope there is that "one fix".
      My System SpecsSystem Spec

  4. #14


    Posts : 26
    Windows 8.1 Pro x64


    And forgot to mention , no my friend and I have nothing familliar in our pcs , they are both really bad.
      My System SpecsSystem Spec

  5. #15


    Boston
    Posts : 25
    Windows 8.1 Pro x64


    you can't use dpc latency checker on windows 8 since it doesn't work right; it will show insane values for everyone. Stick only with latencymon and having said that your latency is not bad.
      My System SpecsSystem Spec

  6. #16


    Posts : 26
    Windows 8.1 Pro x64


    zahl trust me it is from personal experiences. The crackling/popping audio is so freaking annoying. I mean it doesn't pop like every second , but it does like ever 2 or 5minutes , which can get really annoying . Hopefully Microsoft will have a fix for that in the Update 2...
      My System SpecsSystem Spec

  7. #17


    Posts : 26
    Windows 8.1 Pro x64


    Ok so this is what I get after running LatecyMon for 2min (And I have HPET Enabled in bios and set to 32bit-default):

    Sorted by tabs:

    Main:
    Click image for larger version

    Stats:
    ____________________________________________________________________________________________________ _____
    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 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 0:02:05 (h:mm:ss) on all processors.




    ____________________________________________________________________________________________________ _____
    SYSTEM INFORMATION
    ____________________________________________________________________________________________________ _____
    Computer name: SCARFACE
    OS version: Windows 8 , 6.2, build: 9200 (x64)
    Hardware: G41MT-S2PT, Gigabyte Technology Co., Ltd.
    CPU: GenuineIntel Intel(R) Celeron(R) CPU E3400 @ 2.60GHz
    Logical processors: 2
    Processor groups: 1
    RAM: 3964 MB total




    ____________________________________________________________________________________________________ _____
    CPU SPEED
    ____________________________________________________________________________________________________ _____
    Reported CPU speed: 2594,0 MHz
    Measured CPU speed: 2073,0 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.




    ____________________________________________________________________________________________________ _____
    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 (Ás): 19809,177108
    Average measured interrupt to process latency (Ás): 4,356543


    Highest measured interrupt to DPC latency (Ás): 78,176976
    Average measured interrupt to DPC latency (Ás): 1,375999




    ____________________________________________________________________________________________________ _____
    MEASURED SMI, IPI AND CPU STALLS
    ____________________________________________________________________________________________________ _____
    The SMI, IPI and CPU stalls value represents the highest measured interval that a CPU did not respond while having its maskable interrupts disabled.


    Highest measured SMI or CPU stall (Ás) 6,317331




    ____________________________________________________________________________________________________ _____
    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 (Ás): 13,666538
    Driver with highest ISR routine execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation


    Highest reported total ISR routine time (%): 0,003660
    Driver with highest ISR total time: ataport.SYS - ATAPI Driver Extension, Microsoft Corporation


    Total time spent in ISRs (%) 0,007759


    ISR count (execution time <250 Ás): 3279
    ISR count (execution time 250-500 Ás): 0
    ISR count (execution time 500-999 Ás): 0
    ISR count (execution time 1000-1999 Ás): 0
    ISR count (execution time 2000-3999 Ás): 0
    ISR count (execution time >=4000 Ás): 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 (Ás): 134,319969
    Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation


    Highest reported total DPC routine time (%): 0,100073
    Driver with highest DPC total execution time: rspLLL64.sys - Resplendence Latency Monitoring and Auxiliary Kernel Library, Resplendence Software Projects Sp.


    Total time spent in DPCs (%) 0,224633


    DPC count (execution time <250 Ás): 350002
    DPC count (execution time 250-500 Ás): 0
    DPC count (execution time 500-999 Ás): 0
    DPC count (execution time 1000-1999 Ás): 0
    DPC count (execution time 2000-3999 Ás): 0
    DPC count (execution time >=4000 Ás): 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.




    Process with highest pagefault count: chrome.exe


    Total number of hard pagefaults 1
    Hard pagefault count of hardest hit process: 1
    Highest hard pagefault resolution time (Ás): 9,897841
    Total time spent in hard pagefaults (%): 0,000004
    Number of processes hit: 1




    ____________________________________________________________________________________________________ _____
    PER CPU DATA
    ____________________________________________________________________________________________________ _____
    CPU 0 Interrupt cycle time (s): 1,449791
    CPU 0 ISR highest execution time (Ás): 13,340786
    CPU 0 ISR total execution time (s): 0,009338
    CPU 0 ISR count: 1595
    CPU 0 DPC highest execution time (Ás): 90,909792
    CPU 0 DPC total execution time (s): 0,521476
    CPU 0 DPC count: 346454
    ____________________________________________________________________________________________________ _____
    CPU 1 Interrupt cycle time (s): 0,328626
    CPU 1 ISR highest execution time (Ás): 13,666538
    CPU 1 ISR total execution time (s): 0,010064
    CPU 1 ISR count: 1684
    CPU 1 DPC highest execution time (Ás): 134,319969
    CPU 1 DPC total execution time (s): 0,040246
    CPU 1 DPC count: 3548
    ____________________________________________________________________________________________________ _____

    Processes:
    Click image for larger version

    Drivers:
    Click image for larger version

    CPUs:
    Click image for larger version

    So no its not normal , on the Main tab , it was all stable maximum 256 and then it just jumped 19809 and then back to some low values like 33. Tips are welcome!
    Attached Thumbnails Attached Thumbnails Screenshot (3).png  
      My System SpecsSystem Spec

  8. #18


    Boston
    Posts : 25
    Windows 8.1 Pro x64


    Have you tried running hpet in 64bit mode or disabled? why 32bit with a x64 os.

    Also try going into windows power options and disable "usb selective suspend setting"
      My System SpecsSystem Spec

  9. #19


    Posts : 26
    Windows 8.1 Pro x64


    Will try x64bit , usb selective suspend setting have already disabled.
      My System SpecsSystem Spec

  10. #20


    Posts : 26
    Windows 8.1 Pro x64


    Ok , so windows boot like in 20sec before it did in 29. Have run Latency Mon for 8minutes , and have not seen a spike . The maxium was 886 , I am guessing that is because I launched LatencyMon at startup... Although I noticed the the DPC was unstable.It wen't from 12 to 123 or something . Will see how it performs in everyday use , but I have seen the lowest values with HPET OFF.
      My System SpecsSystem Spec

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