Windows 8 and 8.1 Forums


Let's take a look at my DPC (LatencyMon)

  1. #1


    Posts : 13
    windows 8

    Let's take a look at my DPC (LatencyMon)


    Can you take a look at these stats from latencymon and tell me if they are normal? I have included the main stats and screenshot of drivers and processes list after 1 hour of test, running different apps.

    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. At least one detected problem appears to be network related. In case you are using a WLAN adapter, try disabling it to get better results. 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 1:00:32 (h:mm:ss) on all processors.




    ____________________________________________________________________________________________________ _____
    SYSTEM INFORMATION
    ____________________________________________________________________________________________________ _____
    Computer name: FRA
    OS version: Windows 8 , 6.2, build: 9200 (x64)
    Hardware: GA-MA790X-UD4, Gigabyte Technology Co., Ltd.
    CPU: AuthenticAMD AMD Phenom(tm) II X3 720 Processor
    Logical processors: 3
    Processor groups: 1
    RAM: 4093 MB total




    ____________________________________________________________________________________________________ _____
    CPU SPEED
    ____________________________________________________________________________________________________ _____
    Reported CPU speed: 3416.0 MHz
    Measured CPU speed: 4263.0 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 (s): 9757.143221
    Average measured interrupt to process latency (s): 4.459461


    Highest measured interrupt to DPC latency (s): 2463.794838
    Average measured interrupt to DPC latency (s): 1.825950




    ____________________________________________________________________________________________________ _____
    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): 212.328454
    Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation


    Highest reported total ISR routine time (%): 0.466138
    Driver with highest ISR total time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation


    Total time spent in ISRs (%) 0.545933


    ISR count (execution time <250 s): 9617021
    ISR count (execution time 250-500 s): 0
    ISR count (execution time 500-999 s): 0
    ISR count (execution time 1000-1999 s): 0
    ISR count (execution time 2000-3999 s): 0
    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): 11078.500585
    Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation


    Highest reported total DPC routine time (%): 0.523892
    Driver with highest DPC total execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation


    Total time spent in DPCs (%) 1.819127


    DPC count (execution time <250 s): 18564593
    DPC count (execution time 250-500 s): 0
    DPC count (execution time 500-999 s): 15634
    DPC count (execution time 1000-1999 s): 135
    DPC count (execution time 2000-3999 s): 91
    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: explorer.exe


    Total number of hard pagefaults 195030
    Hard pagefault count of hardest hit process: 104767
    Highest hard pagefault resolution time (s): 5105052678276.250
    Total time spent in hard pagefaults (%): 46860.369551
    Number of processes hit: 60




    ____________________________________________________________________________________________________ _____
    PER CPU DATA
    ____________________________________________________________________________________________________ _____
    CPU 0 Interrupt cycle time (s): 115.755187
    CPU 0 ISR highest execution time (s): 181.387881
    CPU 0 ISR total execution time (s): 1.442597
    CPU 0 ISR count: 206683
    CPU 0 DPC highest execution time (s): 1715.539520
    CPU 0 DPC total execution time (s): 41.631850
    CPU 0 DPC count: 10542646
    ____________________________________________________________________________________________________ _____
    CPU 1 Interrupt cycle time (s): 61.898710
    CPU 1 ISR highest execution time (s): 204.885246
    CPU 1 ISR total execution time (s): 13.880212
    CPU 1 ISR count: 2256049
    CPU 1 DPC highest execution time (s): 3824.185304
    CPU 1 DPC total execution time (s): 15.113963
    CPU 1 DPC count: 844909
    ____________________________________________________________________________________________________ _____
    CPU 2 Interrupt cycle time (s): 219.914542
    CPU 2 ISR highest execution time (s): 212.328454
    CPU 2 ISR total execution time (s): 44.163342
    CPU 2 ISR count: 7154289
    CPU 2 DPC highest execution time (s): 11078.500585
    CPU 2 DPC total execution time (s): 141.470492
    CPU 2 DPC count: 7192919
    ____________________________________________________________________________________________________ _____
    Attached Thumbnails Attached Thumbnails driverslist.JPG   processeslist.JPG  

      My System SpecsSystem Spec

  2. #2


    Posts : 1,883
    7601.18247.x86fre.win7sp1


    Uninstall Norton with the tool they offer in Safe Mode.

    You'll be golden. (Norton will do that to ya, no doubt and a dutch.)

    Replace it with MSE and turn on the Windows Firewall service. MSE install can do that for you, or you can do it manually with services.msc.

    Ensure Razer driver/software is latest.
      My System SpecsSystem Spec

  3. #3


    Windows Defender, which was called Microsoft Security Essentials, is built into Windows 8. Most users do not need a 3rd party Antivirus.

    What is the problem or reason you ran the Latency Monitor?
      My System SpecsSystem Spec

Let's take a look at my DPC (LatencyMon)
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