Windows 10: DPC Latency Issues? APCI Driver for NT

Discus and support DPC Latency Issues? APCI Driver for NT in Windows 10 Drivers and Hardware to solve the problem; Hello, I'm working on trouble shooting an audio interface on my laptop. .OS Name Microsoft Windows 10 Home Version 10.0.18362 Build 18362 Other... Discussion in 'Windows 10 Drivers and Hardware' started by showmefar, Nov 4, 2019.

  1. SHOWMEFAR
    showmefar Win User

    DPC Latency Issues? APCI Driver for NT


    Hello,


    I'm working on trouble shooting an audio interface on my laptop.


    .OS Name Microsoft Windows 10 Home

    Version 10.0.18362 Build 18362

    Other OS Description Not Available

    OS Manufacturer Microsoft Corporation


    System Manufacturer HP

    System Model OMEN by HP Laptop 15-dc0xxx

    System Type x64-based PC


    Processor Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz, 2208 Mhz, 6 Core(s), 12 Logical Processor(s)

    BIOS Version/Date AMI F.09, 6/11/2019

    Installed Physical Memory (RAM) 32.0 GB






    I've been having a lot of audio drop outs\disconnections. I've tried a lot of the usual troubleshooting (adjusted power save settings,,updating firmware/ drivers.) The manufacturer of the interface suggested I'm having DPC Latency issues. However they told me to contact microsoft tech support. i tried and they said there services were down temporarily DPC Latency Issues? APCI Driver for NT :p


    I ran a Latency monitor and generated this report (listed below). Anyone know where i go from here on this one


    Thank you in advanced DPC Latency Issues? APCI Driver for NT :D




    _________________________________________________________________________________________________________

    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 0:21:27 (h:mm:ss) on all processors.





    _________________________________________________________________________________________________________

    SYSTEM INFORMATION

    _________________________________________________________________________________________________________

    Computer name: LAPTOP-3VG3IKO1

    OS version: Windows 10 , 10.0, version 1903, build: 18362 (x64)

    Hardware: OMEN by HP Laptop 15-dc0xxx, HP, 84DB

    CPU: GenuineIntel Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz

    Logical processors: 12

    Processor groups: 1

    RAM: 32643 MB total





    _________________________________________________________________________________________________________

    CPU SPEED

    _________________________________________________________________________________________________________

    Reported CPU speed: 2208 MHz



    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 (µs): 4689.70

    Average measured interrupt to process latency (µs): 7.332006



    Highest measured interrupt to DPC latency (µs): 4668.90

    Average measured interrupt to DPC latency (µs): 3.827375





    _________________________________________________________________________________________________________

    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 (µs): 2215.725543

    Driver with highest ISR routine execution time: ACPI.sys - ACPI Driver for NT, Microsoft Corporation



    Highest reported total ISR routine time (%): 0.105863

    Driver with highest ISR total time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation



    Total time spent in ISRs (%) 0.124861



    ISR count (execution time <250 µs): 427198

    ISR count (execution time 250-500 µs): 0

    ISR count (execution time 500-999 µs): 772

    ISR count (execution time 1000-1999 µs): 16

    ISR count (execution time 2000-3999 µs): 1

    ISR count (execution time >=4000 µs): 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 (µs): 4951.003623

    Driver with highest DPC routine execution time: ACPI.sys - ACPI Driver for NT, Microsoft Corporation



    Highest reported total DPC routine time (%): 0.064940

    Driver with highest DPC total execution time: ACPI.sys - ACPI Driver for NT, Microsoft Corporation



    Total time spent in DPCs (%) 0.160781



    DPC count (execution time <250 µs): 3466688

    DPC count (execution time 250-500 µs): 0

    DPC count (execution time 500-999 µs): 25629

    DPC count (execution time 1000-1999 µs): 234

    DPC count (execution time 2000-3999 µs): 7

    DPC count (execution time >=4000 µs): 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: aswidsagent.exe



    Total number of hard pagefaults 9782

    Hard pagefault count of hardest hit process: 5789

    Number of processes hit: 55





    _________________________________________________________________________________________________________

    PER CPU DATA

    _________________________________________________________________________________________________________

    CPU 0 Interrupt cycle time (s): 103.305379

    CPU 0 ISR highest execution time (µs): 2215.725543

    CPU 0 ISR total execution time (s): 18.100338

    CPU 0 ISR count: 322167

    CPU 0 DPC highest execution time (µs): 4951.003623

    CPU 0 DPC total execution time (s): 23.189532

    CPU 0 DPC count: 3248133

    _________________________________________________________________________________________________________

    CPU 1 Interrupt cycle time (s): 93.387618

    CPU 1 ISR highest execution time (µs): 945.293478

    CPU 1 ISR total execution time (s): 0.910654

    CPU 1 ISR count: 12817

    CPU 1 DPC highest execution time (µs): 1798.274457

    CPU 1 DPC total execution time (s): 0.746101

    CPU 1 DPC count: 33922

    _________________________________________________________________________________________________________

    CPU 2 Interrupt cycle time (s): 56.543911

    CPU 2 ISR highest execution time (µs): 882.185688

    CPU 2 ISR total execution time (s): 0.222598

    CPU 2 ISR count: 3476

    CPU 2 DPC highest execution time (µs): 802.066123

    CPU 2 DPC total execution time (s): 0.220013

    CPU 2 DPC count: 19089

    _________________________________________________________________________________________________________

    CPU 3 Interrupt cycle time (s): 53.347863

    CPU 3 ISR highest execution time (µs): 255.488225

    CPU 3 ISR total execution time (s): 0.001554

    CPU 3 ISR count: 69

    CPU 3 DPC highest execution time (µs): 220.083333

    CPU 3 DPC total execution time (s): 0.004701

    CPU 3 DPC count: 857

    _________________________________________________________________________________________________________

    CPU 4 Interrupt cycle time (s): 37.814304

    CPU 4 ISR highest execution time (µs): 36.418478

    CPU 4 ISR total execution time (s): 0.000077

    CPU 4 ISR count: 33

    CPU 4 DPC highest execution time (µs): 172.794384

    CPU 4 DPC total execution time (s): 0.013037

    CPU 4 DPC count: 6978

    _________________________________________________________________________________________________________

    CPU 5 Interrupt cycle time (s): 38.171434

    CPU 5 ISR highest execution time (µs): 0.0

    CPU 5 ISR total execution time (s): 0.0

    CPU 5 ISR count: 0

    CPU 5 DPC highest execution time (µs): 228.501812

    CPU 5 DPC total execution time (s): 0.002979

    CPU 5 DPC count: 601

    _________________________________________________________________________________________________________

    CPU 6 Interrupt cycle time (s): 42.463482

    CPU 6 ISR highest execution time (µs): 0.0

    CPU 6 ISR total execution time (s): 0.0

    CPU 6 ISR count: 0

    CPU 6 DPC highest execution time (µs): 249.101449

    CPU 6 DPC total execution time (s): 0.009177

    CPU 6 DPC count: 1703

    _________________________________________________________________________________________________________

    CPU 7 Interrupt cycle time (s): 42.261761

    CPU 7 ISR highest execution time (µs): 0.0

    CPU 7 ISR total execution time (s): 0.0

    CPU 7 ISR count: 0

    CPU 7 DPC highest execution time (µs): 268.133152

    CPU 7 DPC total execution time (s): 0.013936

    CPU 7 DPC count: 3133

    _________________________________________________________________________________________________________

    CPU 8 Interrupt cycle time (s): 93.690153

    CPU 8 ISR highest execution time (µs): 64.101449

    CPU 8 ISR total execution time (s): 0.005193

    CPU 8 ISR count: 5317

    CPU 8 DPC highest execution time (µs): 309.924819

    CPU 8 DPC total execution time (s): 0.010380

    CPU 8 DPC count: 1663

    _________________________________________________________________________________________________________

    CPU 9 Interrupt cycle time (s): 28.884591

    CPU 9 ISR highest execution time (µs): 58.512681

    CPU 9 ISR total execution time (s): 0.054909

    CPU 9 ISR count: 81914

    CPU 9 DPC highest execution time (µs): 305.535326

    CPU 9 DPC total execution time (s): 0.578048

    CPU 9 DPC count: 167043

    _________________________________________________________________________________________________________

    CPU 10 Interrupt cycle time (s): 83.118980

    CPU 10 ISR highest execution time (µs): 60.822464

    CPU 10 ISR total execution time (s): 0.001245

    CPU 10 ISR count: 1276

    CPU 10 DPC highest execution time (µs): 285.726449

    CPU 10 DPC total execution time (s): 0.054756

    CPU 10 DPC count: 8545

    _________________________________________________________________________________________________________

    CPU 11 Interrupt cycle time (s): 77.979066

    CPU 11 ISR highest execution time (µs): 52.637681

    CPU 11 ISR total execution time (s): 0.000767

    CPU 11 ISR count: 918

    CPU 11 DPC highest execution time (µs): 228.122283

    CPU 11 DPC total execution time (s): 0.006072

    CPU 11 DPC count: 893

    _________________________________________________________________________________________________________

    :)
     
    showmefar, Nov 4, 2019
    #1
  2. SPIRITX MS MVP
    SpiritX MS MVP Win User

    DPC Latency High

    Hi,

    Check these:

    Solving DPC Latency Issues - Download Latency Monitor and DPC Latency Checker

    https://www.sweetwater.com/sweetcare/articles/solving-dpc-latency-issues/

    DPC Latency Checker

    Troubleshoot Driver Problems Using DPC Latency Checker - Windows Tutorials

    DPC Latency Checker - Download

    DPC Latency Checker

    Hope this helps.

    --------------------------------------------------------------------------------------------

    Rob Brown -
    Microsoft MVP     <- profile - Windows and Devices for IT : Bicycle - Mark Twain said it right.
     
    SpiritX MS MVP, Nov 4, 2019
    #2
  3. CHAUNDRARADDATZ
    ChaundraRaddatz Win User
    High DPC latency

    I use my Dell XPS for recording and live playback but the system suffers from high DPC latency caused by ACPI driver.

    I removed Dell audio drivers and installed those from RealTek with no avail. Latency is an issue because I need this computer for live recording. Please your advice.
     
    ChaundraRaddatz, Nov 4, 2019
    #3
  4. RICKBUELTMANN
    rickbueltmann Win User

    DPC Latency Issues? APCI Driver for NT

    Sound Latency Issues

    I have recently run into sound latency issues and think recent updates have caused this as I've successfully used Ableton for 2+ years with no sound crackling, dropouts or popping. I just restored Windows and its still happening. Ran latencymon and get the
    feedback that issue is storport.sys. Any ideas how to fix? Latencymon info:

    _________________________________________________________________________________________________________

    SYSTEM INFORMATION

    _________________________________________________________________________________________________________

    Computer name: LENOVO-PC

    OS version: Windows 10 , 10.0, build: 17134 (x64)

    Hardware: 20238, LENOVO, INVALID

    CPU: GenuineIntel Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz

    Logical processors: 8

    Processor groups: 1

    RAM: 8104 MB total

    _________________________________________________________________________________________________________

    CPU SPEED

    _________________________________________________________________________________________________________

    Reported CPU speed: 2394 MHz
    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 (µs): 105149.492355

    Average measured interrupt to process latency (µs): 30.901791
    Highest measured interrupt to DPC latency (µs): 105124.688509

    Average measured interrupt to DPC latency (µs): 28.102392

    _________________________________________________________________________________________________________

    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 (µs): 105324.005013

    Driver with highest DPC routine execution time: storport.sys - Microsoft Storage Port Driver, Microsoft Corporation
    Highest reported total DPC routine time (%): 1.095332

    Driver with highest DPC total execution time: storport.sys - Microsoft Storage Port Driver, Microsoft Corporation
    Total time spent in DPCs (%) 1.129141
    DPC count (execution time <250 µs): 60801

    DPC count (execution time 250-500 µs): 0

    DPC count (execution time 500-999 µs): 0

    DPC count (execution time 1000-1999 µs): 0

    DPC count (execution time 2000-3999 µs): 0

    DPC count (execution time >=4000 µs): 0
     
    rickbueltmann, Nov 4, 2019
    #4
Thema:

DPC Latency Issues? APCI Driver for NT

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