dpc latency and audio crackle

djandyw · Mar 7, 2017

Hi everyone i realy need some advice on fixing this issue with dpc latency. I can't use my computer right now because of the dpc latency the audio won't stop skipping here is my report from latency mon

I'm new to this dpc latency issue so any advice on troubleshooting it would be great. I even reformatted my computer and it's still crackling and skipping my audio.
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CONCLUSION
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Your system seems to be having difficulty handling real-time audio and other tasks. You may experience drop outs, clicks or pops due to buffer underruns. 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 0:00:44 (h:mm:ss) on all processors.

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SYSTEM INFORMATION
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Computer name: DESKTOP-UK20R46
OS version: Windows 8 , 6.2, build: 9200 (x64)
Hardware: MS-7A20, MSI, X99A GAMING PRO CARBON (MS-7A20)
CPU: GenuineIntel Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz
Logical processors: 12
Processor groups: 1
RAM: 32671 MB total

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CPU SPEED
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Reported CPU speed: 340 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.

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MEASURED INTERRUPT TO USER PROCESS LATENCIES
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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): 466.220685
Average measured interrupt to process latency (µs): 7.542309

Highest measured interrupt to DPC latency (µs): 463.208923
Average measured interrupt to DPC latency (µs): 3.786540

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REPORTED ISRs
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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): 134.430
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Highest reported total ISR routine time (%): 0.093051
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Total time spent in ISRs (%) 0.097497

ISR count (execution time <250 µs): 75523
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 0
ISR count (execution time 1000-1999 µs): 0
ISR count (execution time 2000-3999 µs): 0
ISR count (execution time >=4000 µs): 0

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REPORTED DPCs
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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): 1126.487353
Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 378.66 , NVIDIA Corporation

Highest reported total DPC routine time (%): 0.097787
Driver with highest DPC total execution time: ndis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation

Total time spent in DPCs (%) 0.377450

DPC count (execution time <250 µs): 1106915
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 6
DPC count (execution time 1000-1999 µs): 1
DPC count (execution time 2000-3999 µs): 0
DPC count (execution time >=4000 µs): 0

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REPORTED HARD PAGEFAULTS
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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: thunderbird.exe

Total number of hard pagefaults 199
Hard pagefault count of hardest hit process: 133
Highest hard pagefault resolution time (µs): 27153.552059
Total time spent in hard pagefaults (%): 0.028790
Number of processes hit: 12

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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 2.960393
CPU 0 ISR highest execution time (µs): 134.430
CPU 0 ISR total execution time (s): 0.459670
CPU 0 ISR count: 42762
CPU 0 DPC highest execution time (µs): 1126.487353
CPU 0 DPC total execution time (s): 1.171505
CPU 0 DPC count: 660617
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CPU 1 Interrupt cycle time (s): 0.570877
CPU 1 ISR highest execution time (µs): 88.272059
CPU 1 ISR total execution time (s): 0.046609
CPU 1 ISR count: 11711
CPU 1 DPC highest execution time (µs): 134.100882
CPU 1 DPC total execution time (s): 0.141989
CPU 1 DPC count: 34630
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CPU 2 Interrupt cycle time (s): 1.025451
CPU 2 ISR highest execution time (µs): 0.0
CPU 2 ISR total execution time (s): 0.0
CPU 2 ISR count: 0
CPU 2 DPC highest execution time (µs): 432.191765
CPU 2 DPC total execution time (s): 0.490478
CPU 2 DPC count: 353723
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CPU 3 Interrupt cycle time (s): 0.410361
CPU 3 ISR highest execution time (µs): 0.0
CPU 3 ISR total execution time (s): 0.0
CPU 3 ISR count: 0
CPU 3 DPC highest execution time (µs): 104.563529
CPU 3 DPC total execution time (s): 0.028547
CPU 3 DPC count: 9098
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CPU 4 Interrupt cycle time (s): 0.350164
CPU 4 ISR highest execution time (µs): 0.0
CPU 4 ISR total execution time (s): 0.0
CPU 4 ISR count: 0
CPU 4 DPC highest execution time (µs): 89.293529
CPU 4 DPC total execution time (s): 0.014542
CPU 4 DPC count: 7616
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CPU 5 Interrupt cycle time (s): 0.327007
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): 125.080
CPU 5 DPC total execution time (s): 0.021133
CPU 5 DPC count: 6288
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CPU 6 Interrupt cycle time (s): 0.372520
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): 113.990
CPU 6 DPC total execution time (s): 0.034791
CPU 6 DPC count: 7596
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CPU 7 Interrupt cycle time (s): 0.3370
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): 98.286471
CPU 7 DPC total execution time (s): 0.017832
CPU 7 DPC count: 4325
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CPU 8 Interrupt cycle time (s): 0.332420
CPU 8 ISR highest execution time (µs): 0.0
CPU 8 ISR total execution time (s): 0.0
CPU 8 ISR count: 0
CPU 8 DPC highest execution time (µs): 119.220
CPU 8 DPC total execution time (s): 0.025047
CPU 8 DPC count: 6641
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CPU 9 Interrupt cycle time (s): 0.308851
CPU 9 ISR highest execution time (µs): 65.189118
CPU 9 ISR total execution time (s): 0.008683
CPU 9 ISR count: 21050
CPU 9 DPC highest execution time (µs): 48.906471
CPU 9 DPC total execution time (s): 0.007978
CPU 9 DPC count: 3399
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CPU 10 Interrupt cycle time (s): 0.463647
CPU 10 ISR highest execution time (µs): 0.0
CPU 10 ISR total execution time (s): 0.0
CPU 10 ISR count: 0
CPU 10 DPC highest execution time (µs): 117.703235
CPU 10 DPC total execution time (s): 0.030198
CPU 10 DPC count: 10438
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CPU 11 Interrupt cycle time (s): 0.354711
CPU 11 ISR highest execution time (µs): 0.0
CPU 11 ISR total execution time (s): 0.0
CPU 11 ISR count: 0
CPU 11 DPC highest execution time (µs): 60.953824
CPU 11 DPC total execution time (s): 0.009575
CPU 11 DPC count: 2551
_________________________________________________________________________________________________________

djandyw · Mar 7, 2017

xilolee · Mar 15, 2017

Preamble

Read More:

Would you try these steps?

Left-click on Start, type directly msconfig, press enter.
Is the radio button on normal startup?
Advanced disk cleanup with cleanmgr:
- Open an elevated command prompt
- Type cleanmgr /sageset:1 and press enter.
- Select all the options, or leave unticked the ones you prefer.
- Type cleanmgr /sagerun:1 and press enter
- Let it work until it finishes.
Launch this command from an elevated command prompt:

dism /online /cleanup-image /checkhealth

Click to expand...

Do you get my same result?
Read More:
Code:

C:\>dism /online /cleanup-image /checkhealth Deployment Image Servicing and Management tool Version: 10.0.14393.0 Image Version: 10.0.14393.0 No component store corruption detected. The operation completed successfully.
If yes, go to the next point.
If no:

Read More:

try to run this command from an elevated command prompt and let it work until it finishes (it could last from 10 to 60 minutes):

dism /online /cleanup-image /restorehealth

Click to expand...
Launch this command from an elevated command prompt and let it work until it finishes (it could last from 10 to 60 minutes):

sfc /scannow

Click to expand...

If you get the following message:

Windows Resource Protection found corrupt files but was unable to fix some of them. Details are included in the CBS.Log %WinDir%\Logs\CBS\CBS.log

Click to expand...

Read Windows Update Forum Posting Instructions (click) and provide the necessary (and missing) informations to the experts. I.e., you should:
- export and zip/compress the entire CBS folder on your desktop
- open a new topic in the windows update sub-forum (in sysnative.com)
- attach that zipped file to that new topic
If the CBS compressed folder will be too large, you can check the second post on that thread (to use the sfcfix tool with a script) or you can use a (possibly fast) web service like MS OneDrive, Google Drive, DropBox, Box, Mega, Apple iCloud, Amazon Cloud Drive, and so forth...
Instead if you get the following messages, go to the next step:

Windows Resource Protection did not find any integrity violations
Windows Resource Protection found corrupt files and successfully repaired them. Details are included in the CBS.Log %WinDir%\Logs\CBS\CBS.log

Click to expand...
Defragment your system drive (using windows default defragmenter). Steps:
- Open an elevated command prompt
- Type defrag c: /h and press enter
- Wait until it finishes
Check your system partition, then post the result here. Steps:
- Open an elevated command prompt.
- Type chkdsk c: /b and press enter.
- You'll get:
  
  The type of the file system is NTFS.
  Cannot lock current drive.
  Chkdsk cannot run because the volume is in use by another
  process. Would you like to schedule this volume to be
  checked the next time the system restarts? (Y/N)
  
  Click to expand...
- Type Y and press enter.
- Then restart/reboot and wait until it finishes this check.
- To find chkdsk result:
  - Open an elevated command prompt
  - Copy/paste this command and press enter:
    Code:
    wevtutil qe application /c:1 /rd:true /f:text /q:"*[System[Provider[(@Name='Microsoft-Windows-Wininit')]]]" > "%userprofile%\desktop\ChkDskLOG.txt" & notepad "%userprofile%\desktop\ChkDskLOG.txt"
  - It should create chkdsklog.txt on your desktop and open it: paste its content here.
  - If the command won't work, type eventvwr, press enter, in the event viewer window double-left-click Windows Logs to expand it, left-click Application, double-left-click the information event with source wininit, copy its content and post it here.

If the problem persists:

Please provide answers for (answer the best that you can):
- System Manufacturer?
- Laptop or Desktop?
- Exact model number (if laptop, check label on bottom)
- OS ? (Windows 10, 8.1, 8, 7, Vista)
- x86 (32bit) or x64 (64bit)?
- Service pack?
- What was original installed OS on system?
- Is the OS an OEM version (came pre-installed on system) or full retail version (YOU purchased it from retailer)?
- Age of system? (hardware)
- Age of OS installation?
- Have you re-installed the OS?
- CPU
- RAM (brand, model, which slots are you using?)
- Video Card
- MotherBoard - (if NOT a laptop)
- Power Supply - brand & wattage (if laptop, skip this one)
- What security software are you using? (Firewall, antivirus, antimalware, antispyware, and so forth)
- Are you using proxy, vpn, ipfilters or similar software?
- Are you using Disk Image tools? (like daemon tools, alcohol 52% or 120%, virtual CloneDrive, roxio software)
- Are you currently under/overclocking? Are there overclocking software installed on your system?

Retrieve System Information, using speccy
1. Download Speccy portable - current version 1.30.730 (click), unzip/decompress it and put it on your desktop.
2. When the program opens, it will retrieve some information regarding your system.
3. Once it's done, select the File menu and choose Publish snapshot. Answer Yes to the confirmation message.
  (Or generate a log in your pc, if you prefer to not publish the snapshot for some reason)
4. On the next screen that comes up, choose the Copy to Clipboard button and paste this link in your next reply.
  (Or upload here the generated log, in case you didn't publish the snapshot)

Provide the SysnativeFileCollectionApp.zip
Check the first four steps in Blue Screen of Death (BSOD) Posting Instructions (click).
You can skip the perfmon report, if it shows problems (it is problematic for many users, starting from windows 8 to 10).

Facultative System information log (if previous point fails for some obscure reason)
The following command should generate a log, named MsInfo.nfo, on your desktop, after some time (few seconds or minutes).
Upload it here when windows finished its creation.
It obviously should be run from an elevated command prompt:
Code:
```
msinfo32 /nfo msinfo32 /nfo "%userprofile%\desktop\MsInfo.nfo"
```

Download and install the Windows Performance Toolkit on dev.windows.com - Windows Software Development Kit (SDK) for Windows 10 - sdksetup.exe 1.12MB (click):

Read More:

Click Download (adksetup.exe), save/run it and you'll see for first Specify location: leave it default or choose your preferred location, then click Next.

Read More:

Then you'll see Windows kits privacy: Niemiro said "you may opt in to CEIP if you so wish - it is not necessary, but you may wish to do so". Then click Next.

Read More:

Then you'll see License agreement: click Accept.

Read More:

Then you'll see Select the features you want to install: select only Windows Performance Toolkit and click Install.

Read More:

Then open an elevated command prompt and launch these commands:
Read More:
1. Set the path environment variable adding the windows performance toolkit path:
  
  Code:
  
  SET PATH=%PATH%;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\
  
  If you have chosen another path in specify location, you should provide THAT ONE.
2. You can generate a new trace with this command:
  
  Code:
  
  xperf -on DiagEasy
  
  Wait some time (Niemiro said: "Wait until the computer has gone through a period of stuttering slowness") and then:
  
  Code:
  
  xperf -d "%userprofile%\Desktop\trace.etl"
3. Upload/post the files. You can attach them here through GoogleDrive, OneDrive, DropBox or similar services.
You can also read the original tutorial/guide and its following posts for more information:

How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8) (click) (by Niemiro)

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dpc latency and audio crackle

djandyw

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