ndis.sys

Question

I recently purchased an audio interface and a microphone. I'm having lots of trouble with it though, as I hear a crackling noise when I listen to my computer audio through the interface (I don't have any issues listening to the microphone through the interface). Having run a performance monitoring company and sending over the results from it to the folks at Focusrite (the company who sold me the interface), I was told the following:

" It looks likendis.sys - Network Driver Interface Specification (NDIS), Microsoft Corporation is showing high DPC latency.

DPC stands for Deferred Procedure Call.  In its simplest form, it is the part of your Windows system that handles driver efficiency.  If there is a driver that is taking longer than normal to process, it may prevent other drivers from being processed in time.  The worst case is that it can cause your audio interface driver from responding in time and can cause clicks, pops, distortion and dropouts.

Since this is a Microsoft driver, we recommend contacting them for assistance: "

So here we are. Let me know if there's anything you can do to help me. I've been toiling at this issue with online tutorials and customer support for about a week now, and my sanity is beginning to deteriorate.

Best regards.

Answer 1

Please check for BIOS updates? reinstall all network drivers and motherboard drivers (if exist) from ASUS support site.

Do you have some third party antivirus or network related tools?

Answer 2

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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 0:20:52 (h:mm:ss) on all processors.

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SYSTEM INFORMATION

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Computer name: LAPTOP-16VKGCPT

OS version: Windows 10, 10.0, version 2009, build: 19042 (x64)

Hardware: VivoBook_ASUSLaptop X512FA_X512FA, ASUSTeK COMPUTER INC.

CPU: GenuineIntel Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz

Logical processors: 8

Processor groups: 1

RAM: 12139 MB total

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CPU SPEED

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Reported CPU speed: 1992 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.

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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): 1632.30

Average measured interrupt to process latency (µs): 5.939345

Highest measured interrupt to DPC latency (µs): 1619.50

Average measured interrupt to DPC latency (µs): 2.464265

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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): 183.281627

Driver with highest ISR routine execution time: i8042prt.sys - i8042 Port Driver, Microsoft Corporation

Highest reported total ISR routine time (%): 0.002348

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

Total time spent in ISRs (%) 0.004319

ISR count (execution time <250 µs): 121282

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

ISR count (execution time 500-1000 µs): 0

ISR count (execution time 1000-2000 µs): 0

ISR count (execution time 2000-4000 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): 1610.838353

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

Highest reported total DPC routine time (%): 0.065225

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

Total time spent in DPCs (%) 0.107823

DPC count (execution time <250 µs): 608596

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

DPC count (execution time 500-10000 µs): 1196

DPC count (execution time 1000-2000 µs): 5

DPC count (execution time 2000-4000 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: msedge.exe

Total number of hard pagefaults 1105

Hard pagefault count of hardest hit process: 268

Number of processes hit: 22

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PER CPU DATA

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CPU 0 Interrupt cycle time (s): 31.769337

CPU 0 ISR highest execution time (µs): 183.281627

CPU 0 ISR total execution time (s): 0.432633

CPU 0 ISR count: 121224

CPU 0 DPC highest execution time (µs): 1610.838353

CPU 0 DPC total execution time (s): 9.790865

CPU 0 DPC count: 491182

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CPU 1 Interrupt cycle time (s): 5.102318

CPU 1 ISR highest execution time (µs): 6.667671

CPU 1 ISR total execution time (s): 0.000098

CPU 1 ISR count: 58

CPU 1 DPC highest execution time (µs): 211.323795

CPU 1 DPC total execution time (s): 0.017140

CPU 1 DPC count: 2062

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CPU 2 Interrupt cycle time (s): 7.293357

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): 649.677209

CPU 2 DPC total execution time (s): 0.314056

CPU 2 DPC count: 36554

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CPU 3 Interrupt cycle time (s): 4.942563

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): 192.066265

CPU 3 DPC total execution time (s): 0.028884

CPU 3 DPC count: 3743

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CPU 4 Interrupt cycle time (s): 6.957293

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): 612.416667

CPU 4 DPC total execution time (s): 0.405399

CPU 4 DPC count: 48319

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CPU 5 Interrupt cycle time (s): 5.131556

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): 328.581325

CPU 5 DPC total execution time (s): 0.023426

CPU 5 DPC count: 2754

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CPU 6 Interrupt cycle time (s): 6.015835

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): 538.574297

CPU 6 DPC total execution time (s): 0.201448

CPU 6 DPC count: 22947

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CPU 7 Interrupt cycle time (s): 5.038340

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): 514.488454

CPU 7 DPC total execution time (s): 0.021527

CPU 7 DPC count: 2236

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Answer 3

Hi Halil,

My name is Igor, I have 12 Microsoft MVP awards. It's a pleasure for me to help others and I'll do all my best to help you. I'm sorry you have a problems.

Unfortunately seems the support just could not or did not want to solve your problem.

Please use LatencyMon tool and show the results of testing.