Wdf01000.sys latency probelm

Hi,


I have a self-built PC Ryzen 5 1600, 8 Gb Ram, Radeon RX 470, 256Gb NVMe SSD on which Windows 10 Education Edition is running, 2 TB HDD for data storing and use a Focusrite Scarlett 2i2 3rd Gen as my USB sound card for Audio Recording, Mixing and Mastering.

I searched trough the Internet quite a lot and found many people with the same problem.


My audio sometimes cracked up and I thought "well, that sometimes happens, don't worry about it". After installing various updates for Windows and getting a 4K Monitor, the cracking and popping got worse. Firstly, my suspicion was, that the Focusrite sound card degraded after only 1 year of use which happened to people I know. However, checking with my Laptop and various other Laptops from friends, none had the same issue. Then I thought my GPU was the problem, since it was an already used GPU when I bought it and I had trouble with frame rate drops, which didn't occur beforehand. In the end, I fiddled with the driver software and my GPU worked properly again, but the sound problem remained.


Also, an absolutely weird and infuriating bug I encountered: When music was played via the Spotify standalone program my PC crashed randomly on me! Sometimes after 30 seconds, sometimes after an hour. Blue screen.

Didn't happen when I was listening through the browser. Needless to say that I reinstalled all my drivers a thousand times.


Long story, short: I found LatencyMon and there my hope was restored. "I'm not crazy, it's not my interface, not my GPU, only some weird driver I need to update.Wdf01000.sys


Little did I know that hell just began warming up for me.

Countless BIOS updates, reinstalling Windows 4 times, trying to fix things in the registry, power management, etc.


Nothing helped. Except once: The first time I updated the Bios and made some very specific changes in it according to a Focusrite recommendation, worked for half a week. It fixed it for me as long as I didn't turn off the PC. Of course, I tried to recreate that exact same pattern, but it never worked afterwards again.


I'm helpless. I believe that it worked without a problem before Windows 10 1803 or 1809. I really don't want to go back and use an old version to make it happen, since one day no security updates are going to be released for these versions.


If my point didn't come across, I'm frustrated... It worked before. Hardware didn't change, only software and I have a very high suspicion, that it's not the third party drivers since it's working just fine on other devices also on newest update of Windows 10.

I leave my LatencyMon Log here and hope someone might have an idea that I didn't try yet.






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CONCLUSION
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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 0:31:37 h:mm:ss on all processors.


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SYSTEM INFORMATION
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Computer name: DESKTOP-FE3AKP9
OS version: Windows 10 , 10.0, build: 18363 x64
Hardware: ASRock, A320M-DGS
CPU: AuthenticAMD AMD Ryzen 5 1600 Six-Core Processor
Logical processors: 12
Processor groups: 1
RAM: 8123 MB total


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CPU SPEED
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Reported CPU speed: 320 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.



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MEASURED INTERRUPT TO DPC LATENCIES
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The interrupt to DPC latency reflects the measured interval in which a DPC could execute in response to a hardware request from the moment the interrupt service routine started execution.

Highest measured interrupt to DPC latency µs: 22089,50
Average measured interrupt to DPC latency µs: 5,547894


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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: 2891,320
Driver with highest ISR routine execution time: Wdf01000.sys - Kernelmodustreiber-Frameworklaufzeit, Microsoft Corporation

Highest reported total ISR routine time %: 0,003158
Driver with highest ISR total time: Wdf01000.sys - Kernelmodustreiber-Frameworklaufzeit, Microsoft Corporation

Total time spent in ISRs % 0,003158

ISR count execution time <250 µs: 685194
ISR count execution time 250-500 µs: 0
ISR count execution time 500-999 µs: 6
ISR count execution time 1000-1999 µs: 1
ISR count execution time 2000-3999 µs: 3
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: 37471,310
Driver with highest DPC routine execution time: Wdf01000.sys - Kernelmodustreiber-Frameworklaufzeit, Microsoft Corporation

Highest reported total DPC routine time %: 0,141642
Driver with highest DPC total execution time: Wdf01000.sys - Kernelmodustreiber-Frameworklaufzeit, Microsoft Corporation

Total time spent in DPCs % 0,214173

DPC count execution time <250 µs: 6039271
DPC count execution time 250-500 µs: 0
DPC count execution time 500-999 µs: 1113
DPC count execution time 1000-1999 µs: 322
DPC count execution time 2000-3999 µs: 257
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: svchost.exe

Total number of hard pagefaults 1203
Hard pagefault count of hardest hit process: 429
Number of processes hit: 42


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PER CPU DATA
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CPU 0 Interrupt cycle time s: 114,696639
CPU 0 ISR highest execution time µs: 2891,320
CPU 0 ISR total execution time s: 0,662509
CPU 0 ISR count: 620019
CPU 0 DPC highest execution time µs: 37471,310
CPU 0 DPC total execution time s: 48,120733
CPU 0 DPC count: 5963697
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CPU 1 Interrupt cycle time s: 61,720591
CPU 1 ISR highest execution time µs: 5,750
CPU 1 ISR total execution time s: 0,000690
CPU 1 ISR count: 612
CPU 1 DPC highest execution time µs: 7771,940
CPU 1 DPC total execution time s: 0,107783
CPU 1 DPC count: 6514
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CPU 2 Interrupt cycle time s: 48,352365
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: 9967,40
CPU 2 DPC total execution time s: 0,190206
CPU 2 DPC count: 24883
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CPU 3 Interrupt cycle time s: 59,727654
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: 3540,030
CPU 3 DPC total execution time s: 0,007677
CPU 3 DPC count: 1189
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CPU 4 Interrupt cycle time s: 49,539829
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: 2019,560
CPU 4 DPC total execution time s: 0,116292
CPU 4 DPC count: 14490
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CPU 5 Interrupt cycle time s: 63,669951
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: 1456,490
CPU 5 DPC total execution time s: 0,007875
CPU 5 DPC count: 615
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CPU 6 Interrupt cycle time s: 32,868697
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: 7753,370
CPU 6 DPC total execution time s: 0,082581
CPU 6 DPC count: 13929
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CPU 7 Interrupt cycle time s: 40,332984
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: 646,330
CPU 7 DPC total execution time s: 0,001804
CPU 7 DPC count: 180
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CPU 8 Interrupt cycle time s: 47,075436
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: 2521,980
CPU 8 DPC total execution time s: 0,068202
CPU 8 DPC count: 9389
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CPU 9 Interrupt cycle time s: 54,270543
CPU 9 ISR highest execution time µs: 0,0
CPU 9 ISR total execution time s: 0,0
CPU 9 ISR count: 0
CPU 9 DPC highest execution time µs: 30,350
CPU 9 DPC total execution time s: 0,000976
CPU 9 DPC count: 156
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CPU 10 Interrupt cycle time s: 48,830630
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: 6345,730
CPU 10 DPC total execution time s: 0,038580
CPU 10 DPC count: 4085
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CPU 11 Interrupt cycle time s: 56,949581
CPU 11 ISR highest execution time µs: 234,450
CPU 11 ISR total execution time s: 0,055876
CPU 11 ISR count: 64573
CPU 11 DPC highest execution time µs: 227,410
CPU 11 DPC total execution time s: 0,018780
CPU 11 DPC count: 2198
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