high DPC latency makes my audio stutter (mostly when using an audio interface)

[rgrgerg]

Hi, I started using this pc mostly for music production

lately i've noticed pops and crackles coming from my pc audio (not only my DAW audio, but also youtube, windows media player and so on...) making producing almost impossible..

i'm struggling with this problem a lot and lost too many hours trying to figure out what the problem was, these are the processes that mostly cause DPC:

rspLLL64.sys

ndis.sys (this is the most problematic one)

ntoskml.exe

dxgkrnl

nvlddmkm.sys

CLASSPNP.SYS (not always)

tried a clean windows install, i even resetted my pc... and nothing worked (right now my pc i completely empty and has all the factory drivers)

i also noticed that cpu works at 4 GHz (with 2,20 GHz base speed) even without opnening apps (dont know if this is a related issue)

for ndis.sys:

i tried to disable wifi and it helps, also tried to disable ipv6 but nothing changes

here's what latencymon says:

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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. 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 0:40:06 (h:mm:ss) on all processors.

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SYSTEM INFORMATION

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Computer name: ....

OS version: Windows 11, 10.0, version 2009, build: 22631 (x64)

Hardware: Victus by HP 15L Gaming Desktop TG02-0xxx, HP

BIOS: F.25

CPU: GenuineIntel 12th Gen Intel(R) Core(TM) i5-12400F

Logical processors: 12

Processor groups: 1

Processor group size: 12

RAM: 16139 MB total

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CPU SPEED

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Reported CPU speed (WMI): 250 MHz

Reported CPU speed (registry): 2496 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 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): 10021,30

Average measured interrupt to DPC latency (µs): 5,556890

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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): 147,872596

Driver with highest ISR routine execution time: Wdf01000.sys - Runtime framework driver modalità kernel, Microsoft Corporation

Highest reported total ISR routine time (%): 0,000057

Driver with highest ISR total time: Wdf01000.sys - Runtime framework driver modalità kernel, Microsoft Corporation

Total time spent in ISRs (%) 0,000057

ISR count (execution time <250 µs): 6333

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): 1678,225962

Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 560.94 , NVIDIA Corporation

Highest reported total DPC routine time (%): 0,055849

Driver with highest DPC total execution time: storport.sys - Microsoft Storage Port Driver, Microsoft Corporation

Total time spent in DPCs (%) 0,117821

DPC count (execution time <250 µs): 15072832

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

DPC count (execution time 500-10000 µs): 2480

DPC count (execution time 1000-2000 µs): 2

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: msmpeng.exe

Total number of hard pagefaults 48880

Hard pagefault count of hardest hit process: 14722

Number of processes hit: 89

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PER CPU DATA

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CPU 0 Interrupt cycle time (s): 95,640806

CPU 0 ISR highest execution time (µs): 147,872596

CPU 0 ISR total execution time (s): 0,016324

CPU 0 ISR count: 6241

CPU 0 DPC highest execution time (µs): 1678,225962

CPU 0 DPC total execution time (s): 16,475048

CPU 0 DPC count: 6154939

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CPU 1 Interrupt cycle time (s): 92,466538

CPU 1 ISR highest execution time (µs): 6,844952

CPU 1 ISR total execution time (s): 0,000037

CPU 1 ISR count: 6

CPU 1 DPC highest execution time (µs): 574,6250

CPU 1 DPC total execution time (s): 7,798257

CPU 1 DPC count: 3975115

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CPU 2 Interrupt cycle time (s): 50,032204

CPU 2 ISR highest execution time (µs): 5,447917

CPU 2 ISR total execution time (s): 0,000196

CPU 2 ISR count: 85

CPU 2 DPC highest execution time (µs): 709,526843

CPU 2 DPC total execution time (s): 5,298907

CPU 2 DPC count: 2580852

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CPU 3 Interrupt cycle time (s): 55,309432

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): 554,510016

CPU 3 DPC total execution time (s): 3,044166

CPU 3 DPC count: 1715869

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CPU 4 Interrupt cycle time (s): 15,475049

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): 487,667869

CPU 4 DPC total execution time (s): 0,635418

CPU 4 DPC count: 321967

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CPU 5 Interrupt cycle time (s): 15,380906

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): 532,622997

CPU 5 DPC total execution time (s): 0,341148

CPU 5 DPC count: 163843

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CPU 6 Interrupt cycle time (s): 9,671858

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): 160,688301

CPU 6 DPC total execution time (s): 0,137462

CPU 6 DPC count: 57581

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CPU 7 Interrupt cycle time (s): 9,846758

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): 494,424679

CPU 7 DPC total execution time (s): 0,124971

CPU 7 DPC count: 45775

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CPU 8 Interrupt cycle time (s): 7,710212

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): 263,504407

CPU 8 DPC total execution time (s): 0,055194

CPU 8 DPC count: 21410

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CPU 9 Interrupt cycle time (s): 7,716557

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): 100,584135

CPU 9 DPC total execution time (s): 0,028372

CPU 9 DPC count: 10055

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CPU 10 Interrupt cycle time (s): 8,072240

CPU 10 ISR highest execution time (µs): 1,990385

CPU 10 ISR total execution time (s): 0,000002

CPU 10 ISR count: 1

CPU 10 DPC highest execution time (µs): 271,932692

CPU 10 DPC total execution time (s): 0,053843

CPU 10 DPC count: 17084

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CPU 11 Interrupt cycle time (s): 8,250250

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): 544,917067

CPU 11 DPC total execution time (s): 0,036765

CPU 11 DPC count: 10824

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[Nal_NR]

Hi @rgrgerg,

Welcome to the HP Support Community. 

I'd be glad to help you! 

Splendid analysis and remarkable patience were shown. It is immensely appreciated.

This might require one-on-one interaction via remote assistance to fix the issue. I recommend you contact phone support.

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