DPC Latency - Hard pagefaults - Driver errors

  • Thread starter Thread starter NicolasHaquin
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NicolasHaquin

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Hello I have been experiencing audio pops, drop outs (from any application) as well as lagging speeds whilst performing simple tasks. (such as transfering a small file from one place to another)


Hopefully someone can help out, this problem has been going for a couple of months now!


I use a Focusrite Clarett4PreUSB audio interface (which runs fine with my macbook) and have been through all the technical help steps focusrite support could provide already.


Here are the results from a Latency Mon test:


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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. 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 0:26:31 (h:mm:ss) on all processors.

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SYSTEM INFORMATION

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Computer name: DESKTOP-T33EE6H

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

Hardware: Z390 UD, Gigabyte Technology Co., Ltd.

CPU: GenuineIntel Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz

Logical processors: 8

Processor groups: 1

RAM: 16314 MB total





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CPU SPEED

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Reported CPU speed: 360 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): 1233.40

Average measured interrupt to process latency (µs): 3.688350



Highest measured interrupt to DPC latency (µs): 1210.30

Average measured interrupt to DPC latency (µs): 1.585657





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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): 340.790

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



Highest reported total ISR routine time (%): 0.102389

Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation



Total time spent in ISRs (%) 0.104461



ISR count (execution time <250 µs): 610779

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

ISR count (execution time 500-1000 µs): 18

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): 2183.281667

Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 460.89 , NVIDIA Corporation



Highest reported total DPC routine time (%): 0.095669

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



Total time spent in DPCs (%) 0.184010



DPC count (execution time <250 µs): 4601294

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

DPC count (execution time 500-10000 µs): 3033

DPC count (execution time 1000-2000 µs): 16

DPC count (execution time 2000-4000 µs): 1

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: ableton index.exe



Total number of hard pagefaults 90252

Hard pagefault count of hardest hit process: 36346

Number of processes hit: 77





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PER CPU DATA

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CPU 0 Interrupt cycle time (s): 87.359210

CPU 0 ISR highest execution time (µs): 340.790

CPU 0 ISR total execution time (s): 13.180104

CPU 0 ISR count: 604037

CPU 0 DPC highest execution time (µs): 2183.281667

CPU 0 DPC total execution time (s): 22.736390

CPU 0 DPC count: 4458528

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CPU 1 Interrupt cycle time (s): 35.053650

CPU 1 ISR highest execution time (µs): 264.378333

CPU 1 ISR total execution time (s): 0.122063

CPU 1 ISR count: 6760

CPU 1 DPC highest execution time (µs): 304.736667

CPU 1 DPC total execution time (s): 0.416349

CPU 1 DPC count: 75342

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CPU 2 Interrupt cycle time (s): 38.345783

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): 164.820556

CPU 2 DPC total execution time (s): 0.077217

CPU 2 DPC count: 18728

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CPU 3 Interrupt cycle time (s): 30.988953

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): 189.638333

CPU 3 DPC total execution time (s): 0.054166

CPU 3 DPC count: 14477

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CPU 4 Interrupt cycle time (s): 28.483644

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): 161.503889

CPU 4 DPC total execution time (s): 0.043427

CPU 4 DPC count: 9817

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CPU 5 Interrupt cycle time (s): 26.400134

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): 122.7350

CPU 5 DPC total execution time (s): 0.038478

CPU 5 DPC count: 11557

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CPU 6 Interrupt cycle time (s): 26.642325

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): 191.718889

CPU 6 DPC total execution time (s): 0.031024

CPU 6 DPC count: 7916

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CPU 7 Interrupt cycle time (s): 26.867935

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): 119.570

CPU 7 DPC total execution time (s): 0.035063

CPU 7 DPC count: 7979

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