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High DPC Latency

Lately I've been experiencing weird audio glitches (clicking and popping sounds) when playing games. I've had this Laptop (Acer Nitro an515-54) for over 2 years and I can't remember having this problem ever before. I already updates my bios and it still happens. Then I was told to check on LatencyMon and found that there was a lot of DPC when the audio glitches happens. 

 

Anyone know any fix for high DPC issues??

 

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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. 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  1:06:49  (h:mm:ss) on all processors.


_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name:                                        LAPTOP-KAJ113H4
OS version:                                           Windows 10, 10.0, version 2009, build: 19043 (x64)
Hardware:                                             Nitro AN515-54, Acer
CPU:                                                  GenuineIntel Intel(R) Core(TM) i5-8300H CPU @ 2.30GHz
Logical processors:                                   8
Processor groups:                                     1
RAM:                                                  8029 MB total


_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed:                                   2304 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.


_________________________________________________________________________________________________________
MEASURED INTERRUPT TO USER PROCESS LATENCIES
_________________________________________________________________________________________________________
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):   925.60
Average measured interrupt to process latency (µs):   7.193795

Highest measured interrupt to DPC latency (µs):       914.20
Average measured interrupt to DPC latency (µs):       2.829797


_________________________________________________________________________________________________________
 REPORTED ISRs
_________________________________________________________________________________________________________
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):              442.458333
Driver with highest ISR routine execution time:       HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation

Highest reported total ISR routine time (%):          0.002146
Driver with highest ISR total time:                   HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation

Total time spent in ISRs (%)                          0.004087

ISR count (execution time <250 µs):                   413309
ISR count (execution time 250-500 µs):                0
ISR count (execution time 500-1000 µs):               2
ISR count (execution time 1000-2000 µs):              0
ISR count (execution time 2000-4000 µs):              0
ISR count (execution time >=4000 µs):                 0


_________________________________________________________________________________________________________
REPORTED DPCs
_________________________________________________________________________________________________________
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):              1155.360243
Driver with highest DPC routine execution time:       Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation

Highest reported total DPC routine time (%):          0.023809
Driver with highest DPC total execution time:         nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 471.96 , NVIDIA Corporation

Total time spent in DPCs (%)                          0.109977

DPC count (execution time <250 µs):                   3924835
DPC count (execution time 250-500 µs):                0
DPC count (execution time 500-10000 µs):              502
DPC count (execution time 1000-2000 µs):              1
DPC count (execution time 2000-4000 µs):              0
DPC count (execution time >=4000 µs):                 0


_________________________________________________________________________________________________________
 REPORTED HARD PAGEFAULTS
_________________________________________________________________________________________________________
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                       29745
Hard pagefault count of hardest hit process:          3201
Number of processes hit:                              214


_________________________________________________________________________________________________________
 PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s):                       99.708513
CPU 0 ISR highest execution time (µs):                372.625868
CPU 0 ISR total execution time (s):                   1.266827
CPU 0 ISR count:                                      399270
CPU 0 DPC highest execution time (µs):                1155.360243
CPU 0 DPC total execution time (s):                   29.394021
CPU 0 DPC count:                                      2721662
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s):                       15.891939
CPU 1 ISR highest execution time (µs):                442.458333
CPU 1 ISR total execution time (s):                   0.041389
CPU 1 ISR count:                                      13877
CPU 1 DPC highest execution time (µs):                433.489583
CPU 1 DPC total execution time (s):                   1.062633
CPU 1 DPC count:                                      117876
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s):                       18.235127
CPU 2 ISR highest execution time (µs):                67.206597
CPU 2 ISR total execution time (s):                   0.002529
CPU 2 ISR count:                                      162
CPU 2 DPC highest execution time (µs):                399.641493
CPU 2 DPC total execution time (s):                   1.739421
CPU 2 DPC count:                                      389723
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s):                       13.977688
CPU 3 ISR highest execution time (µs):                39.690104
CPU 3 ISR total execution time (s):                   0.000040
CPU 3 ISR count:                                      2
CPU 3 DPC highest execution time (µs):                187.905382
CPU 3 DPC total execution time (s):                   0.254157
CPU 3 DPC count:                                      52916
_________________________________________________________________________________________________________
CPU 4 Interrupt cycle time (s):                       19.983692
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):                404.108507
CPU 4 DPC total execution time (s):                   1.265849
CPU 4 DPC count:                                      306739
_________________________________________________________________________________________________________
CPU 5 Interrupt cycle time (s):                       12.034184
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):                401.073785
CPU 5 DPC total execution time (s):                   0.201946
CPU 5 DPC count:                                      40478
_________________________________________________________________________________________________________
CPU 6 Interrupt cycle time (s):                       18.823998
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):                372.400174
CPU 6 DPC total execution time (s):                   1.007822
CPU 6 DPC count:                                      228245
_________________________________________________________________________________________________________
CPU 7 Interrupt cycle time (s):                       11.855054
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):                185.427951
CPU 7 DPC total execution time (s):                   0.347785
CPU 7 DPC count:                                      67699
_________________________________________________________________________________________________________
 

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Did you do these test while doing something on pc? Doing something opening a program, watching a video or anything will skyrocket the DPC latency as expected

 

P.S you could disable HPET if that helps, I would recommend disabling it from bios if it has a option and from device manager under system devices (high precision event timer)

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