Windows 10: High DPC latency from acpi.sys causing audio clicks and pops

I have audio popping. All drivers and BIOS are latest.

LatencyMon stats:

_________________________________________________________________________________________________________
CONCLUSION
_________________________________________________________________________________________________________
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 0:01:00 h:mm:ss on all processors.


_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: DESKTOP-MD024CC
OS version: Windows 10, 10.0, version 2009, build: 19042 x64
Hardware: Inspiron 3584, Dell Inc.
CPU: GenuineIntel IntelR CoreTM i3-7020U CPU @ 2.30GHz
Logical processors: 4
Processor groups: 1
RAM: 8054 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: 2407,30
Average measured interrupt to process latency µs: 14,744584

Highest measured interrupt to DPC latency µs: 2364,80
Average measured interrupt to DPC latency µs: 4,004081


_________________________________________________________________________________________________________
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: 133,362847
Driver with highest ISR routine execution time: ACPI.sys - ACPI драйвер для NT, Microsoft Corporation

Highest reported total ISR routine time %: 0,009054
Driver with highest ISR total time: ACPI.sys - ACPI драйвер для NT, Microsoft Corporation

Total time spent in ISRs % 0,010966

ISR count execution time <250 µs: 1100
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


_________________________________________________________________________________________________________
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: 2704,015625
Driver with highest DPC routine execution time: ndis.sys - NDIS Network Driver Interface Specification, Microsoft
Corporation

Highest reported total DPC routine time %: 0,025015
Driver with highest DPC total execution time: ACPI.sys - ACPI драйвер для NT, Microsoft Corporation

Total time spent in DPCs % 0,143292

DPC count execution time <250 µs: 21448
DPC count execution time 250-500 µs: 0
DPC count execution time 500-10000 µs: 155
DPC count execution time 1000-2000 µs: 6
DPC count execution time 2000-4000 µs: 15
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.


Process with highest pagefault count: none

Total number of hard pagefaults 0
Hard pagefault count of hardest hit process: 0
Number of processes hit: 0


_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time s: 0,638998
CPU 0 ISR highest execution time µs: 133,362847
CPU 0 ISR total execution time s: 0,026327
CPU 0 ISR count: 1100
CPU 0 DPC highest execution time µs: 2704,015625
CPU 0 DPC total execution time s: 0,327017
CPU 0 DPC count: 21047
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time s: 0,200523
CPU 1 ISR highest execution time µs: 0,0
CPU 1 ISR total execution time s: 0,0
CPU 1 ISR count: 0
CPU 1 DPC highest execution time µs: 128,699653
CPU 1 DPC total execution time s: 0,002876
CPU 1 DPC count: 218
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time s: 0,144217
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: 2529,246528
CPU 2 DPC total execution time s: 0,009088
CPU 2 DPC count: 198
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time s: 0,152046
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: 2525,888889
CPU 3 DPC total execution time s: 0,005011
CPU 3 DPC count: 161
_________________________________________________________________________________________________________

:)

 

High DPC latency

I use my Dell XPS for recording and live playback but the system suffers from high DPC latency caused by ACPI driver.

I removed Dell audio drivers and installed those from RealTek with no avail. Latency is an issue because I need this computer for live recording. Please your advice.

 

High DPC Latency caused by wdf01000.sys

Hello,

I am posting this regarding a problem that I ran across in my laptop at the beginning of august 2019, the problem is that I am getting high DPC Latency levels that are apparently caused by wdf01000.sys according to the latency checking
program, latencymon.

I really want to know if there is a fix since I have browsed a wide range of sites trying to find a fix, I could not find any. And also my keyboard stopped working for some reason, if its ok I would like to find a fix for that, but
I prioritize fixing the high latency over the keyboard.

Thank you for taking your time to read this.

 

High DPC latency from acpi.sys causing audio clicks and pops

Hi thanks, yes I did go through all of those articles and have gone through their recommended actions in an attempt to resolve this (summarized in my list of things I've tried) as well as basic sound functionality as you mention. I have started several
times from a clean Windows 10 install, with various builds tried. This is a more a more fundamental issue with the way that ACPI.sys impacts DPC latency on essentially all Windows notebooks. This impacts users of audio recording software, high-end gamers,
and other users with latency-sensitive applications.