Windows 10: DPC latency fixes?

Over the last 3 weeks or so I've been having audio cracking and a sort of lag on screen for about a second or so, and this occurs every couple of minutes or so, is there any fixes to this issue? I've run LatencyMon and here's my results.

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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 0:06:37 h:mm:ss on all processors.





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SYSTEM INFORMATION

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Computer name: DESKTOP-8DUG32T

OS version: Windows 10 , 10.0, build: 18363 x64

Hardware: Inspiron 15 7000 Gaming, Dell Inc., 065C71

CPU: GenuineIntel IntelR CoreTM i7-7700HQ CPU @ 2.80GHz

Logical processors: 8

Processor groups: 1

RAM: 16250 MB total





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CPU SPEED

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Reported CPU speed: 2808 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 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: 22650.50

Average measured interrupt to process latency µs: 4.664887



Highest measured interrupt to DPC latency µs: 22643.90

Average measured interrupt to DPC latency µs: 1.527655





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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: 300.815171

Driver with highest ISR routine execution time: ACPI.sys - ACPI Driver for NT, Microsoft Corporation



Highest reported total ISR routine time %: 0.004493

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



Total time spent in ISRs % 0.008167



ISR count execution time <250 µs: 69601

ISR count execution time 250-500 µs: 0

ISR count execution time 500-999 µs: 1

ISR count execution time 1000-1999 µs: 0

ISR count execution time 2000-3999 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: 22642.218661

Driver with highest DPC routine execution time: DDDriver64Dcsa.sys - Dell Diags Universal Device Driver, Dell Inc.



Highest reported total DPC routine time %: 0.068610

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



Total time spent in DPCs % 0.160212



DPC count execution time <250 µs: 889230

DPC count execution time 250-500 µs: 0

DPC count execution time 500-999 µs: 829

DPC count execution time 1000-1999 µs: 117

DPC count execution time 2000-3999 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: taskhostw.exe



Total number of hard pagefaults 1451

Hard pagefault count of hardest hit process: 524

Number of processes hit: 26





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PER CPU DATA

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CPU 0 Interrupt cycle time s: 19.342088

CPU 0 ISR highest execution time µs: 300.815171

CPU 0 ISR total execution time s: 0.255173

CPU 0 ISR count: 68383

CPU 0 DPC highest execution time µs: 22642.218661

CPU 0 DPC total execution time s: 4.688022

CPU 0 DPC count: 849595

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CPU 1 Interrupt cycle time s: 11.634505

CPU 1 ISR highest execution time µs: 57.398860

CPU 1 ISR total execution time s: 0.003583

CPU 1 ISR count: 1200

CPU 1 DPC highest execution time µs: 503.543091

CPU 1 DPC total execution time s: 0.135005

CPU 1 DPC count: 7227

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CPU 2 Interrupt cycle time s: 11.290806

CPU 2 ISR highest execution time µs: 57.811966

CPU 2 ISR total execution time s: 0.000640

CPU 2 ISR count: 19

CPU 2 DPC highest execution time µs: 736.399929

CPU 2 DPC total execution time s: 0.085352

CPU 2 DPC count: 10417

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CPU 3 Interrupt cycle time s: 14.683743

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: 182.158120

CPU 3 DPC total execution time s: 0.023173

CPU 3 DPC count: 3533

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CPU 4 Interrupt cycle time s: 11.120855

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: 531.179131

CPU 4 DPC total execution time s: 0.055886

CPU 4 DPC count: 7139

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CPU 5 Interrupt cycle time s: 14.322360

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: 240.635684

CPU 5 DPC total execution time s: 0.020023

CPU 5 DPC count: 2435

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CPU 6 Interrupt cycle time s: 10.206137

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: 367.273504

CPU 6 DPC total execution time s: 0.059569

CPU 6 DPC count: 7343

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CPU 7 Interrupt cycle time s: 12.767317

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: 175.404558

CPU 7 DPC total execution time s: 0.021495

CPU 7 DPC count: 2499

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:)

 

DPC Latency High

Hi,

Check these:

Solving DPC Latency Issues - Download Latency Monitor and DPC Latency Checker

Solving DPC Latency Issues | Sweetwater

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Troubleshoot Driver Problems Using DPC Latency Checker | Free Easy-to-Follow Windows Tutorials

DPC Latency Checker - Download

DPC Latency Checker

Hope this helps.

--------------------------------------------------------------------------------------------

Rob Brown -
Microsoft MVP <- profile - Windows and Devices for IT : Bicycle - Mark Twain said it right.

 

storport.sys and ndis.sys DPC latency fix?

So I built my PC back during the summer after getting a summer job, and since building, I have diagnosed and fixed a few issues, but one keeps occurring and I am unable to fix myself. I am not completely sure
if it is a hardware issue or purely software based.

Anyway, I've been getting some latency issues that have caused stuttering and sometimes lag while streaming videos from YouTube and Netflix, playing games, and sometimes even while browsing websites. I downloaded
LatencyMon to help find whats causing these issues, and I have pointed out two major .sys driver files that are causing my stuttering. Those being "storport.sys", which is the major cause, and "ndis.sys" being the smaller, but yet
significant cause.

storport.sys definition in LatencyMon is "Microsoft Storage Port Driver", and ndis.sys description is "Network Driver Interface Specifications".

storport.sys gives me upwards of 100,000 in LatencyMon, and I believe ndis.sys gives me about 20,000.

I've read somewhere that storport.sys latency is mostly caused by the Samsung m.2 SSD's but I'm not sure how to fix this

I keep all my drivers updated using DriverEasy

Specs:

MB: Aorus X470 Ultra Gaming ATX AM4 Socket

CPU: AMD Ryzen 2600

GPU: Gigabyte Geforce GTX 1060 6GB Windforce OC Edition

Memory: G.Skill Ripjaw V-Series 16GB DDR4-3200 - F4-3200C16D-16GVKB (Possible latency cause?)

Storage: Samsung 970 EVO 250GB (Boot)

Storage: Seagate Barracuda 2TB HDD (Mass)

Storage: Western Digital "Blue?" 3TB HDD (Backup) (Not 100% sure which drive this is, I think it's blue)

Network Card: TP-Link TL-WDN4800 PCIe x1 802.11a/b/g/n (Possibly cause of ndis.sys latency?)

Operating System: Windows 10 Pro 64bit

Here's the link to the PcPartPicker parts list if its needed: System Builder

Here's what LatencyMon comes up with after experiencing a storport.sys latency spike:

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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 0:10:19 (h:mm:ss) on all processors.

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SYSTEM INFORMATION

_________________________________________________________________________________________________________

Computer name: TYS-PC

OS version: Windows 10 , 10.0, build: 17763 (x64)

Hardware: X470 AORUS ULTRA GAMING, Gigabyte Technology Co., Ltd., X470 AORUS ULTRA GAMING-CF

CPU: AuthenticAMD AMD Ryzen 5 2600 Six-Core Processor

Logical processors: 6

Processor groups: 1

RAM: 16331 MB total

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CPU SPEED

_________________________________________________________________________________________________________

Reported CPU speed: 340 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.

_________________________________________________________________________________________________________

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): 100830.20

Average measured interrupt to process latency (µs): 3.116927

Highest measured interrupt to DPC latency (µs): 100827.60

Average measured interrupt to DPC latency (µs): 1.344504

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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): 148.150

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

Highest reported total ISR routine time (%): 0.095580

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

Total time spent in ISRs (%) 0.105838

ISR count (execution time <250 µs): 228176

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

ISR count (execution time 500-999 µs): 0

ISR count (execution time 1000-1999 µs): 0

ISR count (execution time 2000-3999 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): 100834.210

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

Highest reported total DPC routine time (%): 0.062271

Driver with highest DPC total execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 416.94 , NVIDIA Corporation

Total time spent in DPCs (%) 0.169238

DPC count (execution time <250 µs): 1872845

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

DPC count (execution time 500-999 µs): 227

DPC count (execution time 1000-1999 µs): 0

DPC count (execution time 2000-3999 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: chrome.exe

Total number of hard pagefaults 33063

Hard pagefault count of hardest hit process: 8281

Number of processes hit: 84

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PER CPU DATA

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CPU 0 Interrupt cycle time (s): 14.904984

CPU 0 ISR highest execution time (µs): 148.150

CPU 0 ISR total execution time (s): 3.907992

CPU 0 ISR count: 224044

CPU 0 DPC highest execution time (µs): 100834.210

CPU 0 DPC total execution time (s): 6.092103

CPU 0 DPC count: 1833174

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CPU 1 Interrupt cycle time (s): 1.837817

CPU 1 ISR highest execution time (µs): 72.60

CPU 1 ISR total execution time (s): 0.017628

CPU 1 ISR count: 1600

CPU 1 DPC highest execution time (µs): 533.150

CPU 1 DPC total execution time (s): 0.092153

CPU 1 DPC count: 13765

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CPU 2 Interrupt cycle time (s): 1.719505

CPU 2 ISR highest execution time (µs): 59.50

CPU 2 ISR total execution time (s): 0.003827

CPU 2 ISR count: 517

CPU 2 DPC highest execution time (µs): 110.490

CPU 2 DPC total execution time (s): 0.042660

CPU 2 DPC count: 11228

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CPU 3 Interrupt cycle time (s): 1.836355

CPU 3 ISR highest execution time (µs): 2.460

CPU 3 ISR total execution time (s): 0.000320

CPU 3 ISR count: 427

CPU 3 DPC highest execution time (µs): 85.570

CPU 3 DPC total execution time (s): 0.018822

CPU 3 DPC count: 4977

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CPU 4 Interrupt cycle time (s): 1.813737

CPU 4 ISR highest execution time (µs): 1.820

CPU 4 ISR total execution time (s): 0.000497

CPU 4 ISR count: 701

CPU 4 DPC highest execution time (µs): 228.950

CPU 4 DPC total execution time (s): 0.019418

CPU 4 DPC count: 4982

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CPU 5 Interrupt cycle time (s): 1.796899

CPU 5 ISR highest execution time (µs): 4.290

CPU 5 ISR total execution time (s): 0.000660

CPU 5 ISR count: 887

CPU 5 DPC highest execution time (µs): 108.190

CPU 5 DPC total execution time (s): 0.020504

CPU 5 DPC count: 4948

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Thanks to anyone that takes a look into this. You're really helping me out. The stutters are getting quite annoying.

 

V1903 Causing DPC Latency Hits

Really appreciate the update