Windows 10: LatencyMon high measured time kernel latency.

Hi, I've been having this problem on this copy of Windows on the old rig and on the new as well - I've changed the internals but not the disk. Another CPU/GPU/chipset - same problem. It's been a year since I'm having it.I'm currently having: MSI B550M Mortar MAX Wi-Fi / R5 5600X / 32Gb 3600Mhz XMP1 / RTX 3060 / MOTU M4 / Win10 22H2 19045.3570 Windows Feature Experience Pack 1000.19052.1000.0All drivers are clean, fresh and up to date. Here's log:_________________________________________________________________________________________________________ CONCLUSION______________________________

:)

 

Audio and Video Tearing - High DPC Latency in LatencyMon

Hi, if you search tenforums for Latencymon, for example, you will find other threads which might suggest a way forward.

Diagnosing this problem is not straightforward.

One approach is to simplify hardware as much as possible, another to use a somewhat daunting tool from MS, the Windows Performance Recorder (tutorial available).




Similarly if you search tenforums for references to this you will see some example screenshots.

More:
Solving DPC Latency Issues | Sweetwater

Resplendence Software - LatencyMon: real-time audio suitability checker


Older:
How to Diagnose and Fix High DPC Latency Issues with WPA (Windows Vista/7/8) | Sysnative Forums

History: (so often omitted by posters):
- when did you last not have this problem?
- what has changed since then?
- change of hardware... feature update (upgrade).. other updates...

Windows build: 1904 is not a valid major build. Please choose from
1903, 1909, 2004

 

Latencymon optimize

Hi, I optimize my PC and I attack the latency, except that the problem, I do not happen
Here are the statistics:





CONCLUSION
_________________________________________________________________________________________________________
Your system appears to be suitable for handling real-time audio and other tasks without dropouts.
LatencyMon has been analyzing your system for 0:13:58 (h:mm:ss) on all processors.

_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name: CHARLES
OS version: Windows 10 , 10.0, build: 18363 (x64)
Hardware: GE73VR 7RE, Micro-Star International Co., Ltd., MS-17C1
CPU: GenuineIntel Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
Logical processors: 4
Processor groups: 1
RAM: 16265 MB total

_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
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.

_________________________________________________________________________________________________________
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): 328,20
Average measured interrupt to process latency (µs): 2,032420

Highest measured interrupt to DPC latency (µs): 325,80
Average measured interrupt to DPC latency (µs): 0,726163

_________________________________________________________________________________________________________
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): 113,822650
Driver with highest ISR routine execution time: ACPI.sys - Pilote ACPI pour NT, Microsoft Corporation

Highest reported total ISR routine time (%): 0,001330
Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation

Total time spent in ISRs (%) 0,001940

ISR count (execution time <250 µs): 6262
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): 431,088319
Driver with highest DPC routine execution time: ndis.sys - NDIS (Network Driver Interface Specification), Microsoft Corporation

Highest reported total DPC routine time (%): 0,003837
Driver with highest DPC total execution time: rspLLL64.sys - Resplendence Latency Monitoring and Auxiliary Kernel Library, Resplendence Software Projects Sp.

Total time spent in DPCs (%) 0,016572

DPC count (execution time <250 µs): 327277
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 245

 

Windows 10 High Dpc Latency

I believe DPC Latency Checker does not support WIN 10. Please try LatencyMon and check.

I had this issue so thought of sharing.