Question High DPC LatencyMoon

Nov 15, 2022
So I was experimenting some freezes on my Alienware 15 R2
Its very unpredictable but happens every 40 min - 1 hour of using it, the display freeze out only for 2 secs, and if I have sound the same thing happen.

These are my Specs:
Windows 11
Ram: 16 GB
SSD 128 + HDD 1 TB
Nvidia 980M

LatencyMon Stats:
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 1:33:44 (h🇲🇲ss) on all processors.

Computer name: PCWOLF
OS version: Windows 10, 10.0, version 2009, build: 22623 (x64)
Hardware: Alienware 15 R2, Alienware
CPU: GenuineIntel Intel(R) Core(TM) i7-6820HK CPU @ 2.70GHz
Logical processors: 8
Processor groups: 1
RAM: 16250 MB total

Reported CPU speed: 2712 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.

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): 2225.80
Average measured interrupt to process latency (µs): 7.297040

Highest measured interrupt to DPC latency (µs): 719.0
Average measured interrupt to DPC latency (µs): 1.940636

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): 454.687316
Driver with highest ISR routine execution time: ACPI.sys - Controlador ACPI para NT, Microsoft Corporation

Highest reported total ISR routine time (%): 0.010611
Driver with highest ISR total time: Wdf01000.sys - Motor en tiempo de ejecución del marco de controlador en modo kernel, Microsoft Corporation

Total time spent in ISRs (%) 0.017191

ISR count (execution time <250 µs): 1183859
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-1000 µs): 28
ISR count (execution time 1000-2000 µs): 0
ISR count (execution time 2000-4000 µs): 0
ISR count (execution time >=4000 µs): 0

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): 3498.339971
Driver with highest DPC routine execution time: ndis.sys - Especificación de interfaz de controlador de red (NDIS), Microsoft Corporation

Highest reported total DPC routine time (%): 0.014065
Driver with highest DPC total execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Total time spent in DPCs (%) 0.071435

DPC count (execution time <250 µs): 3529559
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-10000 µs): 6215
DPC count (execution time 1000-2000 µs): 348
DPC count (execution time 2000-4000 µs): 20
DPC count (execution time >=4000 µs): 0

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 38685
Hard pagefault count of hardest hit process: 9195
Number of processes hit: 248

CPU 0 Interrupt cycle time (s): 83.425031
CPU 0 ISR highest execution time (µs): 454.687316
CPU 0 ISR total execution time (s): 7.734526
CPU 0 ISR count: 1183874
CPU 0 DPC highest execution time (µs): 2188.801254
CPU 0 DPC total execution time (s): 16.592601
CPU 0 DPC count: 2415929
CPU 1 Interrupt cycle time (s): 27.745193
CPU 1 ISR highest execution time (µs): 4.736357
CPU 1 ISR total execution time (s): 0.000040
CPU 1 ISR count: 13
CPU 1 DPC highest execution time (µs): 797.126475
CPU 1 DPC total execution time (s): 0.618514
CPU 1 DPC count: 87025
CPU 2 Interrupt cycle time (s): 45.397851
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): 3498.339971
CPU 2 DPC total execution time (s): 8.348562
CPU 2 DPC count: 282112
CPU 3 Interrupt cycle time (s): 25.981443
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): 759.931047
CPU 3 DPC total execution time (s): 0.637928
CPU 3 DPC count: 94011
CPU 4 Interrupt cycle time (s): 29.932411
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): 693.383850
CPU 4 DPC total execution time (s): 1.055654
CPU 4 DPC count: 129927
CPU 5 Interrupt cycle time (s): 32.847187
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): 764.312684
CPU 5 DPC total execution time (s): 1.272560
CPU 5 DPC count: 147483
CPU 6 Interrupt cycle time (s): 38.326755
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): 853.241150
CPU 6 DPC total execution time (s): 2.001302
CPU 6 DPC count: 219304
CPU 7 Interrupt cycle time (s): 32.700308
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): 749.335546
CPU 7 DPC total execution time (s): 1.613020
CPU 7 DPC count: 160351