Hello everyone,
I am having an issue with my music, videos, games and general system usage coming to a brief halt every so often by high DPC reported by driver tcpip.sys, which I believe is to be related to the Intel I350-T4V2 NIC that I have in my system. This is the report from LatencyMon that was generated after nine minutes of it running:
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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. 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 0:09:15 (h:mm:ss) on all processors.
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SYSTEM INFORMATION
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Computer name: STEVEN-DT
OS version: Windows 10 , 10.0, build: 15063 (x64)
Hardware: ASRock, Z370 Gaming K6
CPU: GenuineIntel Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
Logical processors: 12
Processor groups: 1
RAM: 32701 MB total
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CPU SPEED
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Reported CPU speed: 3696 MHz
Measured CPU speed: 1 MHz (approx.)
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): 64369.038961
Average measured interrupt to process latency (µs): 5.038917
Highest measured interrupt to DPC latency (µs): 64365.437229
Average measured interrupt to DPC latency (µs): 1.360576
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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): 92.833333
Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Highest reported total ISR routine time (%): 0.100551
Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation
Total time spent in ISRs (%) 0.122042
ISR count (execution time <250 µs): 864900
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
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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): 75280.324134
Driver with highest DPC routine execution time: tcpip.sys - TCP/IP Driver, Microsoft Corporation
Highest reported total DPC routine time (%): 0.043887
Driver with highest DPC total execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 388.31 , NVIDIA Corporation
Total time spent in DPCs (%) 0.135294
DPC count (execution time <250 µs): 3095769
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 1
DPC count (execution time 1000-1999 µs): 0
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.
Process with highest pagefault count: none
Total number of hard pagefaults 0
Hard pagefault count of hardest hit process: 0
Highest hard pagefault resolution time (µs): 0.0
Total time spent in hard pagefaults (%): 0.0
Number of processes hit: 0
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PER CPU DATA
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CPU 0 Interrupt cycle time (s): 21.807476
CPU 0 ISR highest execution time (µs): 92.833333
CPU 0 ISR total execution time (s): 8.127851
CPU 0 ISR count: 864377
CPU 0 DPC highest execution time (µs): 418.928030
CPU 0 DPC total execution time (s): 7.968359
CPU 0 DPC count: 2881669
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CPU 1 Interrupt cycle time (s): 5.576597
CPU 1 ISR highest execution time (µs): 18.037338
CPU 1 ISR total execution time (s): 0.000633
CPU 1 ISR count: 523
CPU 1 DPC highest execution time (µs): 156.160173
CPU 1 DPC total execution time (s): 0.031753
CPU 1 DPC count: 2473
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CPU 2 Interrupt cycle time (s): 3.872798
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): 111.264610
CPU 2 DPC total execution time (s): 0.109259
CPU 2 DPC count: 30866
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CPU 3 Interrupt cycle time (s): 3.914723
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): 75280.324134
CPU 3 DPC total execution time (s): 0.213586
CPU 3 DPC count: 3120
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CPU 4 Interrupt cycle time (s): 4.130378
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): 127.520022
CPU 4 DPC total execution time (s): 0.120647
CPU 4 DPC count: 40343
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CPU 5 Interrupt cycle time (s): 3.761527
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): 83.285173
CPU 5 DPC total execution time (s): 0.004639
CPU 5 DPC count: 1086
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CPU 6 Interrupt cycle time (s): 4.832866
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): 101.324675
CPU 6 DPC total execution time (s): 0.199118
CPU 6 DPC count: 46428
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CPU 7 Interrupt cycle time (s): 3.556605
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): 82.946970
CPU 7 DPC total execution time (s): 0.003708
CPU 7 DPC count: 596
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CPU 8 Interrupt cycle time (s): 3.937102
CPU 8 ISR highest execution time (µs): 0.0
CPU 8 ISR total execution time (s): 0.0
CPU 8 ISR count: 0
CPU 8 DPC highest execution time (µs): 136.426407
CPU 8 DPC total execution time (s): 0.144712
CPU 8 DPC count: 39441
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CPU 9 Interrupt cycle time (s): 3.597930
CPU 9 ISR highest execution time (µs): 0.0
CPU 9 ISR total execution time (s): 0.0
CPU 9 ISR count: 0
CPU 9 DPC highest execution time (µs): 82.416126
CPU 9 DPC total execution time (s): 0.014064
CPU 9 DPC count: 6686
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CPU 10 Interrupt cycle time (s): 4.082868
CPU 10 ISR highest execution time (µs): 0.0
CPU 10 ISR total execution time (s): 0.0
CPU 10 ISR count: 0
CPU 10 DPC highest execution time (µs): 122.268939
CPU 10 DPC total execution time (s): 0.162320
CPU 10 DPC count: 36323
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CPU 11 Interrupt cycle time (s): 3.982992
CPU 11 ISR highest execution time (µs): 0.0
CPU 11 ISR total execution time (s): 0.0
CPU 11 ISR count: 0
CPU 11 DPC highest execution time (µs): 81.980519
CPU 11 DPC total execution time (s): 0.038943
CPU 11 DPC count: 6742
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I have tried updating my I350's driver to the latest version (12.15.184.0) but the problem persists. I have the latest UEFI update from ASRock (v1.30) and Windows is up to date with all the latest updates. I am at a loss at what to do to solve this issue.
Thanks in advance.