Question Extreme DPC Latency issues with unknown cause ?

zanglucarson

Commendable
Jan 9, 2019
6
0
1,510
0
Hi all.
About a month ago, I started having DPC latency issues. It has made this past week absolute hell.
I've explored several different forums, troubleshooted every imaginable cause I can think of, and have had my workflow heavily impeded by this issue as it renders Blender (I'm too pissed to make a joke about the irony or this rhyme) entirely useless.
Numerous drivers have popped up on latencymon as the issue, dxgkrnl.sys, ntoskrnl.exe, wdf01000.sys, storport,sys and, hdaudbus.sys have all popped up as issue at one point or another.
I have noticed that there appears to occasionally be latency in the bios, so I was thinking it could be motherboard issue?
So far I've tried:

  • Playing with the power settings in windows
  • Disabling the high precision event timer
  • Messing with the settings for my network driver
  • Fresh installing windows twice (helped for a while the first time but issues persisted the next day)
  • swapping the memory kits
  • reinstalling chipset drivers
  • manually updating every single driver in device manager
  • uninstalling my graphics card drivers with ddu and reinstalling several times
  • reseating my CPU
  • Re-flashing my bios
  • "chkdsk C: /r" ,"DISM /Online /Cleanup-Image /RestoreHealth ", and "sfc /scannow " (also helped for a bit but not for long)
  • disconnecting my other hard drives
  • memtest, and windows memory diagnostic (neither produced a result)
  • and many other things
Also, I do not have bitdefender.
Here are my specs:
speccy.piriform.com/results/4KAgmTB2iiuIr57H3mjhhsg

Here is my latencymon report
Code:
_________________________________________________________________________________________________________
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. Also one or more ISR 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  0:25:18  (h:mm:ss) on all processors.


_________________________________________________________________________________________________________
SYSTEM INFORMATION
_________________________________________________________________________________________________________
Computer name:                                        DESKTOP-NME1G9T
OS version:                                           Windows 10, 10.0, version 2009, build: 19042 (x64)
Hardware:                                             System Product Name, System manufacturer
CPU:                                                  AuthenticAMD AMD Ryzen 7 2700X Eight-Core Processor
Logical processors:                                   16
Processor groups:                                     1
RAM:                                                  40883 MB total


_________________________________________________________________________________________________________
CPU SPEED
_________________________________________________________________________________________________________
Reported CPU speed:                                   370 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):   158465.40
Average measured interrupt to process latency (µs):   23.776339

Highest measured interrupt to DPC latency (µs):       158434.30
Average measured interrupt to DPC latency (µs):       19.656580


_________________________________________________________________________________________________________
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):              62007.450
Driver with highest ISR routine execution time:       HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation

Highest reported total ISR routine time (%):          0.002530
Driver with highest ISR total time:                   HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation

Total time spent in ISRs (%)                          0.003071

ISR count (execution time <250 µs):                   108075
ISR count (execution time 250-500 µs):                0
ISR count (execution time 500-1000 µs):               0
ISR count (execution time 1000-2000 µs):              9
ISR count (execution time 2000-4000 µs):              19
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):              114279.930
Driver with highest DPC routine execution time:       ntoskrnl.exe - NT Kernel & System, Microsoft Corporation

Highest reported total DPC routine time (%):          0.011483
Driver with highest DPC total execution time:         dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Total time spent in DPCs (%)                          0.033991

DPC count (execution time <250 µs):                   726778
DPC count (execution time 250-500 µs):                0
DPC count (execution time 500-10000 µs):              44
DPC count (execution time 1000-2000 µs):              38
DPC count (execution time 2000-4000 µs):              85
DPC count (execution time >=4000 µs):                 218


_________________________________________________________________________________________________________
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:                 msmpeng.exe

Total number of hard pagefaults                       38237
Hard pagefault count of hardest hit process:          19899
Number of processes hit:                              70


_________________________________________________________________________________________________________
PER CPU DATA
_________________________________________________________________________________________________________
CPU 0 Interrupt cycle time (s):                       53.677779
CPU 0 ISR highest execution time (µs):                2124.220
CPU 0 ISR total execution time (s):                   0.111599
CPU 0 ISR count:                                      70111
CPU 0 DPC highest execution time (µs):                94149.730
CPU 0 DPC total execution time (s):                   5.072791
CPU 0 DPC count:                                      485412
_________________________________________________________________________________________________________
CPU 1 Interrupt cycle time (s):                       24.159899
CPU 1 ISR highest execution time (µs):                62007.450
CPU 1 ISR total execution time (s):                   0.313896
CPU 1 ISR count:                                      1364
CPU 1 DPC highest execution time (µs):                76661.510
CPU 1 DPC total execution time (s):                   0.352835
CPU 1 DPC count:                                      19738
_________________________________________________________________________________________________________
CPU 2 Interrupt cycle time (s):                       21.448166
CPU 2 ISR highest execution time (µs):                29871.240
CPU 2 ISR total execution time (s):                   0.173377
CPU 2 ISR count:                                      1659
CPU 2 DPC highest execution time (µs):                50015.740
CPU 2 DPC total execution time (s):                   0.951960
CPU 2 DPC count:                                      63597
_________________________________________________________________________________________________________
CPU 3 Interrupt cycle time (s):                       20.257938
CPU 3 ISR highest execution time (µs):                7.830
CPU 3 ISR total execution time (s):                   0.000364
CPU 3 ISR count:                                      299
CPU 3 DPC highest execution time (µs):                27986.420
CPU 3 DPC total execution time (s):                   0.164862
CPU 3 DPC count:                                      4484
_________________________________________________________________________________________________________
CPU 4 Interrupt cycle time (s):                       19.433301
CPU 4 ISR highest execution time (µs):                17945.250
CPU 4 ISR total execution time (s):                   0.042219
CPU 4 ISR count:                                      172
CPU 4 DPC highest execution time (µs):                22015.060
CPU 4 DPC total execution time (s):                   0.208176
CPU 4 DPC count:                                      17260
_________________________________________________________________________________________________________
CPU 5 Interrupt cycle time (s):                       18.419345
CPU 5 ISR highest execution time (µs):                37987.260
CPU 5 ISR total execution time (s):                   0.044218
CPU 5 ISR count:                                      209
CPU 5 DPC highest execution time (µs):                7240.980
CPU 5 DPC total execution time (s):                   0.036672
CPU 5 DPC count:                                      4470
_________________________________________________________________________________________________________
CPU 6 Interrupt cycle time (s):                       18.245725
CPU 6 ISR highest execution time (µs):                7.760
CPU 6 ISR total execution time (s):                   0.000155
CPU 6 ISR count:                                      135
CPU 6 DPC highest execution time (µs):                29621.070
CPU 6 DPC total execution time (s):                   0.102859
CPU 6 DPC count:                                      11422
_________________________________________________________________________________________________________
CPU 7 Interrupt cycle time (s):                       19.026141
CPU 7 ISR highest execution time (µs):                2.470
CPU 7 ISR total execution time (s):                   0.000037
CPU 7 ISR count:                                      83
CPU 7 DPC highest execution time (µs):                240.460
CPU 7 DPC total execution time (s):                   0.008007
CPU 7 DPC count:                                      2610
_________________________________________________________________________________________________________
CPU 8 Interrupt cycle time (s):                       19.549322
CPU 8 ISR highest execution time (µs):                1.190
CPU 8 ISR total execution time (s):                   0.000014
CPU 8 ISR count:                                      30
CPU 8 DPC highest execution time (µs):                6013.180
CPU 8 DPC total execution time (s):                   0.068559
CPU 8 DPC count:                                      13977
_________________________________________________________________________________________________________
CPU 9 Interrupt cycle time (s):                       20.223715
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):                72.210
CPU 9 DPC total execution time (s):                   0.017607
CPU 9 DPC count:                                      4525
_________________________________________________________________________________________________________
CPU 10 Interrupt cycle time (s):                       18.261536
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):                18018.360
CPU 10 DPC total execution time (s):                   0.173551
CPU 10 DPC count:                                      33196
_________________________________________________________________________________________________________
CPU 11 Interrupt cycle time (s):                       18.732873
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):                45968.970
CPU 11 DPC total execution time (s):                   0.077290
CPU 11 DPC count:                                      2908
_________________________________________________________________________________________________________
CPU 12 Interrupt cycle time (s):                       19.629929
CPU 12 ISR highest execution time (µs):                11.780
CPU 12 ISR total execution time (s):                   0.017849
CPU 12 ISR count:                                      28982
CPU 12 DPC highest execution time (µs):                46097.280
CPU 12 DPC total execution time (s):                   0.272918
CPU 12 DPC count:                                      20394
_________________________________________________________________________________________________________
CPU 13 Interrupt cycle time (s):                       20.122621
CPU 13 ISR highest execution time (µs):                2.830
CPU 13 ISR total execution time (s):                   0.000464
CPU 13 ISR count:                                      658
CPU 13 DPC highest execution time (µs):                4078.490
CPU 13 DPC total execution time (s):                   0.077788
CPU 13 DPC count:                                      12417
_________________________________________________________________________________________________________
CPU 14 Interrupt cycle time (s):                       20.458728
CPU 14 ISR highest execution time (µs):                12027.280
CPU 14 ISR total execution time (s):                   0.035470
CPU 14 ISR count:                                      1427
CPU 14 DPC highest execution time (µs):                114279.930
CPU 14 DPC total execution time (s):                   0.347092
CPU 14 DPC count:                                      10269
_________________________________________________________________________________________________________
CPU 15 Interrupt cycle time (s):                       19.137743
CPU 15 ISR highest execution time (µs):                4008.880
CPU 15 ISR total execution time (s):                   0.006397
CPU 15 ISR count:                                      3015
CPU 15 DPC highest execution time (µs):                48139.720
CPU 15 DPC total execution time (s):                   0.325890
CPU 15 DPC count:                                      20484
_________________________________________________________________________________________________________
At this rate anything helps. I'm at my wits end with this thing.
 

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