Question I'm having issues with DPC Latency ?

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AGoodChangedBoy

Prominent
Sep 27, 2022
4
0
510
This is what latencymon says


  1. _________________________________________________________________________________________________________

  2. CONCLUSION
  3. _________________________________________________________________________________________________________
  4. Your system seems to be having difficulty handling real-time audio and other tasks. You may experience drop outs, clicks or pops due to buffer underruns. 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.
  5. LatencyMon has been analyzing your system for 4:11:36 (h:mm:ss) on all processors.


  8. _________________________________________________________________________________________________________
  9. SYSTEM INFORMATION
  10. _________________________________________________________________________________________________________
  11. Computer name: DESKTOP-HAPSP1P
  12. OS version: Windows 10, 10.0, version 2009, build: 19045 (x64)
  13. Hardware: System Product Name, ASUS
  14. BIOS: 2004
  15. CPU: GenuineIntel Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
  16. Logical processors: 12
  17. Processor groups: 1
  18. Processor group size: 12
  19. RAM: 32683 MB total


  22. _________________________________________________________________________________________________________
  23. CPU SPEED
  24. _________________________________________________________________________________________________________
  25. Reported CPU speed (WMI): 3696 MHz
  26. Reported CPU speed (registry): 3696 MHz

  28. 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.


  31. _________________________________________________________________________________________________________
  32. MEASURED INTERRUPT TO USER PROCESS LATENCIES
  33. _________________________________________________________________________________________________________
  34. 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.

  36. Highest measured interrupt to process latency (µs): 958.60
  37. Average measured interrupt to process latency (µs): 6.096332

  39. Highest measured interrupt to DPC latency (µs): 953.40
  40. Average measured interrupt to DPC latency (µs): 3.031162


  43. _________________________________________________________________________________________________________
  44. REPORTED ISRs
  45. _________________________________________________________________________________________________________
  46. Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.

  48. Highest ISR routine execution time (µs): 391.068182
  49. Driver with highest ISR routine execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

  51. Highest reported total ISR routine time (%): 0.142058
  52. Driver with highest ISR total time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

  54. Total time spent in ISRs (%) 0.144384

  56. ISR count (execution time <250 µs): 10083578
  57. ISR count (execution time 250-500 µs): 0
  58. ISR count (execution time 500-1000 µs): 31
  59. ISR count (execution time 1000-2000 µs): 0
  60. ISR count (execution time 2000-4000 µs): 0
  61. ISR count (execution time >=4000 µs): 0


  64. _________________________________________________________________________________________________________
  65. REPORTED DPCs
  66. _________________________________________________________________________________________________________
  67. 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.

  69. Highest DPC routine execution time (µs): 1877.845238
  70. Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 552.22 , NVIDIA Corporation

  72. Highest reported total DPC routine time (%): 0.098614
  73. Driver with highest DPC total execution time: dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

  75. Total time spent in DPCs (%) 0.197662

  77. DPC count (execution time <250 µs): 33365120
  78. DPC count (execution time 250-500 µs): 0
  79. DPC count (execution time 500-10000 µs): 16454
  80. DPC count (execution time 1000-2000 µs): 5
  81. DPC count (execution time 2000-4000 µs): 0
  82. DPC count (execution time >=4000 µs): 0


  85. _________________________________________________________________________________________________________
  86. REPORTED HARD PAGEFAULTS
  87. _________________________________________________________________________________________________________
  88. 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.

  90. 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.

  92. Process with highest pagefault count: msmpeng.exe

  94. Total number of hard pagefaults 32815
  95. Hard pagefault count of hardest hit process: 16590
  96. Number of processes hit: 112


  99. _________________________________________________________________________________________________________
  100. PER CPU DATA
  101. _________________________________________________________________________________________________________
  102. CPU 0 Interrupt cycle time (s): 1206.110350
  103. CPU 0 ISR highest execution time (µs): 391.068182
  104. CPU 0 ISR total execution time (s): 260.553510
  105. CPU 0 ISR count: 9318886
  106. CPU 0 DPC highest execution time (µs): 1877.845238
  107. CPU 0 DPC total execution time (s): 333.290502
  108. CPU 0 DPC count: 30453198
  109. _________________________________________________________________________________________________________
  110. CPU 1 Interrupt cycle time (s): 182.274360
  111. CPU 1 ISR highest execution time (µs): 65.929654
  112. CPU 1 ISR total execution time (s): 1.004805
  113. CPU 1 ISR count: 764556
  114. CPU 1 DPC highest execution time (µs): 243.275433
  115. CPU 1 DPC total execution time (s): 18.149084
  116. CPU 1 DPC count: 979035
  117. _________________________________________________________________________________________________________
  118. CPU 2 Interrupt cycle time (s): 99.264097
  119. CPU 2 ISR highest execution time (µs): 16.300866
  120. CPU 2 ISR total execution time (s): 0.000213
  121. CPU 2 ISR count: 167
  122. CPU 2 DPC highest execution time (µs): 244.113636
  123. CPU 2 DPC total execution time (s): 0.808530
  124. CPU 2 DPC count: 310244
  125. _________________________________________________________________________________________________________
  126. CPU 3 Interrupt cycle time (s): 92.997920
  127. CPU 3 ISR highest execution time (µs): 0.0
  128. CPU 3 ISR total execution time (s): 0.0
  129. CPU 3 ISR count: 0
  130. CPU 3 DPC highest execution time (µs): 273.045455
  131. CPU 3 DPC total execution time (s): 0.389935
  132. CPU 3 DPC count: 134604
  133. _________________________________________________________________________________________________________
  134. CPU 4 Interrupt cycle time (s): 94.257299
  135. CPU 4 ISR highest execution time (µs): 0.0
  136. CPU 4 ISR total execution time (s): 0.0
  137. CPU 4 ISR count: 0
  138. CPU 4 DPC highest execution time (µs): 248.192641
  139. CPU 4 DPC total execution time (s): 0.881663
  140. CPU 4 DPC count: 307319
  141. _________________________________________________________________________________________________________
  142. CPU 5 Interrupt cycle time (s): 90.129780
  143. CPU 5 ISR highest execution time (µs): 0.0
  144. CPU 5 ISR total execution time (s): 0.0
  145. CPU 5 ISR count: 0
  146. CPU 5 DPC highest execution time (µs): 247.738095
  147. CPU 5 DPC total execution time (s): 0.423894
  148. CPU 5 DPC count: 137363
  149. _________________________________________________________________________________________________________
  150. CPU 6 Interrupt cycle time (s): 88.660021
  151. CPU 6 ISR highest execution time (µs): 0.0
  152. CPU 6 ISR total execution time (s): 0.0
  153. CPU 6 ISR count: 0
  154. CPU 6 DPC highest execution time (µs): 247.255952
  155. CPU 6 DPC total execution time (s): 0.805658
  156. CPU 6 DPC count: 267842
  157. _________________________________________________________________________________________________________
  158. CPU 7 Interrupt cycle time (s): 81.740936
  159. CPU 7 ISR highest execution time (µs): 0.0
  160. CPU 7 ISR total execution time (s): 0.0
  161. CPU 7 ISR count: 0
  162. CPU 7 DPC highest execution time (µs): 247.087121
  163. CPU 7 DPC total execution time (s): 0.359721
  164. CPU 7 DPC count: 124731
  165. _________________________________________________________________________________________________________
  166. CPU 8 Interrupt cycle time (s): 93.174653
  167. CPU 8 ISR highest execution time (µs): 0.0
  168. CPU 8 ISR total execution time (s): 0.0
  169. CPU 8 ISR count: 0
  170. CPU 8 DPC highest execution time (µs): 243.023268
  171. CPU 8 DPC total execution time (s): 0.741219
  172. CPU 8 DPC count: 219225
  173. _________________________________________________________________________________________________________
  174. CPU 9 Interrupt cycle time (s): 84.032644
  175. CPU 9 ISR highest execution time (µs): 0.0
  176. CPU 9 ISR total execution time (s): 0.0
  177. CPU 9 ISR count: 0
  178. CPU 9 DPC highest execution time (µs): 240.170996
  179. CPU 9 DPC total execution time (s): 0.324917
  180. CPU 9 DPC count: 96114
  181. _________________________________________________________________________________________________________
  182. CPU 10 Interrupt cycle time (s): 98.165964
  183. CPU 10 ISR highest execution time (µs): 0.0
  184. CPU 10 ISR total execution time (s): 0.0
  185. CPU 10 ISR count: 0
  186. CPU 10 DPC highest execution time (µs): 236.808442
  187. CPU 10 DPC total execution time (s): 1.315625
  188. CPU 10 DPC count: 244300
  189. _________________________________________________________________________________________________________
  190. CPU 11 Interrupt cycle time (s): 83.656314
  191. CPU 11 ISR highest execution time (µs): 0.0
  192. CPU 11 ISR total execution time (s): 0.0
  193. CPU 11 ISR count: 0
  194. CPU 11 DPC highest execution time (µs): 239.103355
  195. CPU 11 DPC total execution time (s): 0.583527
  196. CPU 11 DPC count: 107604
  197. _________________________________________________________________________________________________________
 
thestryker

thestryker

Splendid
Apr 19, 2016
3,012
1,568
24,090
What actual problem are you having?

Full system specs would be helpful.

NV drivers are often problematic with regards to DPC latency and they've supposedly tried to address it a few times with limited results. You could try the studio drivers to see if they work better.
 
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