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DPC latency log

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Dec 9th, 2020
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  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 0:05:01 (h:mm:ss) on all processors.
  6.  
  7.  
  8. _________________________________________________________________________________________________________
  9. SYSTEM INFORMATION
  10. _________________________________________________________________________________________________________
  11. Computer name: MSI
  12. OS version: Windows 10, 10.0, version 1909, build: 18363 (x64)
  13. Hardware: Prestige 14 A10SC, Micro-Star International Co., Ltd.
  14. CPU: GenuineIntel Intel(R) Core(TM) i7-10710U CPU @ 1.10GHz
  15. Logical processors: 12
  16. Processor groups: 1
  17. RAM: 16217 MB total
  18.  
  19.  
  20. _________________________________________________________________________________________________________
  21. CPU SPEED
  22. _________________________________________________________________________________________________________
  23. Reported CPU speed: 1608 MHz
  24.  
  25. 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.
  26.  
  27.  
  28. _________________________________________________________________________________________________________
  29. MEASURED INTERRUPT TO USER PROCESS LATENCIES
  30. _________________________________________________________________________________________________________
  31. 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.
  32.  
  33. Highest measured interrupt to process latency (µs): 938.0
  34. Average measured interrupt to process latency (µs): 2.732153
  35.  
  36. Highest measured interrupt to DPC latency (µs): 935.0
  37. Average measured interrupt to DPC latency (µs): 0.953007
  38.  
  39.  
  40. _________________________________________________________________________________________________________
  41. REPORTED ISRs
  42. _________________________________________________________________________________________________________
  43. Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.
  44.  
  45. Highest ISR routine execution time (µs): 217.055348
  46. Driver with highest ISR routine execution time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation
  47.  
  48. Highest reported total ISR routine time (%): 0.013533
  49. Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation
  50.  
  51. Total time spent in ISRs (%) 0.017887
  52.  
  53. ISR count (execution time <250 µs): 80352
  54. ISR count (execution time 250-500 µs): 0
  55. ISR count (execution time 500-1000 µs): 0
  56. ISR count (execution time 1000-2000 µs): 0
  57. ISR count (execution time 2000-4000 µs): 0
  58. ISR count (execution time >=4000 µs): 0
  59.  
  60.  
  61. _________________________________________________________________________________________________________
  62. REPORTED DPCs
  63. _________________________________________________________________________________________________________
  64. 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.
  65.  
  66. Highest DPC routine execution time (µs): 1221.301617
  67. Driver with highest DPC routine execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 457.51 , NVIDIA Corporation
  68.  
  69. Highest reported total DPC routine time (%): 0.012376
  70. Driver with highest DPC total execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 457.51 , NVIDIA Corporation
  71.  
  72. Total time spent in DPCs (%) 0.049342
  73.  
  74. DPC count (execution time <250 µs): 790388
  75. DPC count (execution time 250-500 µs): 0
  76. DPC count (execution time 500-10000 µs): 658
  77. DPC count (execution time 1000-2000 µs): 2
  78. DPC count (execution time 2000-4000 µs): 0
  79. DPC count (execution time >=4000 µs): 0
  80.  
  81.  
  82. _________________________________________________________________________________________________________
  83. REPORTED HARD PAGEFAULTS
  84. _________________________________________________________________________________________________________
  85. 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.
  86.  
  87. 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.
  88.  
  89. Process with highest pagefault count: msmpeng.exe
  90.  
  91. Total number of hard pagefaults 15369
  92. Hard pagefault count of hardest hit process: 6795
  93. Number of processes hit: 91
  94.  
  95.  
  96. _________________________________________________________________________________________________________
  97. PER CPU DATA
  98. _________________________________________________________________________________________________________
  99. CPU 0 Interrupt cycle time (s): 10.230314
  100. CPU 0 ISR highest execution time (µs): 217.055348
  101. CPU 0 ISR total execution time (s): 0.644187
  102. CPU 0 ISR count: 80040
  103. CPU 0 DPC highest execution time (µs): 1221.301617
  104. CPU 0 DPC total execution time (s): 1.529564
  105. CPU 0 DPC count: 717977
  106. _________________________________________________________________________________________________________
  107. CPU 1 Interrupt cycle time (s): 7.526844
  108. CPU 1 ISR highest execution time (µs): 56.854478
  109. CPU 1 ISR total execution time (s): 0.001920
  110. CPU 1 ISR count: 258
  111. CPU 1 DPC highest execution time (µs): 159.523632
  112. CPU 1 DPC total execution time (s): 0.006163
  113. CPU 1 DPC count: 1366
  114. _________________________________________________________________________________________________________
  115. CPU 2 Interrupt cycle time (s): 10.758405
  116. CPU 2 ISR highest execution time (µs): 30.657960
  117. CPU 2 ISR total execution time (s): 0.000390
  118. CPU 2 ISR count: 54
  119. CPU 2 DPC highest execution time (µs): 201.065920
  120. CPU 2 DPC total execution time (s): 0.117055
  121. CPU 2 DPC count: 33179
  122. _________________________________________________________________________________________________________
  123. CPU 3 Interrupt cycle time (s): 8.700665
  124. CPU 3 ISR highest execution time (µs): 0.0
  125. CPU 3 ISR total execution time (s): 0.0
  126. CPU 3 ISR count: 0
  127. CPU 3 DPC highest execution time (µs): 58.700871
  128. CPU 3 DPC total execution time (s): 0.002263
  129. CPU 3 DPC count: 563
  130. _________________________________________________________________________________________________________
  131. CPU 4 Interrupt cycle time (s): 4.821942
  132. CPU 4 ISR highest execution time (µs): 0.0
  133. CPU 4 ISR total execution time (s): 0.0
  134. CPU 4 ISR count: 0
  135. CPU 4 DPC highest execution time (µs): 367.959577
  136. CPU 4 DPC total execution time (s): 0.027523
  137. CPU 4 DPC count: 8662
  138. _________________________________________________________________________________________________________
  139. CPU 5 Interrupt cycle time (s): 5.844825
  140. CPU 5 ISR highest execution time (µs): 0.0
  141. CPU 5 ISR total execution time (s): 0.0
  142. CPU 5 ISR count: 0
  143. CPU 5 DPC highest execution time (µs): 114.116294
  144. CPU 5 DPC total execution time (s): 0.003628
  145. CPU 5 DPC count: 1022
  146. _________________________________________________________________________________________________________
  147. CPU 6 Interrupt cycle time (s): 5.246904
  148. CPU 6 ISR highest execution time (µs): 0.0
  149. CPU 6 ISR total execution time (s): 0.0
  150. CPU 6 ISR count: 0
  151. CPU 6 DPC highest execution time (µs): 187.577114
  152. CPU 6 DPC total execution time (s): 0.021805
  153. CPU 6 DPC count: 6651
  154. _________________________________________________________________________________________________________
  155. CPU 7 Interrupt cycle time (s): 6.518812
  156. CPU 7 ISR highest execution time (µs): 0.0
  157. CPU 7 ISR total execution time (s): 0.0
  158. CPU 7 ISR count: 0
  159. CPU 7 DPC highest execution time (µs): 81.015547
  160. CPU 7 DPC total execution time (s): 0.001702
  161. CPU 7 DPC count: 491
  162. _________________________________________________________________________________________________________
  163. CPU 8 Interrupt cycle time (s): 5.332799
  164. CPU 8 ISR highest execution time (µs): 0.0
  165. CPU 8 ISR total execution time (s): 0.0
  166. CPU 8 ISR count: 0
  167. CPU 8 DPC highest execution time (µs): 165.743159
  168. CPU 8 DPC total execution time (s): 0.022103
  169. CPU 8 DPC count: 6866
  170. _________________________________________________________________________________________________________
  171. CPU 9 Interrupt cycle time (s): 6.654507
  172. CPU 9 ISR highest execution time (µs): 0.0
  173. CPU 9 ISR total execution time (s): 0.0
  174. CPU 9 ISR count: 0
  175. CPU 9 DPC highest execution time (µs): 107.416667
  176. CPU 9 DPC total execution time (s): 0.004954
  177. CPU 9 DPC count: 1170
  178. _________________________________________________________________________________________________________
  179. CPU 10 Interrupt cycle time (s): 5.474850
  180. CPU 10 ISR highest execution time (µs): 0.0
  181. CPU 10 ISR total execution time (s): 0.0
  182. CPU 10 ISR count: 0
  183. CPU 10 DPC highest execution time (µs): 331.541667
  184. CPU 10 DPC total execution time (s): 0.040558
  185. CPU 10 DPC count: 11402
  186. _________________________________________________________________________________________________________
  187. CPU 11 Interrupt cycle time (s): 6.527640
  188. CPU 11 ISR highest execution time (µs): 0.0
  189. CPU 11 ISR total execution time (s): 0.0
  190. CPU 11 ISR count: 0
  191. CPU 11 DPC highest execution time (µs): 83.810945
  192. CPU 11 DPC total execution time (s): 0.006133
  193. CPU 11 DPC count: 1699
  194. _________________________________________________________________________________________________________
  195.  
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