Ubiquitous Component (Kernel Space)

This is a kernel space counterpart of Ubiquitous Component (Volume 4, page 94) pattern. Such a component (especially when it is Top Module, Volume 6, page 62) can be a sign of Wait Chain(s) (Volume 1, page 482) and Blocking Module (Volume 6, page 54) and if it is present in the same process names - a sign of Distributed Wait Chain (page 182).

0: kd> !stacks 0 ModuleA
Proc.Thread  .Thread  Ticks   ThreadState Blocker

                            [fffffa800e673b30 svchost.exe]
 534.006240  fffffa801388f5f0 fffd41d9 Blocked    ModuleA+0x12468

                            [fffffa800e705b30 svchost.exe]
  630.000e14  fffffa800edacb50 fffdcf7a Blocked     ModuleA+0x12468
  630.000f04  fffffa8012c2fb50 fffdcf49 Blocked     ModuleA+0x12468
  630.006610  fffffa80134f5b50 fffdcf46 Blocked     ModuleA+0x12468
  630.001cfc  fffffa800f55a2d0 fffdcf44 Blocked     ModuleA+0x12468
  630.003db8  fffffa80121f1540 fffdcf43 Blocked     ModuleA+0x12468
  630.000b9c  fffffa80133d1780 fffdcf3c Blocked     ModuleA+0x12468
  630.0041c4  fffffa8013c77b50 fffdcf43 Blocked     ModuleA+0x12468
  630.00641c  fffffa8012476b50 fffdcf43 Blocked     ModuleA+0x12468
  630.006424  fffffa8013207b50 fffdcf40 Blocked     ModuleA+0x12468
  630.002fcc  fffffa80128f9060 fffdcf3e Blocked     ModuleA+0x12468
  630.003de8  fffffa80139edb50 fffdcf3d Blocked     ModuleA+0x12468
  630.0062c4  fffffa800f5ff2d0 fffdcf3c Blocked     ModuleA+0x12468
  630.0065e8  fffffa80139dcb50 fffdcf3b Blocked     ModuleA+0x12468
  630.004524  fffffa8011e51b50 fffdcf3a Blocked     ModuleA+0x12468
  630.004570  fffffa801346b060 fffdcf39 Blocked     ModuleA+0x12468
  630.00173c  fffffa8010b99b50 fffdcf39 Blocked     ModuleA+0x12468

                             [fffffa800f63db30 iexplore.exe]
 24c4.0024c8  fffffa800fe854e0 fffcb6cf Blocked    ModuleA+0x12468

                             [fffffa8010b9ab30 explorer.exe]
 2b64.0043d0  fffffa8012e8ab00 fffd9095 Blocked    ModuleA+0x12468

                             [fffffa800fe55060 explorer.exe]
 2c80.002e58  fffffa8012e75060 fffba7af Blocked    ModuleA+0x12468

                             [fffffa8010c54b30 iexplore.exe]
 2e3c.002e98  fffffa8010c75620 fffcbb7f Blocked    ModuleA+0x12468

                             [fffffa80111c3720 iexplore.exe]
 32d8.003230  fffffa80111b1b00 fffd41d9 Blocked    ModuleA+0x12468

                             [fffffa80110cb690 iexplore.exe]
 2e74.002854  fffffa8011121b00 fffbe8a4 Blocked    ModuleA+0x12468

                             [fffffa801146cb30 OUTLOOK.EXE]
 35cc.0035e8  fffffa8013831b00 fffaf33a Blocked    ModuleA+0x12468

                             [fffffa80105a5640 OUTLOOK.EXE]
 3858.00385c  fffffa801133ab00 fffd3691 Blocked    ModuleA+0x12468

                             [fffffa8011998060 explorer.exe]
 3d70.004a0c  fffffa80139ddb00 fffd0482 Blocked    ModuleA+0x12468

                             [fffffa8010ff5850 OUTLOOK.EXE]
 3540.000458  fffffa8011052b00 fffbd007 Blocked    ModuleA+0x12468

                             [fffffa8011d3d060 OUTLOOK.EXE]
 49f8.0049fc  fffffa8011c78060 fffdbbf9 Blocked    ModuleA+0x12468

                             [fffffa801241b060 OUTLOOK.EXE]
 4888.005af0  fffffa8012e8eab0 fffae442 Blocked    ModuleA+0x12468
 4888.003d24  fffffa800eca7b00 fffae443 Blocked    ModuleA+0x12468

                             [fffffa8012687b30 explorer.exe]
 5048.0051fc  fffffa801129cb00 fffca8bf Blocked    ModuleA+0x12468

                             [fffffa8011c1e060 OUTLOOK.EXE]
 52c4.00117c  fffffa80130f8710 fffaa157 Blocked    ModuleA+0x12468
 52c4.0045fc  fffffa801374f060 fffaa15e Blocked    ModuleA+0x12468

                             [fffffa8011c42b30 explorer.exe]
 5898.0001ec  fffffa80137a1b00 fffd8da0 Blocked    ModuleA+0x12468

                             [fffffa8012e04b30 OUTLOOK.EXE]
 5a74.004954  fffffa8012e05060 fffa9ff8 Blocked    ModuleA+0x12468

                             [fffffa8010908b30 spoolsv.exe]
 2724.004190  fffffa8011ea1060 fffdcafb Blocked    ModuleA+0x12468

                             [fffffa801206eb30 WerFault.exe]
 3e50.005424  fffffa8013c5eb00 fffdcf39 Blocked    ModuleA+0x12468

                            [fffffa800f8cf2a0 WerFault.exe]
  9f4.00570c  fffffa8013c8ab00 fffdca9f Blocked    ModuleA+0x12468

                             [fffffa8013af1060 WerFault.exe]
 3c74.002b80  fffffa8013c5c060 fffd9dc8 Blocked    ModuleA+0x12468

                             [fffffa800f8053a0 WINWORD.EXE]
 3dd0.0066a8  fffffa800ce618c0 fffd7c02 Blocked    ModuleA+0x12468

                             [fffffa8010b66b30 WINWORD.EXE]
 62a4.001934  fffffa801368c430 fffd7ce7 Blocked    ModuleA+0x12468

                             [fffffa80141dc060 WerFault.exe]
 17d0.0052e4  fffffa801347a060 fffd57b8 Blocked    ModuleA+0x12468

                             [fffffa8012629760 WerFault.exe]
 621c.005b64  fffffa8011e395d0 fffc8dc2 Blocked    ModuleA+0x12468

                             [fffffa80131a75d0 explorer.exe]
 4884.002b34  fffffa8013dc3b00 fffd67bc Blocked    ModuleA+0x12468


 [...]


 Threads Processed: 5948