Differential canary tid=17 (sub_821748F0 worker) vs ours tid=13

canary tid=17 total events: 4140, ours tid=13 total: 435
canary tid=17 duration: 1.9378s..2.0918s (154ms, terminates)
ours tid=13 duration: until wedge, never terminates

kernel.call                                     canary     ours    delta
  RtlEnterCriticalSection                            607       58     +549
  RtlLeaveCriticalSection                            607       58     +549
  NtClose                                             19        2      +17
  NtCreateEvent                                       18        3      +15
  NtDuplicateObject                                   16        2      +14
  RtlInitAnsiString                                   11        1      +10
  NtWaitForSingleObjectEx                             11        2       +9
  RtlInitializeCriticalSectionAndSpinCount            15        6       +9
  NtQueryFullAttributesFile                            9        1       +8
  NtReleaseSemaphore                                   9        1       +8
  RtlNtStatusToDosError                                9        1       +8
  NtSetEvent                                           8        1       +7
  KeTlsSetValue                                        2        0       +2
  NtCreateFile                                         2        0       +2
  ExCreateThread                                       1        0       +1
  ExTerminateThread                                    1        0       +1
  KeQueryPerformanceFrequency                          0        1       -1
  KeTlsGetValue                                        1        0       +1
  ExGetXConfigSetting                                  1        1       +0
  KeSetAffinityThread                                  1        1       +0
  ObDereferenceObject                                  1        1       +0
  ObReferenceObjectByHandle                            1        1       +0
  XNotifyPositionUI                                    1        1       +0