In higher frequency timing logs like lock, the smaller units seem to be more frequent. Debug build on a slow system:
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 started
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 completed (253.02μs)
2022-04-19T17:59:03Z [msghand] Enter: lock contention cs_main, net_processing.cpp:4196 started
2022-04-19T17:59:03Z [msghand] Enter: lock contention cs_main, net_processing.cpp:4196 completed (14.28ms)
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 started
2022-04-19T17:59:03Z [scheduler] Enter: lock contention ::cs_main, validation.cpp:5151 started
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 completed (157.08ms)
2022-04-19T17:59:03Z [msghand] Enter: lock contention ::cs_main, validation.cpp:5151 started
2022-04-19T17:59:03Z [scheduler] Enter: lock contention ::cs_main, validation.cpp:5151 completed (24.14ms)
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 started
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 completed (10.48μs)
2022-04-19T17:59:03Z [msghand] Enter: lock contention ::cs_main, validation.cpp:5151 completed (7.92ms)
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 started
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 completed (5.57μs)
2022-04-19T17:59:03Z [msghand] Enter: lock contention ::cs_main, validation.cpp:5151 started
2022-04-19T17:59:03Z [msghand] Enter: lock contention ::cs_main, validation.cpp:5151 completed (85.71μs)
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 started
2022-04-19T17:59:03Z [loadblk] Enter: lock contention cs_main, validation.cpp:4672 completed (4.68μs)
2022-04-19T17:59:03Z [msghand] Enter: lock contention m_mutex, random.cpp:416 started
2022-04-19T17:59:03Z [msghand] Enter: lock contention m_mutex, random.cpp:416 completed (62.23μs)
2022-04-19T17:59:03Z [msghand] Enter: lock contention cs_main, net_processing.cpp:4668 started
2022-04-19T17:59:03Z [msghand] Enter: lock contention cs_main, net_processing.cpp:4668 completed (911.14μs)