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2025-12-27 - 14:52
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rack3slot6.osadl.org (updated Sat Dec 27, 2025 12:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
62449910743,19cyclictest14-21ksoftirqd/008:35:140
62449910714,21cyclictest0-21swapper/012:20:150
62449910613,24cyclictest0-21swapper/010:20:160
62449910613,24cyclictest0-21swapper/009:40:160
62449910416,19cyclictest0-21swapper/007:50:130
62449910414,22cyclictest0-21swapper/007:15:140
62449910412,23cyclictest0-21swapper/008:00:140
62449910312,24cyclictest0-21swapper/008:45:140
62449910216,18cyclictest0-21swapper/009:30:120
62449910212,20cyclictest0-21swapper/008:50:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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