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2026-05-19 - 01:02
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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
Characteristics of the 20 highest latencies:
System rackcslot6.osadl.org (updated Mon May 18, 2026 12:46:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
398807424190,3sleep00-21swapper/007:05:160
399001499381380,1cyclictest4168298-21kworker/6:012:25:026
399001499381380,1cyclictest4114148-21kworker/6:010:40:026
3990014993810,380cyclictest0-21swapper/611:55:026
3990014993810,380cyclictest0-21swapper/607:55:016
399001499380379,1cyclictest4017869-21kworker/6:208:30:016
3990014993800,380cyclictest276-1kworker/6:1H09:31:016
3990014993800,379cyclictest0-21swapper/609:40:016
3990014993800,379cyclictest0-21swapper/608:05:026
3990014993800,379cyclictest0-21swapper/608:05:016
399001499379378,1cyclictest4114148-21kworker/6:010:36:026
399001499379378,1cyclictest4099115-21kworker/6:210:30:016
399001499379378,1cyclictest0-21swapper/611:51:026
399001499379378,1cyclictest0-21swapper/609:19:016
399001499379377,1cyclictest4141225-21kworker/6:111:31:016
3990014993790,379cyclictest0-21swapper/609:00:026
399001499378377,1cyclictest4114148-21kworker/6:010:52:016
399001499378377,1cyclictest4047968-21kworker/6:108:54:016
399001499378377,1cyclictest0-21swapper/610:18:026
399001499378376,1cyclictest0-21swapper/609:26:016
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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