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2026-06-03 - 00:34
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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 Tue Jun 02, 2026 12:46:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119415999364363,1cyclictest0-21swapper/308:50:023
119415999364363,1cyclictest0-21swapper/308:50:023
119415999363362,1cyclictest0-21swapper/311:10:013
119415999363362,1cyclictest0-21swapper/308:35:013
119415999362361,1cyclictest1255115-21kworker/3:009:45:023
119415999362361,1cyclictest0-21swapper/310:10:023
119415999362361,1cyclictest0-21swapper/309:40:023
119415999362360,2cyclictest0-21swapper/308:11:023
119415999362360,1cyclictest0-21swapper/308:44:023
119415999362359,2cyclictest1303253-21kworker/3:112:15:013
119415999361360,1cyclictest1255115-21kworker/3:009:59:023
119415999361360,1cyclictest0-21swapper/311:40:013
119415999361360,1cyclictest0-21swapper/307:12:023
119415999360359,1cyclictest1303253-21kworker/3:111:45:023
119415999360359,1cyclictest1303253-21kworker/3:111:45:013
119415999360359,1cyclictest1255115-21kworker/3:010:07:023
119415999360359,1cyclictest1181659-21kworker/3:307:45:013
119415999360359,1cyclictest0-21swapper/310:25:023
119415999360359,1cyclictest0-21swapper/310:15:023
119415999360359,1cyclictest0-21swapper/307:59:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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