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2026-06-19 - 05:32
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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 20 highest latencies:
System rack0slot5.osadl.org (updated Fri Jun 19, 2026 00:43:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3940357995520,551cyclictest0-21swapper/020:31:080
394040199527496,31cyclictest0-21swapper/1122:00:083
3940394995253,518cyclictest0-21swapper/1020:48:082
394038999508476,32cyclictest0-21swapper/920:50:0815
39403849950423,481cyclictest0-21swapper/719:33:0813
394036099499498,1cyclictest4025583-21kworker/1:2+i915-unordered20:50:081
39403579949645,30cyclictest0-21swapper/020:00:290
394040499486429,28cyclictest0-21swapper/1222:03:084
394036999484482,1cyclictest4081926-21kworker/3:1+i915-unordered22:04:089
3940384994800,480cyclictest0-21swapper/723:54:0813
39404179947424,30cyclictest0-21swapper/1521:12:527
39404099947124,29cyclictest0-21swapper/1321:14:295
39404099947123,29cyclictest0-21swapper/1321:08:295
39404099947123,28cyclictest0-21swapper/1322:32:295
39404099947122,30cyclictest0-21swapper/1320:26:305
394038999471470,1cyclictest3903389-21kworker/9:0+i915-unordered22:44:0815
394037599471441,30cyclictest0-21swapper/522:34:0811
39404179947024,30cyclictest0-21swapper/1521:32:537
39403949947022,29cyclictest0-21swapper/1020:09:532
39403949947022,29cyclictest0-21swapper/1020:09:532
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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