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2026-07-01 - 01:41
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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 30, 2026 12:46:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
285388424390,12sleep4421ksoftirqd/407:05:144
285627899384383,1cyclictest0-21swapper/412:31:024
285627899383382,1cyclictest2902218-21kworker/4:211:45:024
285627899383382,1cyclictest2902218-21kworker/4:211:30:024
285627899381380,1cyclictest2902218-21kworker/4:210:37:024
2856278993810,380cyclictest2902218-21kworker/4:208:25:024
285627899380379,1cyclictest0-21swapper/412:06:024
285627899379378,1cyclictest3146562-21kworker/4:107:44:034
285627899379378,1cyclictest3049658-21kworker/4:112:36:024
285627899379378,1cyclictest2902218-21kworker/4:211:36:024
285627899379378,1cyclictest0-21swapper/409:35:034
285627899379377,1cyclictest2992487-21kworker/4:111:19:024
285627899378377,1cyclictest2902218-21kworker/4:211:52:024
285627899378377,1cyclictest0-21swapper/411:09:024
285627899378377,1cyclictest0-21swapper/410:03:024
285627899378376,1cyclictest2902218-21kworker/4:212:12:024
285627899377376,1cyclictest3146562-21kworker/4:107:26:024
285627899377376,1cyclictest0-21swapper/408:34:034
285627899377376,1cyclictest0-21swapper/407:18:024
285627899376375,1cyclictest3146562-21kworker/4:107:57:024
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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