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2026-03-23 - 21:25
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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 rackcslot4.osadl.org (updated Mon Mar 23, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4481592269193,28sleep10-21swapper/119:05:581
4481612257215,28sleep00-21swapper/019:05:590
6250392470,1sleep10-21swapper/100:09:211
44867599467,9cyclictest476991-21sendmail-msp20:19:591
179699460,3rtkit-daemon0-21swapper/122:57:331
6447052440,1sleep00-21swapper/000:36:450
44867599449,5cyclictest26-21ksoftirqd/121:20:001
179699440,3rtkit-daemon0-21swapper/123:12:041
179699440,3rtkit-daemon0-21swapper/121:11:291
44867599438,9cyclictest26-21ksoftirqd/121:05:001
44867599437,8cyclictest468758-21sendmail-msp20:00:001
448675994314,5cyclictest26-21ksoftirqd/123:40:011
448675994312,5cyclictest26-21ksoftirqd/122:20:001
448675994312,18cyclictest26-21ksoftirqd/100:00:011
179699430,3rtkit-daemon0-21swapper/121:06:561
4611062420,2sleep00-21swapper/019:40:110
448675994218,5cyclictest26-21ksoftirqd/122:35:011
4530812410,4sleep0453080-21grep19:20:000
448675994110,5cyclictest26-21ksoftirqd/119:25:011
179699410,3rtkit-daemon0-21swapper/121:40:391
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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