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2025-11-14 - 07:35
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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 rack1slot8.osadl.org (updated Fri Nov 14, 2025 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2389499445384,54cyclictest0-21swapper/019:10:110
2389599441366,48cyclictest0-21swapper/119:53:501
2389599359300,45cyclictest0-21swapper/119:10:111
238949910413,86cyclictest0-21swapper/022:31:000
23895999920,62cyclictest0-21swapper/120:45:591
2389499989,84cyclictest0-21swapper/022:04:590
216899980,4rtkit-daemon2167-21rtkit-daemon00:16:591
216899960,3rtkit-daemon2167-21rtkit-daemon19:21:541
23894998777,5cyclictest31862-21ssh21:59:590
2389499864,60cyclictest0-21swapper/019:53:500
216899840,4rtkit-daemon2167-21rtkit-daemon20:55:151
23894998256,20cyclictest0-21swapper/021:17:000
216899820,5rtkit-daemon2167-21rtkit-daemon23:24:431
216899820,5rtkit-daemon2167-21rtkit-daemon23:24:431
277622810,3sleep0221rcuc/021:51:010
216899800,5rtkit-daemon2167-21rtkit-daemon22:59:121
216899780,4rtkit-daemon2167-21rtkit-daemon23:49:480
216899780,4rtkit-daemon2167-21rtkit-daemon19:48:041
216899770,4rtkit-daemon2167-21rtkit-daemon23:06:081
200802770,4sleep020081-21ssh00:27:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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