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2026-03-18 - 10:34
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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
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rackeslot3.osadl.org (updated Wed Mar 18, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3831429997242,29cyclictest3998249-21kworker/1:323:50:131
3831429997240,31cyclictest3981433-21kworker/1:123:36:221
383142999691,66cyclictest0-21swapper/120:25:151
3831429996841,26cyclictest3918788-21kworker/1:322:10:151
3831429996840,27cyclictest3929258-21kworker/1:222:35:131
3831429996741,25cyclictest3924029-21kworker/1:022:30:151
3831429996738,28cyclictest3964998-21kworker/1:323:10:131
3831429996738,28cyclictest3964998-21kworker/1:323:10:131
3831429996738,27cyclictest3882684-21kworker/1:021:40:141
383142999670,65cyclictest0-21swapper/123:05:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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