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2026-03-11 - 20:02
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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 rackeslot6.osadl.org (updated Wed Mar 11, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21854249910695,8cyclictest266-21systemd-journal09:50:001
21854249910288,11cyclictest2201322-21apt-get08:00:011
2185424999991,5cyclictest2207275-21kworker/u8:0+events_unbound08:20:001
2185424999786,9cyclictest2201322-21apt-get08:00:031
2185424999786,9cyclictest2201322-21apt-get08:00:021
2185424999584,8cyclictest2243723-21latency_hist10:10:011
2185424999384,6cyclictest2229442-21kworker/u8:1+flush-179:009:35:221
2185424999081,6cyclictest2208245-21kworker/u8:2+events_unbound09:20:191
2185424998979,7cyclictest2207275-21kworker/u8:0+flush-179:008:55:201
2185424998775,10cyclictest2206351-21apt-get08:15:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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