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2026-05-19 - 13:02
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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 Tue May 19, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29998169911888,27cyclictest3056493-21kworker/u8:0+flush-179:022:10:241
299981299112102,7cyclictest3007681-21latency_hist19:35:010
299981299112102,7cyclictest1213033-21systemd-journal00:00:010
299981699111103,5cyclictest3009274-21latency_hist19:40:011
29998129911191,17cyclictest3102714-21latency_hist00:30:010
29998129910090,8cyclictest3010874-21latency_hist19:45:010
2999812999989,7cyclictest1213033-21systemd-journal22:55:010
2999816999787,7cyclictest3080129-21latency_hist23:20:011
2999816999184,4cyclictest3030582-21kworker/u8:2+flush-179:021:00:231
2999812998981,6cyclictest1213033-21systemd-journal23:05:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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