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2026-04-03 - 13:53
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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 Fri Apr 03, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
157526199129119,8cyclictest1656869-21apt-get23:25:031
157525699117108,7cyclictest1668282-40mandb00:00:000
15752619910293,7cyclictest1656980-21gpgv23:25:011
1575256999993,4cyclictest1591106-21kworker/u8:3+events_unbound20:20:010
1575256999993,4cyclictest1591106-21kworker/u8:3+events_unbound20:20:010
1575261999686,7cyclictest1652072-21latency_hist23:10:021
1575256999688,6cyclictest1620016-21kworker/u8:0+flush-179:021:40:010
1575256999185,5cyclictest1604094-21kworker/u8:0+events_unbound21:10:240
1575256998981,6cyclictest1620016-21kworker/u8:0+flush-179:021:30:260
1575256998980,6cyclictest1648880-21latency_hist23:00:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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