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2026-05-20 - 00:13
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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 rackeslot6.osadl.org (updated Tue May 19, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17653099119107,9cyclictest1213033-21systemd-journal09:20:011
17653099119107,9cyclictest1213033-21systemd-journal09:20:011
17652899114104,7cyclictest274908-21latency_hist12:15:010
1765309910393,7cyclictest252330-21latency_hist11:05:001
176528999887,8cyclictest262418-21/usr/sbin/munin11:35:220
176528999786,8cyclictest279687-21latency_hist12:30:010
176528999686,7cyclictest282868-21latency_hist12:40:000
176530999587,5cyclictest235057-21kworker/u8:3+flush-179:010:15:251
176528999279,10cyclictest1213033-21systemd-journal08:40:000
176530999080,8cyclictest212332-21kworker/u8:3+flush-179:009:09:591
176530998980,7cyclictest225321-21kworker/u8:3+flush-179:009:50:001
176530998779,6cyclictest235057-21kworker/u8:3+flush-179:010:14:591
176530998476,6cyclictest240715-21kworker/u8:1+flush-179:010:30:121
176530998476,5cyclictest225321-21kworker/u8:3+events_unbound10:00:001
176530998474,8cyclictest186025-21kworker/u8:0+flush-179:008:15:001
176528998470,10cyclictest200646-21apt-get08:25:010
176530998374,6cyclictest240715-21kworker/u8:1+flush-179:010:50:251
176528998271,8cyclictest240715-21kworker/u8:1+events_unbound10:35:010
176530998174,5cyclictest186025-21kworker/u8:0+flush-179:008:55:001
176530998173,6cyclictest250793-21kworker/u8:0+flush-179:011:25:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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