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2026-08-21 - 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 10 highest latencies:
System rackeslot6.osadl.org (updated Thu Aug 20, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
132338599152140,9cyclictest1213033-21systemd-journal07:40:001
132338599144134,7cyclictest1362710-21latency_hist09:10:021
132338599140128,9cyclictest1405641-21latency_hist11:20:021
132338199139129,8cyclictest1412272-21latency_hist11:40:000
132338199139129,7cyclictest1395866-21kworker/u8:2+events_unbound10:55:000
132338199138126,5cyclictest1390775-21kworker/u8:3+events_unbound10:35:000
132338599133105,22cyclictest1392387-21apt-get10:40:021
132338199126115,8cyclictest1395832-21latency_hist10:50:020
132338199126115,8cyclictest1395832-21latency_hist10:50:010
132338199125117,5cyclictest1352945-21kworker/u8:1+flush-179:008:40:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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