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2025-11-24 - 06:00
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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 Mon Nov 24, 2025 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17730519910797,7cyclictest1878321-21latency_hist00:35:000
17730529910082,8cyclictest1777793-21latency_hist19:25:001
1773052999783,10cyclictest271-21systemd-journal00:09:591
1773052999684,8cyclictest1863680-21latency_hist23:50:001
1773052998777,7cyclictest1843001-21latency_hist22:45:011
1773052998476,6cyclictest1854320-21kworker/u8:1+flush-179:023:30:251
1773052998171,7cyclictest1829751-21latency_hist22:05:011
1773051997967,10cyclictest1868523-21apt-get00:05:010
1773052997766,8cyclictest1825208-21/usr/sbin/munin21:50:231
1773051997771,5cyclictest1787565-21kworker/u8:0+events_unbound20:05:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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