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2026-03-18 - 10:26
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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 Wed Mar 18, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
350757199112104,6cyclictest3558645-21apt-get21:50:031
350756899109101,6cyclictest3515393-21kworker/u8:1+events_unbound20:00:000
35075719910283,13cyclictest266-21systemd-journal22:25:001
3507568999991,7cyclictest3570066-21kworker/u8:0+flush-179:023:30:240
3507571999785,10cyclictest3560451-21kworker/u8:1+flush-179:022:20:001
3507571999785,10cyclictest3560451-21kworker/u8:1+flush-179:022:20:001
3507568999782,11cyclictest266-21systemd-journal00:00:000
3507571999585,7cyclictest3510637-21latency_hist19:20:001
3507571999381,8cyclictest3587506-21kworker/u8:1+flush-179:023:25:001
3507571999281,8cyclictest3592534-21/usr/sbin/munin23:35:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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