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2026-05-20 - 08:42
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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
Characteristics of the 20 highest latencies:
System rackeslot2.osadl.org (updated Wed May 20, 2026 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
354541722000,2sleep30-21swapper/322:00:063
368553821500,2sleep30-21swapper/323:30:093
339913221010,2sleep30-21swapper/320:15:013
36211382720,2sleep30-21swapper/322:50:003
37044182340,1sleep13704419-21sh23:44:171
33424322330,2sleep3551rcuc/319:30:013
3314757992522,2cyclictest3436817-21systemd20:45:001
37635232240,1sleep20-21swapper/200:20:142
3314756992315,7cyclictest0-21swapper/019:30:000
3314758992220,1cyclictest0-21swapper/222:15:022
3314757992219,2cyclictest3590129-21apt-get22:30:031
3314757992219,2cyclictest3449714-21sh20:55:011
3314756992219,2cyclictest3789212-21diskmemload00:40:000
3314756992219,2cyclictest3606043-21systemd-run22:40:020
3314756992210,6cyclictest0-21swapper/023:30:020
331475799218,2cyclictest134050irq/121-eno121:48:151
3314757992118,2cyclictest1290-21dbus-daemon21:30:001
3314756992118,2cyclictest3513923-21runrttasks21:40:010
3314756992118,2cyclictest3513923-21runrttasks21:40:010
331475699211,14cyclictest3726110-21/usr/sbin/munin23:55:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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