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2026-01-11 - 13:16
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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 rackeslot5.osadl.org (updated Sun Jan 11, 2026 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
613799316,25cyclictest0-21swapper/100:00:241
6137993128,2cyclictest307-21systemd-journal23:30:001
613799310,2cyclictest307-21systemd-journal21:00:001
613999300,29cyclictest649-21gdbus22:40:003
6137993028,1cyclictest1-21systemd00:00:011
6135993023,6cyclictest17995-21cron00:10:010
6139992927,1cyclictest13610-21cron20:35:003
613899290,28cyclictest32098-21perf20:05:012
6137992927,1cyclictest0-21swapper/119:20:011
613599290,28cyclictest32577-21apt-get21:15:100
613599290,1cyclictest20659-21idleruntime-cro20:50:010
613999280,27cyclictest0-21swapper/321:45:113
613999280,0cyclictest16301-21apt-get20:40:123
6138992828,0cyclictest0-21swapper/223:00:102
6138992828,0cyclictest0-21swapper/220:30:112
613899280,28cyclictest0-21swapper/219:50:112
613899280,1cyclictest19995-21apt-get23:05:132
613899280,0cyclictest0-21swapper/223:20:012
613899280,0cyclictest0-21swapper/222:15:122
613899280,0cyclictest0-21swapper/222:15:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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