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2026-05-24 - 11:39
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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 May 24, 2026 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2896199310,30cyclictest31671-21idleruntime-cro23:50:012
28965993028,1cyclictest6912-21perf21:50:013
2896199300,2cyclictest15935-21cron21:00:012
2896199300,29cyclictest621-21dbus-daemon20:10:012
2896199300,29cyclictest27652-21awk21:25:002
2895699300,29cyclictest621-21dbus-daemon20:40:001
2896599290,28cyclictest0-21swapper/320:45:123
2896199290,28cyclictest0-21swapper/219:55:132
2896199290,28cyclictest0-21swapper/200:25:132
28956992927,1cyclictest31676-21cron23:50:011
28956992927,1cyclictest307-21systemd-journal20:10:011
28956992927,1cyclictest27654-21cron21:25:001
2895699290,28cyclictest0-21swapper/120:15:151
2895699290,1cyclictest24638-21perf23:35:011
2896599280,28cyclictest17376-21perf23:20:013
2896599280,28cyclictest0-21swapper/323:10:123
2896599280,27cyclictest0-21swapper/323:35:113
2896599280,27cyclictest0-21swapper/323:05:123
28961992828,0cyclictest27389-21apt-get20:15:152
28961992828,0cyclictest0-21swapper/200:35:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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