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2026-04-24 - 08:07
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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 Fri Apr 24, 2026 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4284993229,2cyclictest649-21gdbus21:05:003
427999300,29cyclictest307-21systemd-journal21:15:012
427999300,29cyclictest28364-21cron00:35:012
427999300,29cyclictest26919-21cron22:15:002
428499290,29cyclictest0-21swapper/300:05:133
428499290,1cyclictest0-21swapper/323:20:013
428499290,1cyclictest0-21swapper/321:40:003
427999290,28cyclictest14138-21apt-get19:30:112
427599290,28cyclictest19634-21apt-get20:50:121
427599290,28cyclictest13876-21munin-run19:30:011
4284992827,1cyclictest32705-21apt-get23:35:123
4284992827,0cyclictest0-21swapper/321:55:143
4284992826,1cyclictest621-21dbus-daemon21:55:003
428499280,0cyclictest0-21swapper/323:40:113
428499280,0cyclictest0-21swapper/300:30:133
4279992828,0cyclictest0-21swapper/222:30:112
4279992828,0cyclictest0-21swapper/200:05:122
4279992827,1cyclictest9317-21cron23:55:012
427999280,0cyclictest16466-21apt-get19:35:122
4275992826,1cyclictest621-21dbus-daemon20:50:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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