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2026-06-02 - 15:02
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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 Tue Jun 02, 2026 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2153399321,30cyclictest1-21systemd23:50:012
21537993028,1cyclictest307-21systemd-journal20:05:013
2153399300,29cyclictest1552-21awk20:45:002
2153199300,2cyclictest15341-21awk20:05:011
21537992928,1cyclictest621-21dbus-daemon22:35:013
2153799290,28cyclictest0-21swapper/321:50:123
2153799290,1cyclictest19970-21cron20:15:013
2153399290,28cyclictest8589-21chrt19:50:132
2153399290,28cyclictest8034-21munin-run00:25:012
2153399290,28cyclictest0-21swapper/223:35:132
2153199290,28cyclictest29035-21apt-get00:00:121
2153199290,28cyclictest0-21swapper/122:50:131
21527992928,0cyclictest13782-21apt-get21:10:120
2152799290,28cyclictest0-21swapper/021:05:020
2152799290,1cyclictest6749-21sh22:05:000
2152799290,1cyclictest621-21dbus-daemon23:20:010
21537992828,0cyclictest0-21swapper/320:50:113
21537992828,0cyclictest0-21swapper/319:35:133
21537992827,1cyclictest9115-21cron22:09:593
2153799280,28cyclictest31939-21apt-get20:40:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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