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2026-05-30 - 14:50
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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 Sat May 30, 2026 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15200993028,1cyclictest14515-21idleruntime-cro21:25:013
1519999300,2cyclictest27942-21cron20:45:002
1519999300,29cyclictest21732-21sh22:50:012
1519899300,29cyclictest307-21systemd-journal20:35:001
1519899300,29cyclictest24466-21cron19:30:011
15200992927,1cyclictest621-21dbus-daemon20:50:003
1520099290,28cyclictest11859-21apt-get23:35:123
1519999290,28cyclictest2870-21apt-get00:25:152
15198992927,1cyclictest621-21dbus-daemon20:05:011
15198992927,1cyclictest19456-21apt-get21:35:131
1519899290,28cyclictest9276-21munin-run23:30:011
15197992927,1cyclictest307-21systemd-journal00:15:010
1519799290,28cyclictest5189-21apt-get00:30:130
1519799290,28cyclictest0-21swapper/021:00:110
1519799290,28cyclictest0-21swapper/019:10:110
15200992828,0cyclictest25914-21apt-get20:40:113
1520099280,28cyclictest0-21swapper/320:10:123
1520099280,0cyclictest0-21swapper/322:50:123
1520099280,0cyclictest0-21swapper/321:40:123
1520099280,0cyclictest0-21swapper/300:15:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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