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2026-04-30 - 09:21
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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 Wed Apr 29, 2026 12:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3122993231,1cyclictest0-21swapper/011:55:210
312799317,13cyclictest0-21swapper/209:35:192
312299310,30cyclictest307-21systemd-journal07:15:010
312899300,29cyclictest621-21dbus-daemon09:35:003
3127993028,1cyclictest7716-21cron07:20:012
3127993028,1cyclictest20973-21cron08:55:002
3127992927,1cyclictest31658-21apt-get11:35:132
312799290,28cyclictest0-21swapper/209:50:002
312799290,1cyclictest0-21swapper/210:15:122
312499290,28cyclictest0-21swapper/109:00:121
3122992926,2cyclictest9525-21sendmail-msp09:40:000
312299290,28cyclictest30819-21apt-get10:25:110
312299290,28cyclictest11860-21idleruntime-cro09:45:000
312299290,1cyclictest21781-21perf11:15:010
3128992828,0cyclictest0-21swapper/307:15:133
3128992825,2cyclictest625-21avahi-daemon08:40:003
312899280,0cyclictest0-21swapper/308:55:123
3127992828,0cyclictest1973-21apt-get08:15:122
3127992828,0cyclictest0-21swapper/208:35:112
312799280,0cyclictest5133-21apt-get10:40:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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