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2026-06-28 - 05:55
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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 rack8slot4.osadl.org (updated Sun Jun 28, 2026 00:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40045612228168,19sleep20-21swapper/219:05:292
40048742226163,18sleep40-21swapper/419:09:584
40046712225166,19sleep10-21swapper/119:07:051
40045752224162,19sleep70-21swapper/719:05:437
40046882214185,19sleep60-21swapper/619:07:196
40047202211183,19sleep00-21swapper/019:07:450
40045642207178,19sleep50-21swapper/519:05:325
40047232206178,18sleep30-21swapper/319:07:483
4005074994745,1cyclictest0-21swapper/023:55:030
400507499330,31cyclictest4121386-21cpuspeed_turbos22:40:030
4005091993228,3cyclictest4067786-21cron21:05:017
4005091993228,3cyclictest4067786-21cron21:05:017
400509199320,31cyclictest4143515-21/usr/sbin/munin23:20:037
4005088993227,4cyclictest4098439-21cron22:00:016
400508499320,31cyclictest4087723-21apt-get21:40:034
400509199310,3cyclictest1-21systemd00:00:017
400508699310,30cyclictest4037121-21apt-get20:10:045
400508499310,28cyclictest4023248-21apt-get19:45:024
400508499310,28cyclictest0-21swapper/421:50:034
4005076993130,1cyclictest4046448-21expr20:25:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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