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2025-12-31 - 08:24
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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 Dec 31, 2025 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6891993028,1cyclictest0-21swapper/123:00:001
6897992927,1cyclictest307-21systemd-journal20:15:023
6897992927,1cyclictest307-21systemd-journal20:15:013
689799290,1cyclictest29730-21apt-get23:25:133
6895992926,2cyclictest32741-21sendmail-msp00:40:012
689599290,28cyclictest24845-21apt-get22:05:132
689199290,28cyclictest30692-21apt-get00:35:141
689199290,1cyclictest0-21swapper/120:00:011
688699290,28cyclictest21193-21munin-run19:40:010
688699290,28cyclictest0-21swapper/021:35:130
6897992828,0cyclictest0-21swapper/319:40:153
6897992827,1cyclictest18852-21munin-run19:35:023
689799280,28cyclictest0-21swapper/300:35:133
689799280,27cyclictest2268-21apt-get23:35:143
689799280,0cyclictest0-21swapper/321:00:113
6895992828,0cyclictest16786-21apt-get19:30:142
6895992828,0cyclictest0-21swapper/219:15:102
689599280,1cyclictest1708-21munin-run23:35:022
689599280,0cyclictest29485-21apt-get22:15:122
689599280,0cyclictest25063-21apt-get23:15:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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