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2025-11-09 - 13:46
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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 Sun Nov 09, 2025 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
142999300,0cyclictest0-21swapper/321:50:133
1425993028,1cyclictest2206-21cron21:30:012
142499300,1cyclictest303-21systemd-journal23:55:001
1429992927,1cyclictest303-21systemd-journal20:50:013
1429992927,1cyclictest15502-21munin-run00:15:003
142999290,28cyclictest0-21swapper/300:05:133
142599290,28cyclictest6333-21apt-get19:20:152
142599290,28cyclictest25528-21apt-get22:20:022
142599290,28cyclictest0-21swapper/220:40:132
142499290,1cyclictest20841-21cron22:10:011
142399290,1cyclictest0-21swapper/022:10:120
142999280,0cyclictest32297-21apt-get20:15:143
142999280,0cyclictest0-21swapper/323:40:133
142999280,0cyclictest0-21swapper/321:45:123
142999280,0cyclictest0-21swapper/321:10:123
142599280,0cyclictest21135-21apt-get22:10:122
1424992828,0cyclictest0-21swapper/122:55:131
142499280,27cyclictest0-21swapper/100:20:121
142499280,1cyclictest13879-21apt-get20:45:111
1423992828,0cyclictest0-21swapper/023:55:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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