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2025-12-29 - 17:28
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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 Mon Dec 29, 2025 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1267799300,29cyclictest21629-21awk10:55:012
1267899290,28cyclictest0-21swapper/307:50:123
1267799290,1cyclictest4486-21cron09:10:002
1267799290,1cyclictest31356-21cron07:50:002
12676992927,1cyclictest307-21systemd-journal11:40:011
1267699290,1cyclictest25510-21apt-get08:45:111
1267599290,28cyclictest16168-21munin-run09:35:000
12678992828,0cyclictest0-21swapper/308:10:143
12678992828,0cyclictest0-21swapper/307:45:133
12678992827,1cyclictest5037-21sendmail-msp10:20:003
12678992827,1cyclictest0-21swapper/310:50:113
12678992826,1cyclictest28657-21cron11:10:003
1267899280,27cyclictest0-21swapper/309:50:123
1267899280,27cyclictest0-21swapper/309:50:123
1267899280,0cyclictest0-21swapper/310:35:113
12677992828,0cyclictest4708-21apt-get12:35:132
12677992828,0cyclictest15251-21apt-get07:15:132
12677992828,0cyclictest0-21swapper/211:55:122
12677992827,1cyclictest12296-21apt-get10:35:112
1267799280,28cyclictest0-21swapper/210:20:102
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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