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2025-11-19 - 16:09
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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 Nov 19, 2025 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1991399330,28cyclictest0-21swapper/311:10:143
19907993228,3cyclictest0-21swapper/010:10:010
1990799320,0cyclictest7936-21apt-get10:10:130
19913993126,4cyclictest19639-21apt-get10:35:173
1991399310,30cyclictest14638-21ls10:25:013
1990899310,27cyclictest0-21swapper/108:50:111
19913992925,3cyclictest0-21swapper/310:10:133
19913992923,5cyclictest0-21swapper/310:10:003
1991399290,28cyclictest0-21swapper/309:50:133
1991399290,28cyclictest0-21swapper/308:45:123
19912992928,1cyclictest6758-21awk12:25:012
19912992928,1cyclictest10257-21apt-get10:15:132
1991299290,28cyclictest12002-21apt-get12:35:142
1991299290,28cyclictest0-21swapper/210:55:132
19913992828,0cyclictest0-21swapper/309:05:133
19913992826,2cyclictest0-21swapper/309:25:013
1991399280,27cyclictest0-21swapper/309:00:153
1991399280,0cyclictest0-21swapper/312:35:153
1991399280,0cyclictest0-21swapper/312:20:173
19912992827,1cyclictest15842-21apt-get11:35:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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