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2026-05-08 - 04:53
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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 Fri May 08, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2787299300,29cyclictest8441-21awk21:55:003
27871993022,7cyclictest28-21ksoftirqd/222:30:012
2787299290,28cyclictest16963-21apt-get19:55:133
2787299290,28cyclictest0-21swapper/300:10:123
27871992927,1cyclictest28-21ksoftirqd/223:05:022
27871992911,17cyclictest151rcu_preempt19:29:072
27870992927,1cyclictest0-21swapper/123:55:011
2787099290,1cyclictest0-21swapper/119:55:011
2786999290,1cyclictest0-21swapper/023:50:020
27872992828,0cyclictest0-21swapper/300:25:123
2787299280,27cyclictest0-21swapper/323:50:103
2787299280,27cyclictest0-21swapper/322:35:133
27871992827,1cyclictest621-21dbus-daemon19:15:012
27871992826,1cyclictest1159-21cron21:40:012
2787199280,28cyclictest0-21swapper/200:30:112
2787199280,28cyclictest0-21swapper/200:15:122
2787199280,27cyclictest26874-21apt-get21:25:112
2787199280,27cyclictest26874-21apt-get21:25:112
2787199280,27cyclictest0-21swapper/223:50:102
2787199280,0cyclictest0-21swapper/223:55:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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