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2026-07-24 - 01:52
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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 Thu Jul 23, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18085994110,17cyclictest151rcu_preempt08:42:172
18085993214,18cyclictest28-21ksoftirqd/211:30:132
18086993028,1cyclictest4905-21sendmail-msp09:00:013
18085993028,1cyclictest14256-21cron09:19:592
18086992928,1cyclictest16236-21cron11:40:023
18086992926,2cyclictest307-21systemd-journal10:50:003
1808699290,28cyclictest2601-21munin-run08:55:003
18085992928,0cyclictest0-21swapper/208:25:122
18085992927,1cyclictest6670-21munin-run11:20:012
18084992927,1cyclictest4885-21cron09:00:011
1808499290,1cyclictest2760-21apt-get12:20:111
18086992827,1cyclictest0-21swapper/311:10:123
18086992827,0cyclictest21201-21apt-get11:50:123
1808699280,27cyclictest0-21swapper/309:35:123
1808699280,0cyclictest0-21swapper/311:40:133
1808699280,0cyclictest0-21swapper/311:15:123
18085992827,0cyclictest23522-21apt-get11:55:122
1808599280,0cyclictest9369-21apt-get08:00:102
1808599280,0cyclictest0-21swapper/208:45:102
18084992828,0cyclictest0-21swapper/111:40:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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