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2026-05-08 - 13:30
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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
Characteristics of the 10 highest latencies:
System rackdslot1.osadl.org (updated Fri May 08, 2026 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2451399702,32cyclictest0-21swapper/321:05:153
196902680,8sleep22451299cyclictest23:35:182
24513996425,4cyclictest41-21ksoftirqd/319:10:213
24513996332,3cyclictest41-21ksoftirqd/300:05:133
134491630,5ptp4l25597-21/usr/sbin/munin19:10:220
134491630,4ptp4l3371-21apt-get00:10:112
24513996233,7cyclictest41-21ksoftirqd/321:42:063
24513996233,7cyclictest41-21ksoftirqd/321:42:063
24513996128,4cyclictest41-21ksoftirqd/300:30:013
134491610,4ptp4l0-21swapper/023:50:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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