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2026-07-18 - 17:04
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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 rackfslot7.osadl.org (updated Sat Jul 18, 2026 12:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2892575991590,158cyclictest0-21swapper/712:25:167
2892571996810,39cyclictest3003495-21cpuspeed_turbos10:30:133
289257199679,19cyclictest0-21swapper/308:09:193
2892571996527,19cyclictest511ktimers/311:40:313
289257199621,59cyclictest2903583-21unin-run07:30:003
289257199613,38cyclictest2964710-21/usr/sbin/munin09:20:133
289257199600,59cyclictest3008132-21taskset10:39:523
2892571995838,19cyclictest2971169-21ntp_states09:30:213
2892571995838,19cyclictest0-21swapper/311:20:003
2892571995816,39cyclictest2934072-21grep08:25:133
2892571995637,19cyclictest2974575-21/usr/sbin/munin09:35:203
2892571995636,19cyclictest511ktimers/307:20:293
289256899560,17cyclictest0-21swapper/010:45:170
2892571995516,39cyclictest871-21mta-sts-daemon07:54:053
2892571995515,19cyclictest2998749-21memory10:20:173
2892571995515,19cyclictest194598rtkit-daemon09:48:473
2892571995514,39cyclictest2962779-21pmu-power09:15:203
289257199550,16cyclictest0-21swapper/311:32:333
2892571995414,39cyclictest0-21swapper/311:47:293
2892571995414,39cyclictest0-21swapper/311:47:283
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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