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2026-05-17 - 13:31
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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 20 highest latencies:
System rackeslot2.osadl.org (updated Sun May 17, 2026 00:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
217801421090,2sleep30-21swapper/300:35:113
178611821030,2sleep30-21swapper/320:05:163
19319582980,2sleep30-21swapper/321:55:013
20856582300,2sleep0241rcuc/023:35:070
1709225992618,7cyclictest0-21swapper/000:40:030
1709225992516,5cyclictest2054773-21latency_hist23:15:030
2649091241,5phc2sys0-21swapper/322:35:053
170922599246,13cyclictest0-21swapper/022:05:190
1709225992416,7cyclictest1878594-21systemctl21:20:020
1709232992320,1cyclictest0-21swapper/222:00:002
1709232992319,2cyclictest0-21swapper/223:20:002
170922799230,4cyclictest2050157-21kthreadcore23:10:121
1709227992219,2cyclictest1824651-21apt-get20:40:011
1709225992213,5cyclictest1989492-21kthreadcore22:30:130
383433398210,5rtkit-daemon3851704-21mta-sts-daemon19:57:410
1709232992118,1cyclictest0-21swapper/222:50:172
1709232992117,2cyclictest0-21swapper/223:10:022
1709227992118,2cyclictest1-21systemd21:50:011
1709225992118,2cyclictest1290-21dbus-daemon23:50:020
383433398200,5rtkit-daemon3851704-21mta-sts-daemon21:03:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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