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2026-06-11 - 10:40
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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 rackeslot6.osadl.org (updated Thu Jun 11, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
316164799126102,22cyclictest1213033-21systemd-journal20:55:011
316164499116105,8cyclictest3190557-21latency_hist20:40:000
316164799115105,7cyclictest3200107-21latency_hist21:10:001
316164799115100,5cyclictest3254892-21kworker/u8:2+events_unbound00:04:001
316164499115103,9cyclictest1213033-21systemd-journal00:00:010
316164499114104,7cyclictest3163236-21latency_hist19:15:010
31616479911399,11cyclictest3254763-40mandb00:00:011
316164799113103,7cyclictest3188964-21latency_hist20:35:001
316164799113103,6cyclictest3144689-21kworker/u8:1+flush-179:019:35:011
31616479910597,6cyclictest1213033-21systemd-journal22:40:001
31616449910392,8cyclictest3203288-21latency_hist21:20:020
3161647999989,7cyclictest3241990-21latency_hist23:20:011
3161647999985,11cyclictest3179963-21diskstats20:05:151
3161647999985,11cyclictest3179963-21diskstats20:05:151
3161647999981,12cyclictest1213033-21systemd-journal20:25:011
3161644999992,5cyclictest3225292-21kworker/u8:1+flush-179:022:45:000
3161644999973,10cyclictest1213033-21systemd-journal20:14:550
3161644999769,7cyclictest3261407-21latency_hist00:20:020
316164499971,73cyclictest1-21systemd20:55:000
3161644999687,6cyclictest3261939-21kworker/u8:2+flush-179:000:25:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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