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2026-04-05 - 01:25
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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 10 highest latencies:
System rackeslot6.osadl.org (updated Sat Apr 04, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
149674399112101,9cyclictest1537502-21latency_hist09:15:011
1496742999880,16cyclictest1542613-21apt-get09:30:010
1496742999781,13cyclictest266-21systemd-journal12:10:000
1496743999384,7cyclictest1503007-21kworker/u8:0+events_unbound07:35:021
1496743998979,7cyclictest266-21systemd-journal08:40:001
1496743998879,6cyclictest1518184-21kworker/u8:3+events_unbound08:45:201
1496743998773,8cyclictest1515214-21kworker/u8:1+flush-179:008:05:261
1496743998678,7cyclictest1540942-21kworker/u8:0+events_unbound09:40:231
1496743998573,5cyclictest1530792-21kworker/u8:1+events_unbound08:55:231
1496743998480,3cyclictest1549269-21kworker/u8:1+events_unbound10:45:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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