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2026-08-28 - 00:56
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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 Thu Aug 27, 2026 12:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
343865799158124,22cyclictest3496852-21latency_hist10:10:011
343865799149138,8cyclictest1213033-21systemd-journal07:20:011
343865399140132,5cyclictest3458434-21kworker/u8:4+flush-179:008:50:010
343865399130119,8cyclictest3517795-21latency_hist11:15:010
343865799129118,8cyclictest3485707-21latency_hist09:35:021
343865399120105,12cyclictest3441890-21apt-get07:20:000
343865799119111,5cyclictest3441945-21kworker/u8:0+events_unbound08:00:251
343865799119105,11cyclictest1213033-21systemd-journal12:25:001
343865799119105,11cyclictest1213033-21systemd-journal12:25:001
343865799118107,8cyclictest3455208-21latency_hist08:00:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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