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2026-05-13 - 08:51
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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 Wed May 13, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31901129910796,8cyclictest3297013-21latency_hist00:40:011
31901129910392,8cyclictest3195081-21latency_hist19:25:011
31901129910195,4cyclictest3282334-21kworker/u8:0+flush-179:000:00:281
31901129910192,7cyclictest3290632-21latency_hist00:20:011
31901129910083,13cyclictest3283977-40mandb00:00:011
3190109999884,11cyclictest3253200-21latency_hist22:25:010
3190112999788,6cyclictest3214155-21kworker/u8:0+events_unbound20:25:241
3190109999585,7cyclictest3236769-21apt-get21:35:030
3190112999384,6cyclictest3238610-21latency_hist21:40:011
3190112999278,10cyclictest3251340-21latency_hist22:20:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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