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2026-01-02 - 11:19
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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 rackeslot3.osadl.org (updated Fri Jan 02, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3911431995944,14cyclictest4004473-21kworker/1:200:20:141
3911431995942,16cyclictest3950521-21kworker/1:221:10:171
3911431995937,14cyclictest3991857-21kworker/1:123:25:181
3911431995855,2cyclictest0-21swapper/121:51:141
3911431995843,14cyclictest4004473-21kworker/1:200:11:481
3911431995843,14cyclictest3988751-21kworker/1:023:17:101
3911431995843,14cyclictest3986962-21kworker/1:123:07:461
3911431995843,14cyclictest3952971-21kworker/1:121:29:531
3911431995843,14cyclictest3950521-21kworker/1:221:15:181
3911431995843,14cyclictest3932398-21kworker/1:220:19:521
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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