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2026-05-01 - 01:21
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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 rackeslot3.osadl.org (updated Thu Apr 30, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3900212997345,26cyclictest3990098-21lspci10:13:581
3900212997142,27cyclictest4071842-21kworker/1:011:55:131
3900212997042,26cyclictest4061342-21kworker/1:212:00:131
3900212996640,16cyclictest3979894-21kworker/1:010:05:291
3900212996638,16cyclictest3943494-21kworker/1:109:30:161
3900212996542,21cyclictest1261546-1kworker/1:1H11:20:001
3900212996461,2cyclictest0-21swapper/110:25:501
3900212996360,2cyclictest0-21swapper/107:52:451
3900212996343,20cyclictest3936666-21kworker/1:009:12:521
3900212996342,14cyclictest3919122-21kworker/1:108:10:121
3900212996340,14cyclictest1261546-1kworker/1:1H07:55:131
3900212996338,16cyclictest1261546-1kworker/1:1H12:21:061
3900212996335,18cyclictest3906743-21kworker/1:107:30:141
3900212996260,1cyclictest0-21swapper/112:28:211
390021299620,61cyclictest0-21swapper/111:48:161
390021299620,61cyclictest0-21swapper/109:55:051
3900212996158,2cyclictest0-21swapper/111:35:471
3900212996158,2cyclictest0-21swapper/110:51:251
3900212996158,2cyclictest0-21swapper/108:56:551
3900212996146,14cyclictest3936666-21kworker/1:009:20:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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