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2026-07-21 - 14:27
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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
Characteristics of the 20 highest latencies:
System rackcslot6.osadl.org (updated Tue Jul 21, 2026 00:46:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
189391999381379,1cyclictest2186858-21kworker/6:100:36:026
189391999381378,2cyclictest1966894-21kworker/6:022:22:026
189391999381378,2cyclictest1966894-21kworker/6:022:22:026
189391999381377,2cyclictest1966894-21kworker/6:021:32:026
189387799381379,1cyclictest2148341-21kworker/0:120:49:020
1893877993811,1cyclictest0-21swapper/020:04:020
1893877993810,380cyclictest0-21swapper/019:58:010
189391999379378,1cyclictest2186858-21kworker/6:100:24:026
189391999379378,1cyclictest1966894-21kworker/6:021:58:026
189391999379376,2cyclictest1966894-21kworker/6:000:05:016
1893877993790,1cyclictest0-21swapper/020:52:010
1893877993790,1cyclictest0-21swapper/020:16:020
189391999378376,1cyclictest2184870-21kworker/6:119:12:026
189391999378376,1cyclictest1966894-21kworker/6:022:58:026
189391999378376,1cyclictest1966894-21kworker/6:021:50:026
189391999378376,1cyclictest1915749-21kworker/6:219:55:026
189391999377376,1cyclictest1966894-21kworker/6:021:21:026
189391999377376,1cyclictest1933814-21kworker/6:321:12:026
189391999376375,1cyclictest2186858-21kworker/6:100:31:026
189391999376375,1cyclictest2186858-21kworker/6:100:17:026
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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