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2026-05-07 - 22:37
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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 Thu May 07, 2026 12:46:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
858899382380,1cyclictest33486-21kworker/0:008:44:020
858899381379,1cyclictest33486-21kworker/0:011:03:020
858899381379,1cyclictest33486-21kworker/0:009:16:020
858899381379,1cyclictest33486-21kworker/0:009:06:020
858899381379,1cyclictest0-21swapper/010:33:020
8588993810,381cyclictest0-21swapper/012:03:020
8588993810,1cyclictest0-21swapper/008:11:020
858899380378,1cyclictest33486-21kworker/0:010:52:020
858899380378,1cyclictest33486-21kworker/0:009:58:020
858899380378,1cyclictest33486-21kworker/0:007:53:020
858899380378,1cyclictest180695-21kworker/0:211:57:030
8588993800,380cyclictest0-21swapper/009:54:020
8588993800,379cyclictest0-21swapper/011:39:020
8588993800,1cyclictest0-21swapper/010:39:020
8588993800,1cyclictest0-21swapper/008:35:020
859699379378,1cyclictest54554-21kworker/1:208:47:021
859699379377,1cyclictest54554-21kworker/1:209:31:031
859699379377,1cyclictest0-21swapper/107:13:031
858899379378,1cyclictest1483659-21kworker/0:107:49:020
858899379378,1cyclictest1483659-21kworker/0:107:19:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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