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2026-05-15 - 15:48
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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 Fri May 15, 2026 12:46:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
290620699380378,1cyclictest2988242-21kworker/3:009:57:023
290620699378377,1cyclictest3030354-21kworker/3:210:39:023
290620699378376,1cyclictest3039378-21kworker/3:112:25:033
290620699377376,1cyclictest1922145-21kworker/3:007:37:023
290620699377375,1cyclictest3030354-21kworker/3:210:41:023
290620699376375,1cyclictest2988242-21kworker/3:009:43:013
290620699376375,1cyclictest1922145-21kworker/3:008:23:013
290620699376374,1cyclictest3039378-21kworker/3:110:59:033
290620699376374,1cyclictest2988242-21kworker/3:009:51:013
290620699376374,1cyclictest1922145-21kworker/3:007:47:023
290620699375374,1cyclictest2988242-21kworker/3:010:09:023
290620699375374,1cyclictest0-21swapper/309:37:023
290620699373372,1cyclictest0-21swapper/311:51:023
290620699373371,1cyclictest0-21swapper/311:39:023
290620699373371,1cyclictest0-21swapper/308:09:013
290620699373371,1cyclictest0-21swapper/307:53:023
290620699372371,1cyclictest0-21swapper/312:33:023
290620699372371,1cyclictest0-21swapper/311:57:023
290620699372371,1cyclictest0-21swapper/308:31:023
290620699372370,1cyclictest0-21swapper/311:03:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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