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2026-05-17 - 05:34
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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 Sun May 17, 2026 00:46:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
336627399381379,1cyclictest3366127-21kworker/3:121:13:023
336628799380378,2cyclictest3680847-21kworker/5:022:32:015
336628799380378,1cyclictest0-21swapper/522:11:015
336627399380379,1cyclictest3366127-21kworker/3:123:40:013
336627399380378,2cyclictest3366127-21kworker/3:123:10:013
336627399380376,3cyclictest3366127-21kworker/3:122:50:013
336625399380379,1cyclictest3415213-21kworker/1:221:21:021
336625399380378,1cyclictest0-21swapper/122:32:011
3366253993800,379cyclictest0-21swapper/121:45:021
336628799379378,1cyclictest3680847-21kworker/5:021:10:025
336628799379377,1cyclictest3680847-21kworker/5:021:59:025
336628799379377,1cyclictest3560247-21kworker/5:323:49:015
3366287993790,378cyclictest0-21swapper/521:45:015
336627399379378,1cyclictest3366127-21kworker/3:123:18:013
336627399379378,1cyclictest3366127-21kworker/3:122:59:013
336627399379378,1cyclictest3366127-21kworker/3:100:38:023
336627399379378,1cyclictest3366127-21kworker/3:100:25:013
336625399379378,1cyclictest3525380-21kworker/1:023:56:011
336627399378377,1cyclictest0-21swapper/321:54:013
336627399378376,2cyclictest0-21swapper/319:35:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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