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2025-09-17 - 10:56
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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 Wed Sep 17, 2025 00:46:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18495899382380,2cyclictest350654-21kworker/2:123:17:032
18495899382380,1cyclictest350654-21kworker/2:100:30:022
18495899381380,1cyclictest350654-21kworker/2:122:38:022
184958993810,380cyclictest0-21swapper/223:57:032
184958993810,380cyclictest0-21swapper/222:50:032
184958993810,380cyclictest0-21swapper/221:10:022
18495899380379,1cyclictest350654-21kworker/2:123:07:022
18495899380379,1cyclictest278300-21kworker/2:221:59:022
18495899380379,1cyclictest278300-21kworker/2:221:40:012
18495899380379,1cyclictest139706-21kworker/2:119:33:032
18495899380378,1cyclictest278300-21kworker/2:222:02:012
184958993800,1cyclictest0-21swapper/223:42:012
184958993800,1cyclictest0-21swapper/221:39:022
184958993800,1cyclictest0-21swapper/219:40:032
184958993800,1cyclictest0-21swapper/200:25:022
18495899379377,1cyclictest139706-21kworker/2:119:20:022
18495899378377,1cyclictest0-21swapper/223:11:032
18499799377376,1cyclictest0-21swapper/719:46:027
18495899377376,1cyclictest139706-21kworker/2:119:16:022
18495899377376,1cyclictest139706-21kworker/2:119:16:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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