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2026-04-08 - 20:52
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackfslot7.osadl.org (updated Wed Apr 08, 2026 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
80992999930,91cyclictest0-21swapper/008:20:120
809934998650,18cyclictest691ktimers/511:05:145
80993099750,56cyclictest917647-21kworker/u32:0+events_unbound11:49:331
80993099750,56cyclictest917647-21kworker/u32:0+events_unbound11:49:331
809930997336,18cyclictest331ktimers/111:34:191
809930997314,39cyclictest0-21swapper/108:05:151
80993099730,34cyclictest0-21swapper/109:14:261
809930997214,39cyclictest34-21ksoftirqd/109:54:191
809930997113,39cyclictest807285-21kworker/u32:2+events_unbound08:11:101
809930996850,18cyclictest0-21swapper/108:43:471
809930996626,39cyclictest0-21swapper/108:24:001
809930996425,39cyclictest0-21swapper/108:59:281
809930996424,39cyclictest0-21swapper/111:13:481
809930996344,0cyclictest0-21swapper/111:35:161
80993499623,19cyclictest0-21swapper/508:05:145
809930996122,39cyclictest0-21swapper/111:09:151
809930996022,19cyclictest0-21swapper/108:52:251
809930995858,0cyclictest0-21swapper/110:46:341
809930995638,18cyclictest873-21mta-sts-daemon07:47:271
809930995637,19cyclictest85750irq/36-eno1-TxRx-209:55:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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