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2026-04-20 - 13:48
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack0slot5.osadl.org (updated Mon Apr 20, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28985699660658,2cyclictest318761-21kworker/3:1+i915-unordered19:55:599
2898809955549,505cyclictest0-21swapper/920:36:5915
2898719952716,28cyclictest88-21ksoftirqd/721:24:5913
289906994980,467cyclictest0-21swapper/1522:10:597
2899069949133,457cyclictest0-21swapper/1522:04:597
289903994879,476cyclictest0-21swapper/1422:35:596
289903994871,29cyclictest0-21swapper/1422:17:596
289890994858,59cyclictest0-21swapper/1120:39:203
2899039948023,456cyclictest0-21swapper/1423:46:596
2899039947940,438cyclictest0-21swapper/1400:10:596
28990699475473,1cyclictest387283-21kworker/15:0+i915-unordered21:24:597
2898619947424,29cyclictest0-21swapper/420:49:4410
2899039946916,453cyclictest0-21swapper/1421:39:596
2898809946419,29cyclictest0-21swapper/920:33:2115
28985699463463,0cyclictest0-21swapper/321:39:599
28989499462431,31cyclictest0-21swapper/1221:12:594
289861994613,59cyclictest0-21swapper/423:38:4410
289845994574,29cyclictest0-21swapper/019:39:210
289845994574,29cyclictest0-21swapper/019:39:210
28989899452452,0cyclictest0-21swapper/1300:20:595
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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