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2026-04-13 - 01:09
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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 Sun Apr 12, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2265259955534,520cyclictest0-21swapper/123:18:141
2265479951215,495cyclictest0-21swapper/719:28:1413
22655499489487,2cyclictest421777-21kworker/9:2+i915-unordered23:18:1415
22653299487485,2cyclictest388581-21kworker/3:1+i915-unordered22:43:149
22653299487485,2cyclictest388581-21kworker/3:1+i915-unordered22:43:149
22652599487486,1cyclictest396603-21kworker/1:2+i915-unordered22:55:141
22652599485485,0cyclictest0-21swapper/122:10:141
22655999478478,0cyclictest0-21swapper/1000:07:142
2265259947329,29cyclictest0-21swapper/122:00:141
2265669947123,30cyclictest0-21swapper/1121:13:353
2265259947123,447cyclictest34-21ksoftirqd/119:52:141
2265259947123,447cyclictest34-21ksoftirqd/119:52:141
2265829946921,30cyclictest0-21swapper/1523:16:567
2265749946821,29cyclictest0-21swapper/1321:07:575
2265669946822,28cyclictest124-21ksoftirqd/1120:40:143
2265479946823,29cyclictest0-21swapper/700:29:0813
2265669946716,59cyclictest124-21ksoftirqd/1119:40:143
2265669946716,59cyclictest124-21ksoftirqd/1119:40:143
2265829946412,29cyclictest0-21swapper/1521:41:567
2265669946317,28cyclictest0-21swapper/1100:08:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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