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2026-04-07 - 10:25
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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 10 highest latencies:
System rackcslot8.osadl.org (updated Tue Apr 07, 2026 00:49:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
150162304296,6sleep100-21swapper/1019:06:412
165149922427,134cyclictest0-21swapper/1822:14:3810
165149922427,134cyclictest0-21swapper/1822:14:3810
3273911800,172ptp4l0-21swapper/119:05:191
165149918010,142cyclictest0-21swapper/1821:19:2510
165419917126,97cyclictest0-21swapper/2521:45:5518
165419917126,144cyclictest0-21swapper/2521:12:1418
165179917052,117cyclictest131-21ksoftirqd/1900:20:1511
165179916717,97cyclictest0-21swapper/1921:22:4711
165419916427,84cyclictest0-21swapper/2500:15:2418
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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