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2026-05-08 - 16:02
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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 Fri May 08, 2026 12:49:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273912330,225ptp4l0-21swapper/107:05:511
326299917545,129cyclictest0-21swapper/710:14:3629
32648991692,110cyclictest9416-21irqrtprio11:10:1731
281582165155,7sleep80-21swapper/807:05:1530
326299916029,130cyclictest0-21swapper/709:24:2329
326299916029,130cyclictest0-21swapper/709:24:2229
327229915533,82cyclictest0-21swapper/2607:30:2219
326299915524,101cyclictest0-21swapper/710:53:0729
312512153146,6sleep20-21swapper/207:08:5212
299892150141,7sleep140-21swapper/1407:05:206
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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