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2026-09-24 - 18:54
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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 Thu Sep 24, 2026 12:48:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273912920,284ptp4l0-21swapper/107:08:511
3273912920,284ptp4l0-21swapper/107:08:511
330891238230,6phc2sys0-21swapper/207:09:5112
330891238230,6phc2sys0-21swapper/207:09:5012
264789916456,85cyclictest0-21swapper/511:20:3227
265619915538,113cyclictest0-21swapper/1709:43:269
265619915138,93cyclictest0-21swapper/1709:28:459
26561991500,86cyclictest0-21swapper/1711:02:019
265769914739,107cyclictest125-21ksoftirqd/1809:37:3410
265619914535,108cyclictest0-21swapper/1708:50:009
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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