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2026-03-27 - 17:16
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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 Mar 27, 2026 12:49:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273913060,299ptp4l0-21swapper/107:06:291
235539918923,115cyclictest0-21swapper/1009:30:252
235309917859,118cyclictest46-21ksoftirqd/511:11:2027
235839916622,127cyclictest0-21swapper/1507:15:197
235839915222,76cyclictest0-21swapper/1511:00:167
23615991460,85cyclictest0-21swapper/2010:50:0213
23506991440,89cyclictest0-21swapper/010:28:480
23542991430,84cyclictest0-21swapper/808:15:2330
23542991430,84cyclictest0-21swapper/808:15:2230
235959914252,59cyclictest0-21swapper/1709:16:389
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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