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2026-04-26 - 14:49
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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
Characteristics of the 20 highest latencies:
System rackdslot2.osadl.org (updated Sun Apr 26, 2026 00:45:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139591233171,51phc2sys0-21swapper/319:06:203
219182228164,23sleep10-21swapper/119:08:181
218092220171,37sleep20-21swapper/219:06:592
217082202169,22sleep00-21swapper/019:05:400
139291830,2ptp4l391rcuc/322:00:293
139291820,2ptp4l391rcuc/321:00:153
2254499650,63cyclictest0-21swapper/123:05:451
96592570,2sleep10-21swapper/120:55:251
22546995734,20cyclictest41-21ksoftirqd/321:15:003
2254699560,2cyclictest3459-21/usr/sbin/munin20:45:263
2254699555,25cyclictest32298-21df_abs00:00:153
240132540,3sleep20-21swapper/222:35:152
2254699509,22cyclictest13257-21df_abs23:20:153
44282490,1sleep00-21swapper/000:10:000
139291480,1ptp4l391rcuc/323:25:463
22545994437,4cyclictest27068-21cron19:20:002
22546994314,28cyclictest32677-21kworker/3:219:31:253
139291430,0ptp4l401ktimersoftd/322:09:443
41298410,3rtkit-daemon411-21rtkit-daemon22:25:190
139291410,0ptp4l401ktimersoftd/321:58:053
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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