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2025-12-19 - 08:56
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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 20 highest latencies:
System rackeslot8.osadl.org (updated Fri Dec 19, 2025 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25790442240,1sleep10-21swapper/123:20:191
2251819992219,1cyclictest0-21swapper/300:00:003
2251819992118,1cyclictest0-21swapper/321:45:003
2251819992117,1cyclictest0-21swapper/320:35:013
2251819992017,1cyclictest0-21swapper/321:30:003
2251819992017,1cyclictest0-21swapper/300:30:003
2251819992016,1cyclictest0-21swapper/300:10:003
225181999201,13cyclictest2293186-21taskset19:40:013
2251819991916,1cyclictest0-21swapper/323:35:163
2251819991916,1cyclictest0-21swapper/323:35:163
2251819991916,1cyclictest0-21swapper/323:10:003
2251819991916,1cyclictest0-21swapper/321:20:173
2251819991916,1cyclictest0-21swapper/321:20:173
225181999191,14cyclictest2467350-21turbostat21:55:003
225181999191,14cyclictest2279787-21turbostat19:30:003
2251819991812,4cyclictest2519040-21turbostat22:39:553
225181999181,13cyclictest2486583-21taskset22:10:003
225181999181,13cyclictest2421054-21taskset21:15:223
225181999181,13cyclictest2311323-21taskset19:50:233
225181999181,13cyclictest2268241-21taskset19:20:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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