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2025-12-22 - 11:37
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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 Mon Dec 22, 2025 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38378272330,1sleep10-21swapper/120:10:171
3758129992820,6cyclictest3933114-21sleep21:25:003
3758129992724,1cyclictest0-21swapper/322:55:013
3758129992219,1cyclictest0-21swapper/319:45:123
375812999221,15cyclictest4067150-21taskset23:10:003
38628872211,11sleep01-21systemd20:30:000
3758129992118,1cyclictest0-21swapper/323:15:143
3758129992017,1cyclictest0-21swapper/323:25:003
3758129991916,1cyclictest0-21swapper/323:55:003
3758129991916,1cyclictest0-21swapper/320:50:203
375812999183,11cyclictest4041583-21turbostat22:49:593
3758129991817,0cyclictest0-21swapper/300:05:003
3758129991816,1cyclictest0-21swapper/323:45:183
3758129991816,1cyclictest0-21swapper/300:20:013
3758129991815,1cyclictest0-21swapper/322:00:123
3758129991815,1cyclictest0-21swapper/320:30:013
3758129991815,1cyclictest0-21swapper/320:16:093
3758129991815,1cyclictest0-21swapper/319:15:203
3758129991815,1cyclictest0-21swapper/300:40:003
3758129991815,1cyclictest0-21swapper/300:25:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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