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2026-09-07 - 14:56
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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 rack3slot6.osadl.org (updated Mon Sep 07, 2026 12:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
605629938,42sleep00-21swapper/007:05:180
7452998133,43cyclictest26-21ksoftirqd/108:27:381
671627432,29sleep10-21swapper/107:05:301
7448997353,15cyclictest0-21swapper/007:10:150
7452996833,29cyclictest26-21ksoftirqd/110:05:341
744899675,53cyclictest12607-21apt-get10:25:120
7448996736,26cyclictest14-21ksoftirqd/007:40:190
7452996623,39cyclictest26-21ksoftirqd/111:40:261
7452996534,17cyclictest26-21ksoftirqd/109:22:041
744899657,17cyclictest0-21swapper/010:10:140
7448996529,9cyclictest14-21ksoftirqd/009:21:180
87112640,8chrt0-21swapper/108:40:331
744899647,16cyclictest0-21swapper/009:35:150
7448996430,29cyclictest14-21ksoftirqd/007:45:280
7452996237,9cyclictest26-21ksoftirqd/112:23:381
7452996234,9cyclictest26-21ksoftirqd/107:34:581
744899627,50cyclictest0-21swapper/011:50:110
744899622,24cyclictest7898-21grep11:40:360
744899616,14cyclictest0-21swapper/009:10:140
744899616,14cyclictest0-21swapper/009:05:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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