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2026-05-05 - 14:06
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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 Tue May 05, 2026 12:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
830721260,6chrt8303-21grep08:40:380
6614210721,40sleep00-21swapper/007:07:380
7017999476,13cyclictest0-21swapper/010:30:230
7017998863,12cyclictest14-21ksoftirqd/010:50:130
7017998862,13cyclictest14-21ksoftirqd/009:55:140
7017998660,13cyclictest14-21ksoftirqd/008:15:110
7017998158,13cyclictest14-21ksoftirqd/012:35:110
7017997951,18cyclictest14-21ksoftirqd/007:10:130
7017997652,14cyclictest14-21ksoftirqd/008:45:110
701799747,56cyclictest10892-21apt-get10:35:120
7017997410,22cyclictest0-21swapper/012:30:330
7021997240,21cyclictest26-21ksoftirqd/112:05:121
7017997140,18cyclictest106932sleep008:50:120
661227114,45sleep10-21swapper/107:07:371
217602710,6sleep021763-21sed09:20:260
701799708,55cyclictest0-21swapper/011:40:130
701799707,16cyclictest11124-21apt-get07:20:120
7017997016,26cyclictest19497-21turbostat11:00:000
7017997015,29cyclictest13894-21grep07:25:370
297332700,7sleep0171rcuc/011:25:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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