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2026-03-27 - 00:12
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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 Thu Mar 26, 2026 12:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
112119911456,38cyclictest0-21swapper/008:45:100
112119910864,26cyclictest14-21ksoftirqd/011:55:110
1121199996,19cyclictest0-21swapper/008:40:110
11216999870,17cyclictest26-21ksoftirqd/107:20:111
1121199987,72cyclictest0-21swapper/009:30:260
1121199936,69cyclictest0-21swapper/011:15:120
11216999166,18cyclictest26-21ksoftirqd/110:05:121
11216999144,37cyclictest26-21ksoftirqd/108:00:131
1107429119,28sleep00-21swapper/007:09:580
11216998861,14cyclictest26-21ksoftirqd/108:50:131
1121699867,68cyclictest18361-21apt-get09:00:131
11216998657,19cyclictest26-21ksoftirqd/111:30:261
11216998534,43cyclictest0-21swapper/109:35:111
11216998512,62cyclictest0-21swapper/112:05:131
1121699848,64cyclictest28347-21apt-get12:30:141
1121699848,61cyclictest24864-21apt-get12:20:111
1121699847,63cyclictest23687-21apt-get10:45:141
11216998432,46cyclictest0-21swapper/110:30:131
11216998415,56cyclictest0-21swapper/107:55:121
11216998314,54cyclictest0-21swapper/110:00:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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