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2026-05-13 - 15:15
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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 Wed May 13, 2026 12:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17739911368,32cyclictest26-21ksoftirqd/108:30:121
17739911067,29cyclictest26-21ksoftirqd/110:55:111
17709910875,22cyclictest14-21ksoftirqd/008:35:130
17739910658,34cyclictest26-21ksoftirqd/110:40:111
17739910628,25cyclictest0-21swapper/110:00:151
17739910561,31cyclictest26-21ksoftirqd/109:15:151
17739910354,36cyclictest26-21ksoftirqd/109:45:141
17739910351,39cyclictest26-21ksoftirqd/108:05:241
17739910247,37cyclictest26-21ksoftirqd/109:30:131
1773999916,64cyclictest0-21swapper/108:40:231
1773999848,32cyclictest26-21ksoftirqd/109:10:141
1773999813,64cyclictest0-21swapper/108:25:221
177099989,77cyclictest18984-21apt-get12:30:120
1773999612,64cyclictest0-21swapper/109:00:121
1773999546,30cyclictest26-21ksoftirqd/109:50:111
1773999542,33cyclictest26-21ksoftirqd/112:10:141
1773999513,64cyclictest0-21swapper/111:25:231
1773999512,63cyclictest0-21swapper/110:05:111
1773999511,24cyclictest0-21swapper/108:20:141
1773999412,59cyclictest0-21swapper/110:25:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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