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2026-05-27 - 15:33
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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 27, 2026 12:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
80909912190,19cyclictest0-21swapper/009:30:120
80909911384,18cyclictest14-21ksoftirqd/012:15:120
80909911176,21cyclictest14-21ksoftirqd/012:10:130
8095991109,40cyclictest19704-31find07:40:111
80909911075,21cyclictest14-21ksoftirqd/008:05:120
80909910929,66cyclictest0-21swapper/012:35:130
80909910777,18cyclictest14-21ksoftirqd/007:35:120
80909910773,21cyclictest14-21ksoftirqd/010:50:110
80909910713,80cyclictest0-21swapper/010:10:100
80909910712,80cyclictest0-21swapper/008:25:160
80909910368,22cyclictest14-21ksoftirqd/007:25:240
80909910367,23cyclictest14-21ksoftirqd/011:40:140
80909910212,77cyclictest0-21swapper/009:35:100
80909910211,77cyclictest0-21swapper/009:45:110
80909910157,30cyclictest14-21ksoftirqd/008:20:120
80909910111,28cyclictest0-21swapper/010:20:130
80909910111,28cyclictest0-21swapper/010:20:130
8095991008,34cyclictest9226-21apt-get08:40:161
80909910062,25cyclictest14-21ksoftirqd/007:10:140
80909910012,28cyclictest0-21swapper/008:10:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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