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2025-12-04 - 20:51
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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 Dec 04, 2025 12:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
130721130,5chrt606-21/usr/sbin/munin12:15:291
205629911015,26cyclictest0-21swapper/109:50:251
205629911011,26cyclictest0-21swapper/109:20:111
205629910910,77cyclictest0-21swapper/109:40:131
205599910980,19cyclictest14-21ksoftirqd/011:05:140
20562991089,23cyclictest0-21swapper/109:55:241
205629910812,21cyclictest0-21swapper/111:10:131
205629910811,24cyclictest0-21swapper/110:30:121
20562991079,23cyclictest0-21swapper/108:35:121
20562991078,25cyclictest0-21swapper/110:10:121
205629910714,27cyclictest0-21swapper/109:00:231
205629910711,25cyclictest0-21swapper/112:30:141
205629910711,24cyclictest0-21swapper/107:20:141
205629910711,24cyclictest0-21swapper/107:20:141
205599910776,21cyclictest14-21ksoftirqd/008:45:230
20562991069,23cyclictest0-21swapper/112:35:121
205629910611,24cyclictest0-21swapper/107:15:141
205629910611,23cyclictest0-21swapper/111:25:131
205599910679,17cyclictest14-21ksoftirqd/007:55:250
205599910677,19cyclictest14-21ksoftirqd/009:45:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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