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2025-11-28 - 12:38
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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 rackfslot7.osadl.org (updated Fri Nov 28, 2025 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1625426997617,59cyclictest1666585-21ps20:20:234
1625426997617,58cyclictest1743997-21/usr/sbin/munin22:40:164
162542699580,39cyclictest987366-21NetworkManager21:47:304
162542699580,39cyclictest1765172-21collect223:15:204
162542699570,38cyclictest1676324-21kworker/u32:0+flush-8:021:09:214
162542699570,38cyclictest1622841-21kworker/u32:1+events_unbound20:08:024
1625426995638,18cyclictest601ktimers/420:43:484
1625426995638,18cyclictest601ktimers/419:39:274
1625426995618,19cyclictest1704502-21munin-run21:30:014
1625426995618,19cyclictest1634118-21munin-run19:25:024
1625426995417,18cyclictest1710130-21munin-run21:40:024
1625426995233,19cyclictest0-21swapper/423:22:204
1625426995233,19cyclictest0-21swapper/423:22:194
1625426995233,19cyclictest0-21swapper/400:38:014
1625426995233,19cyclictest0-21swapper/400:08:224
1625426995133,18cyclictest0-21swapper/422:50:444
1625426995133,18cyclictest0-21swapper/422:23:044
1625426995132,19cyclictest0-21swapper/423:57:524
1625426995132,19cyclictest0-21swapper/422:02:054
1625423995113,38cyclictest0-21swapper/122:40:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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