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2026-03-07 - 00:15
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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 10 highest latencies:
System rackfslot7.osadl.org (updated Fri Mar 06, 2026 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
194977199139101,19cyclictest2009240-21ntpq08:55:200
194977199137113,19cyclictest1992770-21ntpq08:25:180
194977199129128,0cyclictest1976539-21find07:55:220
1949771999032,39cyclictest2122934-21systemctl12:25:000
1949771998627,39cyclictest2100199-21awk11:40:200
1949771997234,19cyclictest2080192-21diskstats11:05:140
1949776997152,19cyclictest691ktimers/509:00:175
1949771997133,38cyclictest0-21swapper/008:20:520
1949771997132,39cyclictest0-21swapper/010:56:480
1949771997132,39cyclictest0-21swapper/008:10:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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