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2026-03-14 - 10:35
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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 rackeslot3.osadl.org (updated Sat Mar 14, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1540387996461,2cyclictest1188-21cron22:10:001
154038799640,62cyclictest1575553-21apt-config21:00:001
1540387996339,23cyclictest2641011-1kworker/1:2H00:00:001
1540387996339,23cyclictest2641011-1kworker/1:2H00:00:001
1540387996158,2cyclictest0-21swapper/120:00:061
1540387996157,2cyclictest0-21swapper/100:24:261
1540387996058,1cyclictest0-21swapper/122:43:581
1540387995956,2cyclictest0-21swapper/123:45:261
1540387995943,15cyclictest1606512-21kworker/1:021:55:121
1540387995942,16cyclictest1625867-21kworker/1:322:25:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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