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2025-12-08 - 01:42
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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
Characteristics of the 20 highest latencies:
System rackeslot2.osadl.org (updated Sun Dec 07, 2025 12:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
289185021000,2sleep20-21swapper/210:35:102
26663022800,1sleep00-21swapper/008:05:120
31049352610,2sleep30-21swapper/312:35:153
27795762290,2sleep30-21swapper/309:30:153
26938972260,4sleep0241rcuc/008:28:560
2593755992320,1cyclictest0-21swapper/210:22:162
259375399221,6cyclictest2626940-21apt-get07:35:050
2593753992117,3cyclictest0-21swapper/011:15:000
2593753992115,2cyclictest170550irq/121-eno109:55:210
2593753992113,7cyclictest0-21swapper/010:55:010
2593753992110,6cyclictest0-21swapper/010:05:150
302487291200,2phc2sys0-21swapper/309:58:023
2593754992017,2cyclictest2978014-21awk11:25:001
2593754992017,2cyclictest2943026-21systemd-run11:05:011
2593754992017,2cyclictest2847581-21/usr/sbin/munin10:10:131
2593753992017,2cyclictest3030259-21apt-key11:55:000
2593753992011,5cyclictest1652-1atopacctd11:29:550
2593753992010,8cyclictest0-21swapper/012:35:110
302487291191,2phc2sys0-21swapper/308:10:013
2593755991916,1cyclictest0-21swapper/210:35:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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