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2026-05-04 - 09:19
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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 rackcslot4.osadl.org (updated Mon May 04, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38399402258184,59sleep00-21swapper/019:05:500
38402882255183,57sleep10-21swapper/119:09:341
38935162610,4sleep03893514-21seq21:15:170
384047099463,14cyclictest4021997-21apt-get00:05:121
179699450,3rtkit-daemon0-21swapper/021:53:570
39751082440,4sleep00-21swapper/023:02:590
384047099423,12cyclictest4044280-21apt-get00:35:141
3840470994114,9cyclictest3907637-21sh21:33:501
3840470994113,9cyclictest3945829-21sh22:24:331
3840470993935,2cyclictest4032811-21latency_hist00:20:011
384047099392,20cyclictest3953627-21latency_hist22:35:011
384047099392,13cyclictest3980543-21apt-get23:10:121
3840470993914,9cyclictest4043228-21sh00:33:151
3840470993914,9cyclictest4043228-21sh00:33:141
3840470993911,9cyclictest3987550-21sh23:19:431
384046599397,9cyclictest66950irq/132-enp2s021:10:140
179699390,3rtkit-daemon0-21swapper/021:47:550
3840470993812,8cyclictest3937146-21sh22:12:101
384047099379,9cyclictest3917604-21sh21:46:141
384047099372,13cyclictest3927055-21apt-get22:00:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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