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2025-12-04 - 23:30
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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 Thu Dec 04, 2025 12:46:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36812069911213,79cyclictest3766871-21fschecks_count09:40:155
3681206999759,19cyclictest691ktimers/507:37:575
368120699856,60cyclictest3770409-21ntpq09:45:215
368120699780,59cyclictest3790153-21ntpq10:20:235
3681207997517,19cyclictest0-21swapper/609:05:286
3681206997537,19cyclictest691ktimers/510:36:535
3681206997436,19cyclictest38280272chrt11:27:535
3681207997335,19cyclictest781ktimers/607:25:176
3681206997233,38cyclictest1089-21snmpd10:15:235
3681206996930,39cyclictest0-21swapper/511:07:245
3681206996829,39cyclictest0-21swapper/509:33:525
3681206996828,39cyclictest0-21swapper/509:24:135
3681206996729,38cyclictest0-21swapper/509:50:175
3681206996627,39cyclictest0-21swapper/512:28:415
3681206996627,39cyclictest0-21swapper/508:29:055
3681206996527,38cyclictest0-21swapper/512:01:035
3681206996526,39cyclictest0-21swapper/512:12:095
3681206996426,19cyclictest3750474-21ntpq09:10:215
368120899634,20cyclictest0-21swapper/709:00:167
368120699636,38cyclictest3819288-21dpkg-deb11:13:315
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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