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2025-11-12 - 02:04
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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 rackcslot6.osadl.org (updated Tue Nov 11, 2025 12:46:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
172142221230,0sleep40-21swapper/407:30:164
1706896998817,41cyclictest0-21swapper/012:03:120
1706914998718,35cyclictest0-21swapper/211:13:112
170535328541,13sleep20-21swapper/207:05:222
18639162830,2sleep656-21ksoftirqd/611:20:146
17909382830,0sleep40-21swapper/409:20:214
1706896998316,36cyclictest0-21swapper/007:28:120
1706935998216,34cyclictest0-21swapper/512:13:115
1706935998215,37cyclictest0-21swapper/512:38:125
1706935998215,37cyclictest0-21swapper/512:38:125
18206902790,0sleep00-21swapper/010:10:150
1706935997934,34cyclictest0-21swapper/507:38:125
170666127645,12sleep10-21swapper/107:09:151
18484622740,2sleep763-21ksoftirqd/710:55:167
170643527444,13sleep70-21swapper/707:05:597
18748942730,1sleep763-21ksoftirqd/711:35:207
170691499734,38cyclictest0-21swapper/209:53:122
18019432720,0sleep228-21ksoftirqd/209:40:202
1706921997217,37cyclictest0-21swapper/311:48:123
170691499721,37cyclictest0-21swapper/208:23:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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