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2026-04-28 - 11:08
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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 Tue Apr 28, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8429992335264,56sleep10-21swapper/119:08:191
8414042266223,28sleep00-21swapper/019:05:080
84336999633,10cyclictest1040399-21apt-get00:25:150
84336999612,7cyclictest979746-21apt-get23:05:140
179699600,4rtkit-daemon1795-21rtkit-daemon21:20:081
179699590,4rtkit-daemon1795-21rtkit-daemon20:53:591
84336999583,9cyclictest1032814-21apt-get00:15:160
179699580,3rtkit-daemon1795-21rtkit-daemon22:28:001
179699570,4rtkit-daemon1795-21rtkit-daemon23:01:520
179699570,4rtkit-daemon1795-21rtkit-daemon22:53:450
84336999562,7cyclictest987173-21apt-get23:15:150
84336999542,6cyclictest914950-21apt-get21:40:140
84336999531,12cyclictest1006700-21diskstats23:40:150
84336999521,14cyclictest941591-21apt-get22:15:130
84336999521,12cyclictest907477-21apt-get21:30:130
84336999512,8cyclictest1013814-21apt-get23:50:130
179699480,3rtkit-daemon1795-21rtkit-daemon21:09:501
10392822460,2sleep00-21swapper/000:23:150
179699450,2rtkit-daemon1795-21rtkit-daemon21:29:520
84336999443,9cyclictest881565-21apt-get20:45:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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