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2026-03-25 - 10:18
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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 Wed Mar 25, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
281629623580,10sleep10-21swapper/119:05:311
28166662319279,26sleep00-21swapper/019:06:450
281711699652,44cyclictest2990066-21appstreamcli00:05:050
281711699642,37cyclictest2869447-21apt-get21:15:290
179699640,4rtkit-daemon1795-21rtkit-daemon00:16:280
281711699612,39cyclictest2887479-21apt-get21:40:130
281711699592,39cyclictest2930290-21apt-get22:40:130
281711699592,39cyclictest2930290-21apt-get22:40:130
281711699570,3cyclictest2854110-21strings20:40:200
281711699570,2cyclictest2832581-21grep19:45:200
179699570,5rtkit-daemon1795-21rtkit-daemon21:25:110
281711699558,35cyclictest2965693-21cat23:30:190
281711699550,7cyclictest3002214-21sh00:24:190
281711699540,3cyclictest0-21swapper/021:49:150
281711699538,28cyclictest2873783-21sed21:20:190
281711699531,28cyclictest2936907-21/usr/sbin/munin22:50:000
281711699530,6cyclictest2901305-21ssh21:59:590
281711699530,3cyclictest2834902-21grep19:50:230
281711699529,27cyclictest2823493-21seq19:20:550
281711699528,26cyclictest2944914-21sed23:00:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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