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2025-11-28 - 07:31
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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 10 highest latencies:
System rackeslot6.osadl.org (updated Fri Nov 28, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4040559910893,11cyclictest271-21systemd-journal00:00:000
404059999486,6cyclictest451976-21apt-get21:40:001
404055999268,21cyclictest497592-21/usr/sbin/munin00:00:260
404059999181,7cyclictest492294-21latency_hist23:45:021
404055998982,5cyclictest437669-21kworker/u8:3+events_unbound21:00:010
404059998872,14cyclictest468388-21kworker/u8:3+flush-179:023:20:261
404055998572,10cyclictest271-21systemd-journal20:20:000
404055998372,8cyclictest416941-21latency_hist19:50:000
404059998276,4cyclictest421759-21kworker/u8:2+flush-179:020:40:251
404060997945,32cyclictest0-21swapper/200:27:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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