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2026-06-04 - 17:52
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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 rackeslot2.osadl.org (updated Thu Jun 04, 2026 12:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35714692340,4sleep13571470-21cut09:39:411
34366942310,2sleep20-21swapper/207:55:022
3377571992513,8cyclictest3698988-21/usr/sbin/munin11:04:420
3377571992418,5cyclictest3827634-1atopacctd12:35:030
3377571992418,5cyclictest3518634-21/usr/sbin/munin09:00:000
3377572992320,2cyclictest3841841-21latency_hist12:35:021
3377571992317,5cyclictest3810869-21apt-key12:15:010
3377571992317,5cyclictest3697189-21cron11:00:000
3377571992317,5cyclictest3674643-21apt10:45:000
3377571992317,5cyclictest1-21systemd11:15:000
3377571992314,8cyclictest0-21swapper/009:35:010
337757199231,19cyclictest3833793-21munin-run12:30:000
3377571992311,8cyclictest3820965-21head12:24:400
337757199230,12cyclictest0-21swapper/008:24:370
337757199230,12cyclictest0-21swapper/008:24:370
337757199228,9cyclictest0-21swapper/009:54:390
3377571992217,4cyclictest3531360-21systemd-run09:10:000
337757199221,19cyclictest2840498-21systemd-journal08:00:000
337757199221,16cyclictest0-21swapper/011:05:250
3377572992118,2cyclictest3499917-21grep08:45:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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