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2026-04-19 - 17:12
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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 Sun Apr 19, 2026 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40115152930,2sleep30-21swapper/312:20:483
37376192520,2sleep30-21swapper/309:15:573
38557502280,2sleep13855504-21ssh10:35:521
3571263992623,1cyclictest601rcuop/307:40:001
3571262992421,2cyclictest3859865-21systemctl10:40:000
3571262992414,6cyclictest3844802-21munin-run10:30:000
3571262992412,7cyclictest0-21swapper/011:40:430
3571262992320,2cyclictest3814897-21/usr/sbin/munin10:10:020
3571262992316,6cyclictest1296-21polkitd12:05:000
3571262992314,8cyclictest0-21swapper/007:45:000
3571262992312,6cyclictest0-21swapper/011:10:020
37253142220,0sleep13725318-21head09:10:461
3571263992219,2cyclictest1296-21polkitd12:10:001
357126299220,17cyclictest3800715-21idleruntime10:00:460
3571264992119,1cyclictest0-21swapper/207:15:022
3571263992118,2cyclictest3739165-21apt-key09:20:001
357126299219,7cyclictest0-21swapper/009:20:430
3571262992118,2cyclictest4040158-21apt12:40:000
3571262992118,2cyclictest0-21swapper/009:45:580
3571262992111,5cyclictest0-21swapper/012:35:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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