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2026-04-21 - 14:02
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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 rackdslot0.osadl.org (updated Tue Apr 21, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14824993321,10cyclictest29847-21kworker/1:121:55:151
14824992818,0cyclictest0-21swapper/122:01:501
14820992216,3cyclictest9-21ksoftirqd/022:28:040
1482999210,20cyclictest843-21systemd-network22:00:462
1482499210,20cyclictest870-21systemd-logind23:18:511
1482499210,18cyclictest0-21swapper/123:59:231
14820992112,5cyclictest0-21swapper/020:45:020
1482099210,7cyclictest870-21systemd-logind20:23:520
14824992017,2cyclictest3976-21H222:10:211
1482099202,3cyclictest0-21swapper/023:34:470
14829991917,1cyclictest0-21swapper/222:15:132
1482999190,2cyclictest4035-21H222:10:212
1482999190,2cyclictest3989-21H222:10:212
1482999190,18cyclictest0-21swapper/219:44:312
1482999190,18cyclictest0-21swapper/219:44:302
1482999190,16cyclictest3981-21H222:10:212
1482499192,11cyclictest28446-21munin-run19:35:011
14824991917,1cyclictest21-21ksoftirqd/100:39:051
14824991915,3cyclictest25492-21nfsd421:20:181
14824991913,5cyclictest426-21systemd-udevd21:36:521
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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