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2026-03-28 - 05:17
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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 Sat Mar 28, 2026 00:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2508399234,11cyclictest18175-21python323:45:000
2509299220,4cyclictest10875-21tune2fs21:35:142
2509299220,21cyclictest0-21swapper/219:33:182
2508899220,21cyclictest843-21systemd-network21:56:031
25092992117,3cyclictest0-21swapper/219:51:442
25092992117,3cyclictest0-21swapper/219:51:432
2508899215,9cyclictest0-21swapper/119:37:131
2509299193,1cyclictest0-21swapper/200:02:352
2509299193,15cyclictest0-21swapper/222:25:202
2509299192,16cyclictest0-21swapper/223:54:102
25092991917,2cyclictest28-21ksoftirqd/223:15:132
25092991914,3cyclictest8782-21nfsd421:30:182
25088991914,3cyclictest0-21swapper/120:19:291
25083991917,1cyclictest0-21swapper/019:20:000
25083991915,3cyclictest0-21swapper/020:54:520
2508399190,18cyclictest0-21swapper/020:00:170
2509299182,1cyclictest0-21swapper/223:30:142
25092991816,1cyclictest0-21swapper/223:28:242
25092991816,1cyclictest0-21swapper/223:00:522
25092991814,3cyclictest16748-21snapd21:47:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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