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2026-08-20 - 04:09
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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 20 highest latencies:
System rackeslot3.osadl.org (updated Thu Aug 20, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2946963997542,32cyclictest2987131-21kworker/1:321:20:161
2946963997339,33cyclictest3024260-21kworker/1:022:00:141
2946963996845,22cyclictest2964913-21kworker/1:320:15:001
2946963996638,27cyclictest3052348-21kworker/1:022:45:011
2946963996562,2cyclictest3028546-21sshd21:55:441
294696399651,63cyclictest0-21swapper/100:21:021
2946963996461,2cyclictest0-21swapper/121:43:081
2946963996444,18cyclictest2965559-1kworker/1:2H23:45:011
2946963996439,23cyclictest2965559-1kworker/1:2H20:15:141
2946963996159,1cyclictest0-21swapper/121:07:071
2946963996039,19cyclictest3127692-21kworker/1:023:45:131
2946970995944,13cyclictest3685223-1kworker/2:2H21:50:062
2946963995942,16cyclictest3003789-21kworker/1:021:30:231
2946963995942,15cyclictest3029324-21kworker/1:122:15:131
2946963995935,23cyclictest3057701-21kworker/1:222:35:151
2946970995854,3cyclictest3685223-1kworker/2:2H23:36:422
2946963995843,14cyclictest2973120-21kworker/1:221:00:141
2946963995842,15cyclictest3152107-21kworker/1:300:15:061
2946963995842,15cyclictest3136262-21kworker/1:100:04:081
2946963995842,15cyclictest3136262-21kworker/1:100:04:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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