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2026-04-26 - 11:57
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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 Sun Apr 26, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
367471099780,76cyclictest3774435-21/usr/sbin/munin22:25:161
3674710997738,29cyclictest3840771-21kworker/1:000:00:171
3674710997441,31cyclictest3755664-21kworker/1:222:05:161
3674710997441,31cyclictest3701645-21kworker/1:120:35:121
3674710997039,29cyclictest1314742-1kworker/1:2H20:14:591
3674734996843,15cyclictest1677842-1kworker/3:0H19:50:153
3674710996646,18cyclictest3840771-21kworker/1:023:50:051
367471099660,2cyclictest0-21swapper/120:27:571
3674710996533,30cyclictest3709371-21kworker/1:221:15:191
3674710996434,29cyclictest3793319-21kworker/1:122:50:011
367471099641,1cyclictest0-21swapper/119:25:031
3674710996361,1cyclictest0-21swapper/121:25:411
3674710996241,19cyclictest3759938-21kworker/1:022:15:131
367471099620,60cyclictest0-21swapper/120:02:151
3674734996145,3cyclictest1677842-1kworker/3:0H22:25:133
3674710996157,2cyclictest0-21swapper/123:14:041
3674710996145,15cyclictest3701645-21kworker/1:120:40:161
367471099610,60cyclictest0-21swapper/123:45:451
3674710996044,15cyclictest3867071-21kworker/1:300:23:391
3674710996042,17cyclictest3704748-21kworker/1:220:45:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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