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2026-06-18 - 23:55
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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 rackfslot7.osadl.org (updated Thu Jun 18, 2026 12:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
397651299960,96cyclictest0-21swapper/512:05:165
3976511996710,38cyclictest4064857-21kworker/0:110:07:034
397651199635,39cyclictest3993508-21kworker/u32:3+events_unbound07:54:534
397651299590,38cyclictest0-21swapper/509:05:155
3976510995536,19cyclictest0-21swapper/310:00:163
3976514995430,18cyclictest0-21swapper/710:05:167
3976510995315,19cyclictest0-21swapper/307:45:153
3976504995333,20cyclictest16-21ksoftirqd/011:30:160
3976514995214,19cyclictest0-21swapper/707:50:167
3976512995214,19cyclictest0-21swapper/509:40:165
3976510995252,0cyclictest0-21swapper/312:35:133
3976504995250,2cyclictest0-21swapper/008:12:210
3976508995132,19cyclictest0-21swapper/112:30:151
3976512995012,19cyclictest0-21swapper/512:30:155
3976511995013,18cyclictest4147868-21kworker/5:312:25:134
3976510995012,19cyclictest0-21swapper/309:40:153
3976508995013,18cyclictest0-21swapper/109:10:161
3976508995012,19cyclictest0-21swapper/110:25:171
3976514994829,19cyclictest0-21swapper/707:20:147
3976512994810,19cyclictest0-21swapper/512:00:165
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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