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2026-04-24 - 12:54
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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 Fri Apr 24, 2026 00:46:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
785319996848,20cyclictest0-21swapper/120:10:161
78532299560,16cyclictest0-21swapper/400:20:194
78532599550,16cyclictest0-21swapper/719:50:167
785323995453,1cyclictest691ktimers/519:45:155
785323995233,19cyclictest0-21swapper/522:30:165
785318995214,19cyclictest0-21swapper/020:35:160
785325995012,19cyclictest0-21swapper/722:35:167
785318995011,39cyclictest0-21swapper/023:15:150
785323994911,19cyclictest0-21swapper/521:05:165
785321994910,39cyclictest0-21swapper/319:35:163
78532299477,39cyclictest0-21swapper/423:40:344
78532299477,39cyclictest0-21swapper/422:09:344
78532299477,39cyclictest0-21swapper/421:50:564
78532299477,39cyclictest0-21swapper/420:27:334
78532299477,39cyclictest0-21swapper/420:27:334
78532299477,39cyclictest0-21swapper/419:31:434
785322994727,19cyclictest1086-21runrttasks21:30:014
785322994726,20cyclictest896088-21kworker/u32:4+flush-8:023:59:554
78532199477,39cyclictest0-21swapper/319:25:153
78531999479,19cyclictest0-21swapper/123:40:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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