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2026-05-24 - 21:57
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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 rackfslot7.osadl.org (updated Sun May 24, 2026 12:46:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1450211997921,39cyclictest1494111-21kworker/3:108:45:073
145021999560,55cyclictest0-21swapper/711:35:157
1450211995638,18cyclictest0-21swapper/308:25:173
145020599560,17cyclictest0-21swapper/009:25:160
1450211995537,18cyclictest0-21swapper/307:21:013
1450205995536,19cyclictest171ktimers/012:20:160
1450216995334,19cyclictest681rcuc/509:15:165
1450211995112,39cyclictest0-21swapper/310:25:163
1450219995012,19cyclictest0-21swapper/711:50:157
1450211995012,19cyclictest0-21swapper/312:30:143
1450219994929,19cyclictest861rcuc/707:55:177
1450211994930,19cyclictest0-21swapper/312:05:153
1450211994930,0cyclictest0-21swapper/307:55:163
1450211994830,18cyclictest0-21swapper/310:35:163
1450209994830,0cyclictest0-21swapper/207:45:102
145021999467,39cyclictest0-21swapper/707:50:177
145020599467,19cyclictest0-21swapper/009:05:150
145021399440,44cyclictest0-21swapper/412:30:234
145021199435,19cyclictest0-21swapper/309:20:163
145021199434,39cyclictest0-21swapper/311:35:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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