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2026-04-22 - 14:52
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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 rack3slot6.osadl.org (updated Wed Apr 22, 2026 12:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
271239912418,90cyclictest0-21swapper/011:05:240
27123991127,78cyclictest0-21swapper/008:20:120
271239910642,47cyclictest14-21ksoftirqd/010:30:120
271239910355,29cyclictest0-21swapper/009:15:140
271239910210,20cyclictest0-21swapper/008:30:140
27127999410,71cyclictest5819-21diskmemload09:10:111
27123999411,58cyclictest0-21swapper/011:10:110
27123999411,58cyclictest0-21swapper/011:10:110
27123999316,54cyclictest0-21swapper/008:05:110
27123999211,54cyclictest0-21swapper/009:05:110
27123999110,57cyclictest0-21swapper/008:25:120
2652729119,26sleep00-21swapper/007:05:460
27123999011,57cyclictest0-21swapper/009:40:110
2712399899,57cyclictest0-21swapper/008:35:120
27123998910,59cyclictest0-21swapper/010:10:110
27123998811,53cyclictest0-21swapper/010:35:110
27123998619,50cyclictest0-21swapper/010:25:120
27123998610,57cyclictest0-21swapper/012:10:120
2661028643,31sleep10-21swapper/107:06:401
27123998512,53cyclictest6584-21taskset07:40:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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