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2026-08-18 - 20:10
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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 Tue Aug 18, 2026 12:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2438327140,21sleep126-21ksoftirqd/107:05:181
257899911211,25cyclictest0-21swapper/108:10:111
257849911283,17cyclictest14-21ksoftirqd/010:40:140
2022721120,5chrt20207-21timerandwakeup08:20:361
257899910912,25cyclictest0-21swapper/109:40:131
257899910911,26cyclictest0-21swapper/109:05:131
257849910980,19cyclictest14-21ksoftirqd/010:25:160
257899910816,23cyclictest0-21swapper/108:30:241
257899910813,24cyclictest0-21swapper/111:15:151
257899910811,25cyclictest0-21swapper/112:25:221
257899910714,27cyclictest0-21swapper/107:35:151
257899910713,28cyclictest0-21swapper/110:55:131
257899910711,25cyclictest0-21swapper/107:45:151
257899910612,27cyclictest0-21swapper/108:45:131
257899910612,23cyclictest0-21swapper/109:30:151
257899910514,27cyclictest0-21swapper/111:45:121
257899910512,27cyclictest0-21swapper/112:20:131
257899910512,23cyclictest0-21swapper/108:25:171
257899910511,27cyclictest0-21swapper/112:10:121
257899910510,27cyclictest0-21swapper/107:10:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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