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2025-12-07 - 01:54
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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 rack3slot6.osadl.org (updated Sun Dec 07, 2025 00:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12767991306,102cyclictest0-21swapper/022:25:150
127759910913,28cyclictest0-21swapper/119:45:151
127759910714,29cyclictest0-21swapper/120:35:131
12767991037,76cyclictest0-21swapper/000:10:230
12767991026,73cyclictest0-21swapper/021:15:130
127759910112,30cyclictest0-21swapper/100:20:151
127759910013,27cyclictest0-21swapper/119:10:141
127759910012,34cyclictest23138-21diskmemload21:10:151
12775999913,26cyclictest0-21swapper/121:40:151
12775999912,28cyclictest0-21swapper/100:10:141
1276799996,74cyclictest0-21swapper/021:05:140
1276799996,72cyclictest0-21swapper/000:15:160
12767999910,70cyclictest0-21swapper/023:45:260
12775999813,26cyclictest0-21swapper/100:25:191
12775999812,28cyclictest0-21swapper/121:55:121
12775999812,25cyclictest0-21swapper/100:35:151
1276799987,69cyclictest0-21swapper/000:35:110
1276799986,73cyclictest0-21swapper/023:40:130
1257529836,50sleep10-21swapper/119:09:301
1276799979,68cyclictest0-21swapper/022:55:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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