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2025-11-19 - 10:50
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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 rack1slot3.osadl.org (updated Wed Nov 19, 2025 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2397757991411,1cyclictest0-21swapper/320:35:143
239775799140,11cyclictest0-21swapper/323:10:213
239775799138,0cyclictest0-21swapper/319:15:143
239775799131,11cyclictest0-21swapper/322:00:173
239775799130,1cyclictest0-21swapper/320:00:173
239775799130,11cyclictest0-21swapper/321:00:133
239775799130,11cyclictest0-21swapper/319:50:143
239775799120,11cyclictest69450irq/121-eno121:43:493
239775799120,11cyclictest0-21swapper/323:45:133
239775799120,11cyclictest0-21swapper/323:25:013
239775799120,11cyclictest0-21swapper/320:45:143
239775799120,11cyclictest0-21swapper/320:05:133
239775799120,11cyclictest0-21swapper/300:40:023
239775799119,1cyclictest0-21swapper/320:30:133
239775799111,9cyclictest69450irq/121-eno122:40:153
2397757991111,0cyclictest0-21swapper/319:20:023
2397757991110,0cyclictest69450irq/121-eno100:05:223
2397757991110,0cyclictest0-21swapper/321:15:153
239775799110,10cyclictest69450irq/121-eno123:22:473
239775799110,10cyclictest0-21swapper/322:35:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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