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2025-12-07 - 18:00
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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 Dec 07, 2025 12:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3270243997455,19cyclictest0-21swapper/307:30:263
3270243996628,19cyclictest362-21jbd2/sda2-808:13:193
3270243996022,0cyclictest191rcu_preempt11:00:173
327024399580,39cyclictest3279956-21gltestperf07:25:163
3270247995613,19cyclictest0-21swapper/711:25:197
3270228995414,39cyclictest0-21swapper/010:40:160
3270247995213,39cyclictest0-21swapper/707:55:177
327024799506,39cyclictest0-21swapper/710:40:177
327022899499,39cyclictest0-21swapper/010:35:180
327022899498,39cyclictest3264599-21kworker/0:2+ice08:45:160
3270244994810,38cyclictest0-21swapper/411:55:154
3270235994847,1cyclictest191rcu_preempt07:35:171
327024799479,19cyclictest0-21swapper/709:25:187
3270245994729,18cyclictest0-21swapper/510:02:385
327024399479,19cyclictest0-21swapper/307:35:173
327024799467,20cyclictest0-21swapper/708:55:167
327024799467,20cyclictest0-21swapper/708:55:167
327024799463,19cyclictest0-21swapper/708:50:187
327024799463,19cyclictest0-21swapper/708:50:187
327022899446,19cyclictest0-21swapper/011:50:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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