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2025-07-12 - 11:27
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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 rack4slot6.osadl.org (updated Sat Jul 12, 2025 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30311521220,113pltrace0-21swapper/119:10:011
17710521130,2pltrace0-21swapper/521:36:195
3031152940,86pltrace0-21swapper/519:08:245
2816227460,10sleep60-21swapper/619:05:036
2328352730,2pltrace0-21swapper/521:46:195
2816726854,10sleep20-21swapper/219:05:072
3057426450,10sleep30-21swapper/319:09:573
3049226349,10sleep70-21swapper/719:08:497
3032426046,10sleep00-21swapper/019:06:250
3022925743,10sleep40-21swapper/419:05:254
719052310,0pltrace0-21swapper/719:25:167
2219252290,0pltrace0-21swapper/720:50:187
440052270,6pltrace78-21ksoftirqd/719:16:597
3074599230,12cyclictest0-21swapper/119:57:241
2714752220,0pltrace0-21swapper/722:52:297
2993352210,1pltrace78-21ksoftirqd/722:56:197
314652200,0pltrace0-21swapper/723:10:167
30751991917,1cyclictest0-21swapper/221:16:052
3075599180,16cyclictest1331-21latency_hist19:15:013
1537852180,12pltrace15407-21chrt00:26:386
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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