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2026-07-05 - 20:44
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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
Characteristics of the 20 highest latencies:
System rackcslot6.osadl.org (updated Sun Jul 05, 2026 12:46:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
43344499358357,1cyclictest0-21swapper/408:00:014
43344499356355,1cyclictest0-21swapper/409:35:014
43344499356354,1cyclictest509494-21kworker/4:011:23:014
43344499355354,1cyclictest0-21swapper/411:06:024
43344499354353,1cyclictest732791-21kworker/4:007:16:014
43344499354352,1cyclictest0-21swapper/407:35:014
43344499353352,1cyclictest0-21swapper/412:25:014
43344499353351,1cyclictest0-21swapper/412:00:014
43344499352351,1cyclictest0-21swapper/411:13:014
43344499352351,1cyclictest0-21swapper/409:55:024
43344499352351,1cyclictest0-21swapper/409:20:014
43344499352350,1cyclictest0-21swapper/410:05:014
43344499351350,1cyclictest0-21swapper/409:45:024
43344499351350,1cyclictest0-21swapper/409:16:014
43344499351350,1cyclictest0-21swapper/409:16:014
43344499351350,1cyclictest0-21swapper/408:40:014
43344499351349,1cyclictest0-21swapper/412:05:014
43344499350349,1cyclictest0-21swapper/408:35:014
43344499349347,1cyclictest467370-21kworker/4:208:20:024
43344499348346,1cyclictest509494-21kworker/4:009:50:024
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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