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2025-10-16 - 03:25
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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 rack0slot8.osadl.org (updated Wed Oct 15, 2025 12:45:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
342257699427423,3cyclictest3651708-21kworker/u64:4+events_unbound11:44:391
342258399412409,2cyclictest3591498-21kworker/u64:0+events_unbound10:10:0413
342257699412409,2cyclictest3487517-21kworker/u64:4+events_unbound09:49:291
342257699410407,2cyclictest3582520-21kworker/u64:5+events_unbound10:06:491
342258399408405,2cyclictest3628367-21kworker/u64:5+events_unbound11:49:5513
342258399408405,2cyclictest3623879-21kworker/u64:1+events_unbound11:02:2413
342258399408405,2cyclictest3449108-21kworker/u64:1+events_unbound10:08:5913
342257699408407,1cyclictest0-21swapper/111:05:271
342258599406405,1cyclictest0-21swapper/911:44:3915
342257699406405,1cyclictest0-21swapper/111:36:181
342258099399398,1cyclictest0-21swapper/410:18:5710
342258599394390,3cyclictest3642662-21kworker/u64:3+events_unbound11:05:2715
342258599392391,1cyclictest0-21swapper/909:49:2915
342258599391387,3cyclictest3660194-21kworker/u64:0+events_unbound11:36:1815
342258599389389,0cyclictest0-21swapper/910:05:0715
342259199384383,0cyclictest0-21swapper/1511:44:397
342258799384381,2cyclictest1842759-21vncviewer11:42:143
342259199378376,1cyclictest0-21swapper/1511:10:347
342258199376375,1cyclictest0-21swapper/510:05:4311
342258499375374,1cyclictest28550irq/127-xhci_hcd10:18:5714
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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