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2025-07-15 - 22:31
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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 Tue Jul 15, 2025 12:45:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12891099426424,1cyclictest28550irq/127-xhci_hcd12:35:4814
12891099426424,1cyclictest28550irq/127-xhci_hcd12:06:4914
12891099426424,1cyclictest28550irq/127-xhci_hcd12:06:4914
12891099426424,1cyclictest28550irq/127-xhci_hcd09:52:2914
12891099425424,1cyclictest28550irq/127-xhci_hcd09:26:0514
12891099425424,1cyclictest28550irq/127-xhci_hcd07:25:3714
12891099425423,1cyclictest28550irq/127-xhci_hcd11:34:2114
12891099425423,1cyclictest28550irq/127-xhci_hcd11:28:0514
12890899423419,3cyclictest342486-21kworker/u64:4+events_unbound12:30:3612
12891099422420,1cyclictest28550irq/127-xhci_hcd09:01:4314
12890899422418,3cyclictest426479-21kworker/u64:1+events_unbound12:16:5012
12891099421420,1cyclictest28550irq/127-xhci_hcd09:58:5914
12890899420417,2cyclictest248373-21kworker/u64:2+events_unbound09:26:0512
12891399416416,0cyclictest0-21swapper/1009:52:292
12891399416412,3cyclictest223712-21kworker/u64:0+events_unbound09:58:592
12891399412411,1cyclictest0-21swapper/1009:01:442
12890999408405,2cyclictest273607-21kworker/u64:5+events_unbound10:01:4513
12891799393391,1cyclictest0-21swapper/1209:11:194
12890999392389,2cyclictest406120-21kworker/u64:2+events_unbound12:06:4913
12890999392389,2cyclictest406120-21kworker/u64:2+events_unbound12:06:4913
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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