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2025-03-20 - 02:25
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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 Mar 19, 2025 12:46:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2680346994370,429cyclictest284444850sshd-session10:25:5814
2680342994260,425cyclictest0-21swapper/411:41:1410
2680342994260,0cyclictest0-21swapper/410:55:2610
268034099425421,3cyclictest2680715-21kworker/u64:1+events_unbound07:34:158
268034099422422,0cyclictest0-21swapper/210:06:198
268034099422422,0cyclictest0-21swapper/210:06:188
268034099422421,1cyclictest0-21swapper/209:53:588
268034099421418,2cyclictest2864406-21kworker/u64:5+events_unbound12:20:458
268034699415414,1cyclictest0-21swapper/811:34:0414
268034899408406,1cyclictest0-21swapper/1008:21:002
268034699406404,1cyclictest28450irq/127-xhci_hcd08:21:0014
268034699404403,1cyclictest28450irq/127-xhci_hcd12:10:2714
268034699403401,1cyclictest0-21swapper/810:09:0814
268034699403401,1cyclictest0-21swapper/810:09:0814
268034699401399,1cyclictest0-21swapper/809:53:5814
268034699398396,1cyclictest28450irq/127-xhci_hcd09:24:5914
268034699397396,1cyclictest28450irq/127-xhci_hcd11:35:5814
268034899396395,1cyclictest0-21swapper/1011:54:102
268034899396395,1cyclictest0-21swapper/1009:01:082
268034899396393,2cyclictest2805118-21kworker/u64:0+events_unbound09:42:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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