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2026-09-04 - 06:54
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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 10 highest latencies:
System rack1slot2.osadl.org (updated Fri Sep 04, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2008523524,0sleep00-21swapper/019:29:560
1992923524,0sleep10-21swapper/119:28:081
2016823425,0sleep20-21swapper/219:30:542
1999123127,0sleep30-21swapper/319:28:503
29815070,0irq/29-eth0-tx-24652-21munin-node21:27:180
29815070,0irq/29-eth0-tx-20625-21munin-node20:17:060
203249976,0cyclictest16697-21unixbench_multi21:17:182
339960,0migration/33139-21sh22:10:463
339960,0migration/329473-21sh21:47:133
29815060,0irq/29-eth0-tx-2930-21munin-node21:12:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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