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2026-09-06 - 08:02
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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 Sun Sep 06, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2820826362,0sleep00-21swapper/019:28:210
2827324738,0sleep10-21swapper/119:29:061
2829723726,0sleep30-21swapper/319:29:243
2828122824,0sleep20-21swapper/219:29:112
285939974,0cyclictest25250-21awk00:32:030
339960,0migration/35631-21sh22:42:513
339960,0migration/34235-21sh22:24:163
339960,0migration/32744-21munin-node20:17:253
339960,0migration/324838-21sh23:13:253
339960,0migration/320070-21sh22:15:573
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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