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2026-09-02 - 06:08
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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 Wed Sep 02, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2115025150,0sleep10-21swapper/119:28:441
2120823526,0sleep30-21swapper/319:29:223
2137523423,0sleep00-21swapper/019:31:190
2111122925,0sleep20-21swapper/219:28:132
21494991313,0cyclictest12012-21awk19:46:572
4160,0ktimersoftd/00-21swapper/022:29:170
339960,0migration/39671-21sh00:42:143
339960,0migration/31957-21sh21:49:523
339960,0migration/311879-21munin-node23:47:023
339960,0migration/311137-21sh23:28:373
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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