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2026-04-15 - 22:39
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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 Apr 15, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2138626362,0sleep10-21swapper/107:19:181
2116925036,0sleep00-21swapper/007:16:480
2123323627,0sleep30-21swapper/307:17:323
1454623526,0sleep20-21swapper/207:15:182
215409976,0cyclictest0-21swapper/008:55:350
339960,0migration/38313-21sh12:48:503
339960,0migration/34351-21taskset09:56:053
339960,0migration/329255-21sh09:54:273
339960,0migration/315020-21munin-node11:35:373
339960,0migration/313221-21munin-node12:30:393
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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