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2026-04-07 - 00:32
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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 Mon Apr 06, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2219723829,0sleep10-21swapper/107:19:251
2213923826,0sleep20-21swapper/207:18:462
2186223727,0sleep30-21swapper/307:15:353
2181123624,0sleep00-21swapper/007:15:000
22279992121,0cyclictest0-21swapper/209:20:392
339960,0migration/35540-21munin-node07:29:453
339960,0migration/330449-21sh12:06:033
339960,0migration/310989-21munin-node12:34:463
29815060,0irq/29-eth0-tx-12036-21munin-node08:19:430
29815060,0irq/29-eth0-tx-0-21swapper/210:17:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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